diff --git a/music/zero_wing/Makefile b/music/zero_wing/Makefile index 6e958d99..ccc4d59a 100644 --- a/music/zero_wing/Makefile +++ b/music/zero_wing/Makefile @@ -13,13 +13,14 @@ all: zw.dsk # $(DOS33) -y zw.dsk SAVE A HELLO # $(DOS33) -y zw.dsk BSAVE -a 0x6000 ZW -zw.dsk: QBOOT QLOAD ZW +zw.dsk: QBOOT QLOAD ZW MUSIC cp $(EMPTY_DISK) zw.dsk $(DOS33_RAW) zw.dsk 0 0 QBOOT 0 1 $(DOS33_RAW) zw.dsk 0 2 QBOOT 1 1 $(DOS33_RAW) zw.dsk 0 4 QBOOT 2 1 $(DOS33_RAW) zw.dsk 1 0 QLOAD 0 0 - $(DOS33_RAW) zw.dsk 3 0 ZW 0 0 + $(DOS33_RAW) zw.dsk 3 0 MUSIC 0 0 + $(DOS33_RAW) zw.dsk 5 0 ZW 0 0 #### @@ -35,16 +36,18 @@ qboot_sector.o: qboot_sector.s qboot_stage2.s QLOAD: qload.o ld65 -o QLOAD qload.o -C $(LINKER_SCRIPTS)/apple2_1200.inc -qload.o: qload.s -# hgr.inc \ -# audio.s decompress_fast_v2.s gr_offsets.s \ -# wait.s wait_a_bit.s \ +qload.o: qload.s \ + gr_offsets.s \ + wait.s wait_a_bit.s \ + lc_detect.s gr_fast_clear.s \ + text_print.s \ + pt3_lib_detect_model.s pt3_lib_mockingboard_detect.s \ + pt3_lib_mockingboard_setup.s interrupt_handler.s \ + pt3_lib_mockingboard_patch.s +# hgr.inc simple_sounds.s \ +# audio.s decompress_fast_v2.s # hgr_hlin.s hgr_vlin.s hgr_box.s hgr_tables.s hgr_14x14_sprite.s \ -# hgr_sprite.s hgr_partial_restore.s lc_detect.s gr_fast_clear.s \ -# text_print.s simple_sounds.s \ -# pt3_lib_detect_model.s pt3_lib_mockingboard_detect.s \ -# pt3_lib_mockingboard_setup.s interrupt_handler.s \ -# pt3_lib_mockingboard_patch.s +# hgr_sprite.s hgr_partial_restore.s ca65 -o qload.o qload.s -l qload.lst #### @@ -54,11 +57,71 @@ ZW: zw.o zw.o: zw.s zx02_optim.s \ text_print.s \ - zp.inc hardware.inc + zp.inc hardware.inc qload.inc music.inc ca65 -o zw.o zw.s -l zw.lst #### +qload.inc: generate_common QLOAD + ./generate_common -a 0x1200 -s load_file qload.lst > qload.inc + ./generate_common -a 0x1200 -s detect_appleii_model qload.lst >> qload.inc + ./generate_common -a 0x1200 -s clear_all qload.lst >> qload.inc + ./generate_common -a 0x1200 -s set_normal qload.lst >> qload.inc + ./generate_common -a 0x1200 -s set_inverse qload.lst >> qload.inc + ./generate_common -a 0x1200 -s wait qload.lst >> qload.inc + ./generate_common -a 0x1200 -s wait_a_bit qload.lst >> qload.inc + ./generate_common -a 0x1200 -s move_and_print qload.lst >> qload.inc + ./generate_common -a 0x1200 -s detect_language_card qload.lst >> qload.inc + ./generate_common -a 0x1200 -s mockingboard_detect qload.lst >> qload.inc + ./generate_common -a 0x1200 -s clear_bottom qload.lst >> qload.inc + +# ./generate_common -a 0x1200 -s mockingboard_patch qload.lst >> qload.inc +# ./generate_common -a 0x1200 -s mockingboard_init qload.lst >> qload.inc +# ./generate_common -a 0x1200 -s mockingboard_setup_interrupt qload.lst >> qload.inc +# ./generate_common -a 0x1200 -s disable_music qload.lst >> qload.inc +# ./generate_common -a 0x1200 -s reset_ay_both qload.lst >> qload.inc +# ./generate_common -a 0x1200 -s clear_ay_both qload.lst >> qload.inc + +#### + +music.inc: generate_common MUSIC + ./generate_common -a 0xd000 -s pt3_init_song music.lst > music.inc + ./generate_common -a 0xd000 -s mockingboard_init music.lst >> music.inc + ./generate_common -a 0xd000 -s reset_ay_both music.lst >> music.inc + ./generate_common -a 0xd000 -s clear_ay_both music.lst >> music.inc + ./generate_common -a 0xd000 -s mockingboard_setup_interrupt music.lst >> music.inc + ./generate_common -a 0xd000 -s mockingboard_disable_interrupt music.lst >> music.inc + ./generate_common -a 0xd000 -s done_pt3_irq_handler music.lst >> music.inc + ./generate_common -a 0xd000 -s PT3_LOC music.lst >> music.inc + +#### + +MUSIC: music.o + ld65 -o MUSIC music.o -C $(LINKER_SCRIPTS)/apple2_d000.inc + +music.o: music.s zp.inc \ + music/zw.pt3 \ + pt3_lib_core.s \ + pt3_lib_mockingboard_detect.s \ + pt3_lib_mockingboard.inc \ + pt3_lib_init.s \ + pt3_lib_mockingboard_setup.s \ + pt3_lib_irq_handler.s + ca65 -o music.o music.s -l music.lst + + + + + +generate_common: generate_common.o + $(CC) $(LFLAGS) -o generate_common generate_common.o + +generate_common.o: generate_common.c + $(CC) $(CFLAGS) -c generate_common.c + +### + + HELLO: hello.bas $(TOKENIZE) < hello.bas > HELLO @@ -66,4 +129,4 @@ HELLO: hello.bas clean: - rm -f *~ *.o *.lst HELLO ZW QBOOT QLOAD + rm -f *~ *.o *.lst HELLO ZW QBOOT QLOAD MUSIC diff --git a/music/zero_wing/generate_common.c b/music/zero_wing/generate_common.c new file mode 100644 index 00000000..aa8e095c --- /dev/null +++ b/music/zero_wing/generate_common.c @@ -0,0 +1,77 @@ +#include +#include +#include +#include + + + +static FILE *fff; + + +static void find_address(char *symbol_name, int routine_offset) { + + unsigned int addr=0; + char string[BUFSIZ],*result; + char temp_name[BUFSIZ]; + + strncpy(temp_name,symbol_name,BUFSIZ); + strncat(temp_name,":",2); + + while(1) { + + result=fgets(string,BUFSIZ,fff); + if (result==NULL) { + fprintf(stderr,"Error: %s not found!\n",symbol_name); + exit(-1); + } + + result=strstr(string,temp_name); + if (result!=NULL) { + string[6]=0; + sscanf(string,"%x",&addr); + break; + } + } + + + printf("%s\t=$%04x\n",symbol_name,addr+routine_offset); +} + +int main(int argc, char **argv) { + + int c; + char *filename; + char symbol[BUFSIZ]; + int routine_offset=0xd000; + + while ( (c=getopt(argc, argv, "a:s:") ) != -1) { + + switch(c) { + + case 'a': + routine_offset=strtol(optarg, NULL, 0); + break; + case 's': + strncpy(symbol,optarg,BUFSIZ-1); + break; + default: + fprintf(stderr,"Unknown option %c\n",c); + exit(-1); + break; + } + } + + filename=strdup(argv[optind]); + + fff=fopen(filename,"r"); + if (fff==NULL) { + fprintf(stderr,"ERROR! could not open %s\n",filename); + return -1; + } + + find_address(symbol,routine_offset); + + fclose(fff); + + return 0; +} diff --git a/music/zero_wing/gr_fast_clear.s b/music/zero_wing/gr_fast_clear.s new file mode 100644 index 00000000..76035a21 --- /dev/null +++ b/music/zero_wing/gr_fast_clear.s @@ -0,0 +1,201 @@ +;clear_screens: +; ;=================================== +; ; Clear top/bottom of page 0 +; ;=================================== +; +; lda #$0 +; sta DRAW_PAGE +; jsr clear_top +; jsr clear_bottom + +; ;=================================== +; ; Clear top/bottom of page 1 +; ;=================================== +; +; lda #$4 +; sta DRAW_PAGE +; jsr clear_top +; jsr clear_bottom +; +; rts + + + + + ;========================================================= + ; clear_top + ;========================================================= + ; clear DRAW_PAGE + ; original = 14,558 cycles(?) 15ms, 70Hz + ; OPTIMIZED MAX (page0,48rows): 45*120+4+6 = 5410 = 5.4ms 185Hz + ; (pageX,40rows): 50*120+4+6 = 6010 = 6.0ms 166Hz + ; 50*120+4+6+37 = 6055 = 6.0ms 166Hz +clear_top: + lda #0 ; 2 +clear_top_a: + sta COLOR ; 3 + clc ; 2 + lda DRAW_PAGE ; 3 + + adc #4 ; 2 + sta __ctf+2 ; 3 + sta __ctf+5 ; 3 + adc #1 ; 2 + sta __ctf+8 ; 3 + sta __ctf+11 ; 3 + adc #1 ; 2 + sta __ctf2+2 ; 3 + sta __ctf2+5 ; 3 + adc #1 ; 2 + sta __ctf2+8 ; 3 + sta __ctf2+11 ; 3 + + + ldy #120 ; 2 + lda COLOR ; 3 +clear_top_fast_loop: +__ctf: + sta $400,Y ; 5 + sta $480,Y ; 5 + sta $500,Y ; 5 + sta $580,Y ; 5 + + cpy #80 ; 2 + bpl no_draw_bottom ; 2nt/3 +__ctf2: + sta $600,Y ; 5 + sta $680,Y ; 5 + sta $700,Y ; 5 + sta $780,Y ; 5 +no_draw_bottom: + + dey ; 2 + bpl clear_top_fast_loop ; 2nt/3 + + rts ; 6 + + + + + ;========================================================= + ; clear_bottom + ;========================================================= + ; clear bottom of draw page + +clear_bottom: + clc ; 2 + lda DRAW_PAGE ; 3 + + adc #6 ; 2 + sta __cbf2+2 ; 3 + sta __cbf2+5 ; 3 + adc #1 ; 2 + sta __cbf2+8 ; 3 + sta __cbf2+11 ; 3 + + + ldy #120 ; 2 + lda #$a0 ; Normal Space ; 2 +clear_bottom_fast_loop: +__cbf2: + sta $600,Y ; 5 + sta $680,Y ; 5 + sta $700,Y ; 5 + sta $780,Y ; 5 + + dey ; 2 + cpy #80 ; 2 + bpl clear_bottom_fast_loop ; 2nt/3 + + rts ; 6 + + +;clear_screens_notext: + ;=================================== + ; Clear top/bottom of page 0 + ;=================================== + +; lda #$0 +; sta DRAW_PAGE +; jsr clear_all + + ;=================================== + ; Clear top/bottom of page 1 + ;=================================== + +; lda #$4 +; sta DRAW_PAGE +; jsr clear_all + +; rts + + +clear_bottoms: + + lda DRAW_PAGE + pha + + ;=================================== + ; Clear bottom of page 0 + ;=================================== + + lda #$0 + sta DRAW_PAGE + jsr clear_bottom + + ;=================================== + ; Clear bottom of page 1 + ;=================================== + + lda #$4 + sta DRAW_PAGE + jsr clear_bottom + + pla + sta DRAW_PAGE + + rts + + + ;========================================================= + ; clear_all + ;========================================================= + ; clear 48 rows + +clear_all: + clc ; 2 + lda DRAW_PAGE ; 3 + + adc #4 ; 2 + sta __caf+2 ; 3 + sta __caf+5 ; 3 + adc #1 ; 2 + sta __caf+8 ; 3 + sta __caf+11 ; 3 + adc #1 ; 2 + sta __caf2+2 ; 3 + sta __caf2+5 ; 3 + adc #1 ; 2 + sta __caf2+8 ; 3 + sta __caf2+11 ; 3 + + + ldy #120 ; 2 +clear_all_color: + lda #' '|$80 ; 2 +clear_all_fast_loop: +__caf: + sta $400,Y ; 5 + sta $480,Y ; 5 + sta $500,Y ; 5 + sta $580,Y ; 5 +__caf2: + sta $600,Y ; 5 + sta $680,Y ; 5 + sta $700,Y ; 5 + sta $780,Y ; 5 + + dey ; 2 + bpl clear_all_fast_loop ; 2nt/3 + + rts ; 6 diff --git a/music/zero_wing/hardware.inc b/music/zero_wing/hardware.inc index d8e4d440..0d1cfc38 100644 --- a/music/zero_wing/hardware.inc +++ b/music/zero_wing/hardware.inc @@ -8,7 +8,10 @@ CLR80COL = $C000 ; PAGE0/PAGE1 normal SET80COL = $C001 ; PAGE0/PAGE1 switches PAGE0 in Aux instead EIGHTYCOLOFF = $C00C EIGHTYCOLON = $C00D +TBCOLOR = $C022 ; IIgs fg/bg colors +NEWVIDEO = $C029 ; IIgs graphics modes SPEAKER = $C030 +CLOCKCTL = $C034 ; bits 0-3 are IIgs border color SET_GR = $C050 SET_TEXT = $C051 FULLGR = $C052 @@ -34,8 +37,10 @@ VLINE = $F828 ;; VLINE A,$2D at Y CLRSCR = $F832 ;; Clear low-res screen CLRTOP = $F836 ;; clear only top of low-res screen SETCOL = $F864 ;; COLOR=A +ROM_TEXT2COPY = $F962 ;; iigs TEXT = $FB36 TABV = $FB5B ;; VTAB to A +ROM_MACHINEID = $FBB3 ;; iigs BASCALC = $FBC1 ;; VTAB = $FC22 ;; VTAB to CV HOME = $FC58 ;; Clear the text screen diff --git a/music/zero_wing/interrupt_handler.s b/music/zero_wing/interrupt_handler.s new file mode 100644 index 00000000..85da4909 --- /dev/null +++ b/music/zero_wing/interrupt_handler.s @@ -0,0 +1,69 @@ + ;================================ + ;================================ + ; mockingboard interrupt handler + ;================================ + ;================================ + ; On Apple II/6502 the interrupt handler jumps to address in 0xfffe + ; This is in the ROM, which saves the registers + ; on older IIe it saved A to $45 (which could mess with DISK II) + ; newer IIe doesn't do that. + ; It then calculates if it is a BRK or not (which trashes A) + ; Then it sets up the stack like an interrupt and calls 0x3fe + + ; Note: the IIc is much more complicated + ; its firmware tries to decode the proper source + ; based on various things, including screen hole values + ; we bypass that by switching out ROM and replacing the + ; $fffe vector with this, but that does mean we have + ; to be sure status flag and accumulator set properly + +interrupt_handler: + php ; save status flags + cld ; clear decimal mode + pha ; save A ; 3 + ; A is saved in $45 by firmware + txa + pha ; save X + tya + pha ; save Y + +; inc $0404 ; debug (flashes char onscreen) + + +.include "pt3_lib_irq_handler.s" + + jmp exit_interrupt + + ;================================= + ; Finally done with this interrupt + ;================================= + +quiet_exit: + stx DONE_PLAYING + jsr clear_ay_both + + ldx #$ff ; also mute the channel + stx AY_REGISTERS+7 ; just in case + + +exit_interrupt: + + pla + tay ; restore Y + pla + tax ; restore X + pla ; restore a ; 4 + + ; on II+/IIe (but not IIc) we need to do this? +interrupt_smc: + lda $45 ; restore A + plp + + rti ; return from interrupt ; 6 + + ;============ + ; typical + ; ???? cycles + + + diff --git a/music/zero_wing/lc_detect.s b/music/zero_wing/lc_detect.s new file mode 100644 index 00000000..3123a6ae --- /dev/null +++ b/music/zero_wing/lc_detect.s @@ -0,0 +1,40 @@ +; Code from TotalReplay by 4am and qkumba + +;------------------------------------------------------------------------------ +; Has64K +; Checks whether computer has functioning language card (64K) +; +; in: none +; out: C clear if 64K detected +; C set if 64K not detected +; all other flags and registers clobbered +; ROM in memory (not LC RAM bank) +;------------------------------------------------------------------------------ + +detect_language_card: + + ; enable language card + ; READ_RAM1_WRITE_RAM1 + + bit $C08B + bit $C08B + + lda #$AA ; test #1 for $D0 page + sta $D000 + eor $D000 + bne no_lc + lsr $D000 ; test #2 for $D0 page + lda #$55 + eor $D000 + bne no_lc + clc + bcc done_detect + +no_lc: + sec + +done_detect: + ; READ_ROM_NO_WRITE + bit $C08A + + rts diff --git a/music/zero_wing/music.s b/music/zero_wing/music.s new file mode 100644 index 00000000..000adc94 --- /dev/null +++ b/music/zero_wing/music.s @@ -0,0 +1,31 @@ +; music, music + +; by Vince `deater` Weaver vince@deater.net + +.include "hardware.inc" +.include "zp.inc" + +;.include "qload.inc" + +music_lib: + +PT3_ENABLE_APPLE_IIC = 1 + + nop ; urgh to keep interrupt_handler from starting at $C4 + ; which broke auto-patcher + + ; pt3 player +; .include "pt3_lib_detect_model.s" + .include "pt3_lib_core.s" + .include "pt3_lib_init.s" + .include "pt3_lib_mockingboard_setup.s" + .include "interrupt_handler.s" + .include "pt3_lib_mockingboard_detect.s" + + +; only load one music track, self modify to make other + +.align $100 +PT3_LOC: +.incbin "music/zw.pt3" + diff --git a/music/zero_wing/zw.pt3 b/music/zero_wing/music/zw.pt3 similarity index 91% rename from music/zero_wing/zw.pt3 rename to music/zero_wing/music/zw.pt3 index 2da7a443..4af3983e 100644 Binary files a/music/zero_wing/zw.pt3 and b/music/zero_wing/music/zw.pt3 differ diff --git a/music/zero_wing/pt3_lib_core.s b/music/zero_wing/pt3_lib_core.s new file mode 100644 index 00000000..1118b5ae --- /dev/null +++ b/music/zero_wing/pt3_lib_core.s @@ -0,0 +1,1993 @@ +;=========================================== +; Library to decode Vortex Tracker PT3 files +; in 6502 assembly for Apple ][ Mockingboard +; +; by Vince Weaver + +; Roughly based on the Formats.pas Pascal code from Ay_Emul + +; Size Optimization -- Mem+Code (pt3_lib_end-note_a) +; + 3407 bytes -- original working implementation +; + 3302 bytes -- autogenerate the volume tables +; + 3297 bytes -- remove some un-needed bytes from struct +; + 3262 bytes -- combine some duplicated code in $1X/$BX env setting +; + 3253 bytes -- remove unnecessary variable +; + 3203 bytes -- combine common code in note decoder +; + 2937 bytes -- qkumba first pass +; + 2879 bytes -- qkumba second pass +; + 2839 bytes -- mask note command in common code +; + 2832 bytes -- combine $D0 and $E0 decode +; + 2816 bytes -- eliminate "decode_done" variable (2.75k) +; + 2817 bytes -- eliminate pt3_version. Slighly faster but also bigger +; + 2828 bytes -- fix some correctness issues +; + 2776 bytes -- init vars with loop (slower, but more correct and smaller) +; + 2739 bytes -- qkumba's crazy SMC everywhere patch +; + 2418+143 = 2561 bytes -- move NOTE structs to page0 +; + 2423+143 = 2566 bytes -- fix vibrato code +; + 2554+143 = 2697 bytes -- generate all four tone tables +; + 2537+143 = 2680 bytes -- inline GetNoteFreq + +; TODO +; move some of these flags to be bits rather than bytes? +; enabled could be bit 6 or 7 for fast checking +; NOTE_ENABLED,ENVELOPE_ENABLED,SIMPLE_GLISS,ENV_SLIDING,AMP_SLIDING? + +; Header offsets + +PT3_VERSION = $0D +PT3_HEADER_FREQUENCY = $63 +PT3_SPEED = $64 +PT3_LOOP = $66 +PT3_PATTERN_LOC_L = $67 +PT3_PATTERN_LOC_H = $68 +PT3_SAMPLE_LOC_L = $69 +PT3_SAMPLE_LOC_H = $6A +PT3_ORNAMENT_LOC_L = $A9 +PT3_ORNAMENT_LOC_H = $AA +PT3_PATTERN_TABLE = $C9 + +; Use memset to set things to 0? + +NOTE_VOLUME =0 +NOTE_TONE_SLIDING_L =1 +NOTE_TONE_SLIDING_H =2 +NOTE_ENABLED =3 +NOTE_ENVELOPE_ENABLED =4 +NOTE_SAMPLE_POINTER_L =5 +NOTE_SAMPLE_POINTER_H =6 +NOTE_SAMPLE_LOOP =7 +NOTE_SAMPLE_LENGTH =8 +NOTE_TONE_L =9 +NOTE_TONE_H =10 +NOTE_AMPLITUDE =11 +NOTE_NOTE =12 +NOTE_LEN =13 +NOTE_LEN_COUNT =14 +NOTE_ADDR_L =15 +NOTE_ADDR_H =16 +NOTE_ORNAMENT_POINTER_L =17 +NOTE_ORNAMENT_POINTER_H =18 +NOTE_ORNAMENT_LOOP =19 +NOTE_ORNAMENT_LENGTH =20 +NOTE_ONOFF =21 +NOTE_TONE_ACCUMULATOR_L =22 +NOTE_TONE_ACCUMULATOR_H =23 +NOTE_TONE_SLIDE_COUNT =24 +NOTE_ORNAMENT_POSITION =25 +NOTE_SAMPLE_POSITION =26 +NOTE_ENVELOPE_SLIDING =27 +NOTE_NOISE_SLIDING =28 +NOTE_AMPLITUDE_SLIDING =29 +NOTE_ONOFF_DELAY =30 ;ordering of DELAYs is hard-coded now +NOTE_OFFON_DELAY =31 ;ordering of DELAYs is hard-coded now +NOTE_TONE_SLIDE_STEP_L =32 +NOTE_TONE_SLIDE_STEP_H =33 +NOTE_TONE_SLIDE_DELAY =34 +NOTE_SIMPLE_GLISS =35 +NOTE_SLIDE_TO_NOTE =36 +NOTE_TONE_DELTA_L =37 +NOTE_TONE_DELTA_H =38 +NOTE_TONE_SLIDE_TO_STEP =39 + +NOTE_STRUCT_SIZE=40 + +.ifdef PT3_USE_ZERO_PAGE +note_a = $80 +note_b = $80+(NOTE_STRUCT_SIZE*1) +note_c = $80+(NOTE_STRUCT_SIZE*2) + +begin_vars=$80 +end_vars=$80+(NOTE_STRUCT_SIZE*3) + + +.else ; !PT3_USE_ZERO_PAGE +begin_vars: + +note_a: ; reset? + + .byte $0 ; NOTE_VOLUME ; 0 ; Y + .byte $0 ; NOTE_TONE_SLIDING_L ; 1 ; Y + .byte $0 ; NOTE_TONE_SLIDING_H ; 2 ; Y + .byte $0 ; NOTE_ENABLED ; 3 ; Y + .byte $0 ; NOTE_ENVELOPE_ENABLED ; 4 ; Y + .byte $0 ; NOTE_SAMPLE_POINTER_L ; 5 ; Y + .byte $0 ; NOTE_SAMPLE_POINTER_H ; 6 ; Y + .byte $0 ; NOTE_SAMPLE_LOOP ; 7 ; Y + .byte $0 ; NOTE_SAMPLE_LENGTH ; 8 ; Y + .byte $0 ; NOTE_TONE_L ; 9 + .byte $0 ; NOTE_TONE_H ; 10 + .byte $0 ; NOTE_AMPLITUDE ; 11 + .byte $0 ; NOTE_NOTE ; 12 + .byte $0 ; NOTE_LEN ; 13 + .byte $0 ; NOTE_LEN_COUNT ; 14 + .byte $0 ; NOTE_ADDR_L ; 15 + .byte $0 ; NOTE_ADDR_H ; 16 + .byte $0 ; NOTE_ORNAMENT_POINTER_L ; 17 ; Y + .byte $0 ; NOTE_ORNAMENT_POINTER_H ; 18 ; Y + .byte $0 ; NOTE_ORNAMENT_LOOP ; 19 ; Y + .byte $0 ; NOTE_ORNAMENT_LENGTH ; 20 ; Y + .byte $0 ; NOTE_ONOFF ; 21 + .byte $0 ; NOTE_TONE_ACCUMULATOR_L ; 22 + .byte $0 ; NOTE_TONE_ACCUMULATOR_H ; 23 + .byte $0 ; NOTE_TONE_SLIDE_COUNT ; 24 + .byte $0 ; NOTE_ORNAMENT_POSITION ; 25 ; Y + .byte $0 ; NOTE_SAMPLE_POSITION ; 26 ; Y + .byte $0 ; NOTE_ENVELOPE_SLIDING ; 27 + .byte $0 ; NOTE_NOISE_SLIDING ; 28 + .byte $0 ; NOTE_AMPLITUDE_SLIDING ; 29 + .byte $0 ; NOTE_ONOFF_DELAY ; 30 + .byte $0 ; NOTE_OFFON_DELAY ; 31 + .byte $0 ; NOTE_TONE_SLIDE_STEP_L ; 32 + .byte $0 ; NOTE_TONE_SLIDE_STEP_H ; 33 + .byte $0 ; NOTE_TONE_SLIDE_DELAY ; 34 + .byte $0 ; NOTE_SIMPLE_GLISS ; 35 + .byte $0 ; NOTE_SLIDE_TO_NOTE ; 36 + .byte $0 ; NOTE_TONE_DELTA_L ; 37 + .byte $0 ; NOTE_TONE_DELTA_H ; 38 + .byte $0 ; NOTE_TONE_SLIDE_TO_STEP ; 39 + +note_b: + .byte $0 ; NOTE_VOLUME + .byte $0 ; NOTE_TONE_SLIDING_L + .byte $0 ; NOTE_TONE_SLIDING_H + .byte $0 ; NOTE_ENABLED + .byte $0 ; NOTE_ENVELOPE_ENABLED + .byte $0 ; NOTE_SAMPLE_POINTER_L + .byte $0 ; NOTE_SAMPLE_POINTER_H + .byte $0 ; NOTE_SAMPLE_LOOP + .byte $0 ; NOTE_SAMPLE_LENGTH + .byte $0 ; NOTE_TONE_L + .byte $0 ; NOTE_TONE_H + .byte $0 ; NOTE_AMPLITUDE + .byte $0 ; NOTE_NOTE + .byte $0 ; NOTE_LEN + .byte $0 ; NOTE_LEN_COUNT + .byte $0 ; NOTE_ADDR_L + .byte $0 ; NOTE_ADDR_H + .byte $0 ; NOTE_ORNAMENT_POINTER_L + .byte $0 ; NOTE_ORNAMENT_POINTER_H + .byte $0 ; NOTE_ORNAMENT_LOOP + .byte $0 ; NOTE_ORNAMENT_LENGTH + .byte $0 ; NOTE_ONOFF + .byte $0 ; NOTE_TONE_ACCUMULATOR_L + .byte $0 ; NOTE_TONE_ACCUMULATOR_H + .byte $0 ; NOTE_TONE_SLIDE_COUNT + .byte $0 ; NOTE_ORNAMENT_POSITION + .byte $0 ; NOTE_SAMPLE_POSITION + .byte $0 ; NOTE_ENVELOPE_SLIDING + .byte $0 ; NOTE_NOISE_SLIDING + .byte $0 ; NOTE_AMPLITUDE_SLIDING + .byte $0 ; NOTE_ONOFF_DELAY + .byte $0 ; NOTE_OFFON_DELAY + .byte $0 ; NOTE_TONE_SLIDE_STEP_L + .byte $0 ; NOTE_TONE_SLIDE_STEP_H + .byte $0 ; NOTE_TONE_SLIDE_DELAY + .byte $0 ; NOTE_SIMPLE_GLISS + .byte $0 ; NOTE_SLIDE_TO_NOTE + .byte $0 ; NOTE_TONE_DELTA_L + .byte $0 ; NOTE_TONE_DELTA_H + .byte $0 ; NOTE_TONE_SLIDE_TO_STEP + +note_c: + .byte $0 ; NOTE_VOLUME + .byte $0 ; NOTE_TONE_SLIDING_L + .byte $0 ; NOTE_TONE_SLIDING_H + .byte $0 ; NOTE_ENABLED + .byte $0 ; NOTE_ENVELOPE_ENABLED + .byte $0 ; NOTE_SAMPLE_POINTER_L + .byte $0 ; NOTE_SAMPLE_POINTER_H + .byte $0 ; NOTE_SAMPLE_LOOP + .byte $0 ; NOTE_SAMPLE_LENGTH + .byte $0 ; NOTE_TONE_L + .byte $0 ; NOTE_TONE_H + .byte $0 ; NOTE_AMPLITUDE + .byte $0 ; NOTE_NOTE + .byte $0 ; NOTE_LEN + .byte $0 ; NOTE_LEN_COUNT + .byte $0 ; NOTE_ADDR_L + .byte $0 ; NOTE_ADDR_H + .byte $0 ; NOTE_ORNAMENT_POINTER_L + .byte $0 ; NOTE_ORNAMENT_POINTER_H + .byte $0 ; NOTE_ORNAMENT_LOOP + .byte $0 ; NOTE_ORNAMENT_LENGTH + .byte $0 ; NOTE_ONOFF + .byte $0 ; NOTE_TONE_ACCUMULATOR_L + .byte $0 ; NOTE_TONE_ACCUMULATOR_H + .byte $0 ; NOTE_TONE_SLIDE_COUNT + .byte $0 ; NOTE_ORNAMENT_POSITION + .byte $0 ; NOTE_SAMPLE_POSITION + .byte $0 ; NOTE_ENVELOPE_SLIDING + .byte $0 ; NOTE_NOISE_SLIDING + .byte $0 ; NOTE_AMPLITUDE_SLIDING + .byte $0 ; NOTE_ONOFF_DELAY + .byte $0 ; NOTE_OFFON_DELAY + .byte $0 ; NOTE_TONE_SLIDE_STEP_L + .byte $0 ; NOTE_TONE_SLIDE_STEP_H + .byte $0 ; NOTE_TONE_SLIDE_DELAY + .byte $0 ; NOTE_SIMPLE_GLISS + .byte $0 ; NOTE_SLIDE_TO_NOTE + .byte $0 ; NOTE_TONE_DELTA_L + .byte $0 ; NOTE_TONE_DELTA_H + .byte $0 ; NOTE_TONE_SLIDE_TO_STEP +end_vars: +.endif + +load_ornament0_sample1: + lda #0 ; 2 + jsr load_ornament ; 6 + ; fall through + + ;=========================== + ; Load Sample + ;=========================== + ; sample in A + ; which note offset in X + + ; Sample table pointers are 16-bits little endian + ; There are 32 of these pointers starting at $6a:$69 + ; Our sample starts at address (A*2)+that pointer + ; We point SAMPLE_H:SAMPLE_L to this + ; then we load the length/data values + ; and then leave SAMPLE_H:SAMPLE_L pointing to begnning of + ; the sample data + + ; Optimization: + ; see comments on ornament setting + +load_sample1: + lda #1 ; 2 + +load_sample: + + sty PT3_TEMP ; 3 + + ;pt3->ornament_patterns[i]= + ; (pt3->data[0x6a+(i*2)]<<8)|pt3->data[0x69+(i*2)]; + + asl ; A*2 ; 2 + tay ; 2 + + ; Set the initial sample pointer + ; a->sample_pointer=pt3->sample_patterns[a->sample]; + + lda PT3_LOC+PT3_SAMPLE_LOC_L,Y ; 4+ + sta SAMPLE_L ; 3 + + lda PT3_LOC+PT3_SAMPLE_LOC_L+1,Y ; 4+ + + ; assume pt3 file is at page boundary + adc #>PT3_LOC ; 2 + sta SAMPLE_H ; 3 + + ; Set the loop value + ; a->sample_loop=pt3->data[a->sample_pointer]; + + ldy #0 ; 2 + lda (SAMPLE_L),Y ; 5+ + sta note_a+NOTE_SAMPLE_LOOP,X ; 5 + + ; Set the length value + ; a->sample_length=pt3->data[a->sample_pointer]; + + iny ; 2 + lda (SAMPLE_L),Y ; 5+ + sta note_a+NOTE_SAMPLE_LENGTH,X ; 5 + + ; Set pointer to beginning of samples + + lda SAMPLE_L ; 3 + adc #$2 ; 2 + sta note_a+NOTE_SAMPLE_POINTER_L,X ; 5 + lda SAMPLE_H ; 3 + adc #$0 ; 2 + sta note_a+NOTE_SAMPLE_POINTER_H,X ; 5 + + ldy PT3_TEMP ; 3 + + rts ; 6 + ;============ + ; 76 + + + ;=========================== + ; Load Ornament + ;=========================== + ; ornament value in A + ; note offset in X + + ; Ornament table pointers are 16-bits little endian + ; There are 16 of these pointers starting at $aa:$a9 + ; Our ornament starts at address (A*2)+that pointer + ; We point ORNAMENT_H:ORNAMENT_L to this + ; then we load the length/data values + ; and then leave ORNAMENT_H:ORNAMENT_L pointing to begnning of + ; the ornament data + + ; Optimization: + ; Loop and length only used once, can be located negative + ; from the pointer, but 6502 doesn't make addressing like that + ; easy. Can't self modify as channels A/B/C have own copies + ; of the var. + +load_ornament: + + sty PT3_TEMP ; save Y value ; 3 + + ;pt3->ornament_patterns[i]= + ; (pt3->data[0xaa+(i*2)]<<8)|pt3->data[0xa9+(i*2)]; + + asl ; A*2 ; 2 + tay ; 2 + + ; a->ornament_pointer=pt3->ornament_patterns[a->ornament]; + + lda PT3_LOC+PT3_ORNAMENT_LOC_L,Y ; 4+ + sta ORNAMENT_L ; 3 + + lda PT3_LOC+PT3_ORNAMENT_LOC_L+1,Y ; 4+ + + ; we're assuming PT3 is loaded to a page boundary + + adc #>PT3_LOC ; 2 + sta ORNAMENT_H ; 3 + + lda #0 ; 2 + sta note_a+NOTE_ORNAMENT_POSITION,X ; 5 + + tay ; 2 + + ; Set the loop value + ; a->ornament_loop=pt3->data[a->ornament_pointer]; + lda (ORNAMENT_L),Y ; 5+ + sta note_a+NOTE_ORNAMENT_LOOP,X ; 5 + + ; Set the length value + ; a->ornament_length=pt3->data[a->ornament_pointer]; + iny ; 2 + lda (ORNAMENT_L),Y ; 5+ + sta note_a+NOTE_ORNAMENT_LENGTH,X ; 5 + + ; Set the pointer to the value past the length + + lda ORNAMENT_L ; 3 + adc #$2 ; 2 + sta note_a+NOTE_ORNAMENT_POINTER_L,X ; 5 + lda ORNAMENT_H ; 3 + adc #$0 ; 2 + sta note_a+NOTE_ORNAMENT_POINTER_H,X ; 5 + + ldy PT3_TEMP ; restore Y value ; 3 + + rts ; 6 + + ;============ + ; 83 + + + + ;===================================== + ; Calculate Note + ;===================================== + ; note offset in X + +calculate_note: + + lda note_a+NOTE_ENABLED,X ; 4+ + bne note_enabled ; 2/3 + + sta note_a+NOTE_AMPLITUDE,X ; 5 + jmp done_note ; 3 + +note_enabled: + + lda note_a+NOTE_SAMPLE_POINTER_H,X ; 4+ + sta SAMPLE_H ; 3 + lda note_a+NOTE_SAMPLE_POINTER_L,X ; 4+ + sta SAMPLE_L ; 3 + + lda note_a+NOTE_ORNAMENT_POINTER_H,X ; 4+ + sta ORNAMENT_H ; 3 + lda note_a+NOTE_ORNAMENT_POINTER_L,X ; 4+ + sta ORNAMENT_L ; 3 + + + lda note_a+NOTE_SAMPLE_POSITION,X ; 4+ + asl ; 2 + asl ; 2 + tay ; 2 + + ; b0 = pt3->data[a->sample_pointer + a->sample_position * 4]; + lda (SAMPLE_L),Y ; 5+ + sta sample_b0_smc+1 ; 4 + + ; b1 = pt3->data[a->sample_pointer + a->sample_position * 4 + 1]; + iny ; 2 + lda (SAMPLE_L),Y ; 5+ + sta sample_b1_smc+1 ; 4 + + ; a->tone = pt3->data[a->sample_pointer + a->sample_position*4+2]; + ; a->tone+=(pt3->data[a->sample_pointer + a->sample_position*4+3])<<8; + ; a->tone += a->tone_accumulator; + iny ; 2 + lda (SAMPLE_L),Y ; 5+ + adc note_a+NOTE_TONE_ACCUMULATOR_L,X ; 4+ + sta note_a+NOTE_TONE_L,X ; 4 + + iny ; 2 + lda (SAMPLE_L),Y ; 5+ + adc note_a+NOTE_TONE_ACCUMULATOR_H,X ; 4+ + sta note_a+NOTE_TONE_H,X ; 4 + + ;============================= + ; Accumulate tone if set + ; (if sample_b1 & $40) + + bit sample_b1_smc+1 + bvc no_accum ; (so, if b1&0x40 is zero, skip it) + + sta note_a+NOTE_TONE_ACCUMULATOR_H,X + lda note_a+NOTE_TONE_L,X ; tone_accumulator=tone + sta note_a+NOTE_TONE_ACCUMULATOR_L,X + +no_accum: + + ;============================ + ; Calculate tone + ; j = a->note + (pt3->data[a->ornament_pointer + a->ornament_position] + clc ;;can be removed if ADC ACCUMULATOR_H cannot overflow + ldy note_a+NOTE_ORNAMENT_POSITION,X + lda (ORNAMENT_L),Y + adc note_a+NOTE_NOTE,X + + ; if (j < 0) j = 0; + bpl note_not_negative + lda #0 + + ; if (j > 95) j = 95; +note_not_negative: + cmp #96 + bcc note_not_too_high ; blt + + lda #95 + +note_not_too_high: + + ; w = GetNoteFreq(j,pt3->frequency_table); + + tay ; for GetNoteFreq later + + ; a->tone = (a->tone + a->tone_sliding + w) & 0xfff; + + clc + lda note_a+NOTE_TONE_SLIDING_L,X + adc note_a+NOTE_TONE_L,X + sta temp_word_l1_smc+1 + + lda note_a+NOTE_TONE_H,X + adc note_a+NOTE_TONE_SLIDING_H,X + sta temp_word_h1_smc+1 + + clc ;;can be removed if ADC SLIDING_H cannot overflow +temp_word_l1_smc: + lda #$d1 + adc NoteTable_low,Y ; GetNoteFreq + sta note_a+NOTE_TONE_L,X +temp_word_h1_smc: + lda #$d1 + adc NoteTable_high,Y ; GetNoteFreq + and #$0f + sta note_a+NOTE_TONE_H,X + + ;===================== + ; handle tone sliding + + lda note_a+NOTE_TONE_SLIDE_COUNT,X + bmi no_tone_sliding ; if (a->tone_slide_count > 0) { + beq no_tone_sliding + + dec note_a+NOTE_TONE_SLIDE_COUNT,X ; a->tone_slide_count--; + bne no_tone_sliding ; if (a->tone_slide_count==0) { + + + ; a->tone_sliding+=a->tone_slide_step + clc ;;can be removed if ADC freq_h cannot overflow + lda note_a+NOTE_TONE_SLIDING_L,X + adc note_a+NOTE_TONE_SLIDE_STEP_L,X + sta note_a+NOTE_TONE_SLIDING_L,X + tay ; save NOTE_TONE_SLIDING_L in y + lda note_a+NOTE_TONE_SLIDING_H,X + adc note_a+NOTE_TONE_SLIDE_STEP_H,X + sta note_a+NOTE_TONE_SLIDING_H,X + + ; a->tone_slide_count = a->tone_slide_delay; + lda note_a+NOTE_TONE_SLIDE_DELAY,X + sta note_a+NOTE_TONE_SLIDE_COUNT,X + + lda note_a+NOTE_SIMPLE_GLISS,X + bne no_tone_sliding ; if (!a->simplegliss) { + + ; FIXME: do these need to be signed compares? + +check1: + lda note_a+NOTE_TONE_SLIDE_STEP_H,X + bpl check2 ; if ( ((a->tone_slide_step < 0) && + + ; (a->tone_sliding <= a->tone_delta) || + + ; 16 bit signed compare + tya ; y has NOTE_TONE_SLIDING_L + cmp note_a+NOTE_TONE_DELTA_L,X ; NUM1-NUM2 + lda note_a+NOTE_TONE_SLIDING_H,X + sbc note_a+NOTE_TONE_DELTA_H,X + bvc sc_loser1 ; N eor V + eor #$80 +sc_loser1: + bmi slide_to_note ; then A (signed) < NUM (signed) and BMI will branch + + ; equals case + tya ; y has NOTE_TONE_SLIDING_L + cmp note_a+NOTE_TONE_DELTA_L,X + bne check2 + lda note_a+NOTE_TONE_SLIDING_H,X + cmp note_a+NOTE_TONE_DELTA_H,X + beq slide_to_note + +check2: + lda note_a+NOTE_TONE_SLIDE_STEP_H,X + bmi no_tone_sliding ; ((a->tone_slide_step >= 0) && + + ; (a->tone_sliding >= a->tone_delta) + + ; 16 bit signed compare + tya ; y has NOTE_TONE_SLIDING_L + cmp note_a+NOTE_TONE_DELTA_L,X ; num1-num2 + lda note_a+NOTE_TONE_SLIDING_H,X + sbc note_a+NOTE_TONE_DELTA_H,X + bvc sc_loser2 ; N eor V + eor #$80 +sc_loser2: + bmi no_tone_sliding ; then A (signed) < NUM (signed) and BMI will branch + +slide_to_note: + ; a->note = a->slide_to_note; + lda note_a+NOTE_SLIDE_TO_NOTE,X + sta note_a+NOTE_NOTE,X + lda #0 + sta note_a+NOTE_TONE_SLIDE_COUNT,X + sta note_a+NOTE_TONE_SLIDING_L,X + sta note_a+NOTE_TONE_SLIDING_H,X + + +no_tone_sliding: + + ;========================= + ; Calculate the amplitude + ;========================= +calc_amplitude: + ; get base value from the sample (bottom 4 bits of sample_b1) + +sample_b1_smc: + lda #$d1 ; a->amplitude= (b1 & 0xf); + and #$f + + ;======================================== + ; if b0 top bit is set, it means sliding + + ; adjust amplitude sliding + + bit sample_b0_smc+1 ; if ((b0 & 0x80)!=0) { + bpl done_amp_sliding ; so if top bit not set, skip + tay + + ;================================ + ; if top bits 0b11 then slide up + ; if top bits 0b10 then slide down + + ; if ((b0 & 0x40)!=0) { + lda note_a+NOTE_AMPLITUDE_SLIDING,X + sec + bvc amp_slide_down + +amp_slide_up: + ; if (a->amplitude_sliding < 15) { + ; a pain to do signed compares + sbc #15 + bvc asu_signed + eor #$80 +asu_signed: + bpl done_amp_sliding ; skip if A>=15 + inc note_a+NOTE_AMPLITUDE_SLIDING,X ; a->amplitude_sliding++; + bne done_amp_sliding_y + +amp_slide_down: + ; if (a->amplitude_sliding > -15) { + ; a pain to do signed compares + sbc #$f1 ; -15 + bvc asd_signed + eor #$80 +asd_signed: + bmi done_amp_sliding ; if A < -15, skip subtract + + dec note_a+NOTE_AMPLITUDE_SLIDING,X ; a->amplitude_sliding--; + +done_amp_sliding_y: + tya + +done_amp_sliding: + + ; a->amplitude+=a->amplitude_sliding; + clc + adc note_a+NOTE_AMPLITUDE_SLIDING,X + + ; clamp amplitude to 0 - 15 + +check_amp_lo: + bmi write_clamp_amplitude + +check_amp_hi: + cmp #16 + bcc write_amplitude ; blt + lda #15 + .byte $2C +write_clamp_amplitude: + lda #0 +write_amplitude: + sta note_amp_smc+1 + +done_clamp_amplitude: + + ; We generate the proper table at runtime now + ; so always in Volume Table + ; a->amplitude = PT3VolumeTable_33_34[a->volume][a->amplitude]; + ; a->amplitude = PT3VolumeTable_35[a->volume][a->amplitude]; + + lda note_a+NOTE_VOLUME,X ; 4+ + asl ; 2 + asl ; 2 + asl ; 2 + asl ; 2 +note_amp_smc: + ora #$d1 ; 4+ + + tay ; 2 + lda VolumeTable,Y ; 4+ + sta note_a+NOTE_AMPLITUDE,X ; 5 + +done_table: + + +check_envelope_enable: + ; Bottom bit of b0 indicates our sample has envelope + ; Also make sure envelopes are enabled + + + ; if (((b0 & 0x1) == 0) && ( a->envelope_enabled)) { +sample_b0_smc: + lda #$d1 + lsr + tay + bcs envelope_slide + + lda note_a+NOTE_ENVELOPE_ENABLED,X + beq envelope_slide + + + ; Bit 4 of the per-channel AY-3-8910 amplitude specifies + ; envelope enabled + + lda note_a+NOTE_AMPLITUDE,X ; a->amplitude |= 16; + ora #$10 + sta note_a+NOTE_AMPLITUDE,X + + +envelope_slide: + + ; Envelope slide + ; If b1 top bits are 10 or 11 + + lda sample_b0_smc+1 + asl + asl + asl ; b0 bit 5 to carry flag + lda #$20 + bit sample_b1_smc+1 ; b1 bit 7 to sign flag, bit 5 to zero flag + php + bpl else_noise_slide ; if ((b1 & 0x80) != 0) { + tya + ora #$f0 + bcs envelope_slide_down ; if ((b0 & 0x20) == 0) { + +envelope_slide_up: + ; j = ((b0>>1)&0xF) + a->envelope_sliding; + and #$0f + clc + +envelope_slide_down: + + ; j = ((b0>>1)|0xF0) + a->envelope_sliding + adc note_a+NOTE_ENVELOPE_SLIDING,X + sta e_slide_amount_smc+1 ; j + +envelope_slide_done: + + plp + beq last_envelope ; if (( b1 & 0x20) != 0) { + + ; a->envelope_sliding = j; + sta note_a+NOTE_ENVELOPE_SLIDING,X + +last_envelope: + + ; pt3->envelope_add+=j; + + clc +e_slide_amount_smc: + lda #$d1 + adc pt3_envelope_add_smc+1 + sta pt3_envelope_add_smc+1 + + jmp noise_slide_done ; skip else + +else_noise_slide: + ; Noise slide + ; else { + + ; pt3->noise_add = (b0>>1) + a->noise_sliding; + tya + clc + adc note_a+NOTE_NOISE_SLIDING,X + sta pt3_noise_add_smc+1 + + plp + beq noise_slide_done ; if ((b1 & 0x20) != 0) { + + ; noise_sliding = pt3_noise_add + sta note_a+NOTE_NOISE_SLIDING,X + +noise_slide_done: + ;====================== + ; set mixer + + lda sample_b1_smc+1 ; pt3->mixer_value = ((b1 >>1) & 0x48) | pt3->mixer_value; + lsr + and #$48 + + ora PT3_MIXER_VAL ; 3 + sta PT3_MIXER_VAL ; 3 + + + ;======================== + ; increment sample position + + inc note_a+NOTE_SAMPLE_POSITION,X ; a->sample_position++; + + lda note_a+NOTE_SAMPLE_POSITION,X + cmp note_a+NOTE_SAMPLE_LENGTH,X + + bcc sample_pos_ok ; blt + + lda note_a+NOTE_SAMPLE_LOOP,X + sta note_a+NOTE_SAMPLE_POSITION,X + +sample_pos_ok: + + ;======================== + ; increment ornament position + + inc note_a+NOTE_ORNAMENT_POSITION,X ; a->ornament_position++; + lda note_a+NOTE_ORNAMENT_POSITION,X + cmp note_a+NOTE_ORNAMENT_LENGTH,X + + bcc ornament_pos_ok ; blt + + lda note_a+NOTE_ORNAMENT_LOOP,X + sta note_a+NOTE_ORNAMENT_POSITION,X +ornament_pos_ok: + + +done_note: + ; set mixer value + ; this is a bit complex (from original code) + ; after 3 calls it is set up properly + lsr PT3_MIXER_VAL + +handle_onoff: + ldy note_a+NOTE_ONOFF,X ;if (a->onoff>0) { + beq done_onoff + + dey ; a->onoff--; + + bne put_offon ; if (a->onoff==0) { + lda note_a+NOTE_ENABLED,X + eor #$1 ; toggle note_enabled + sta note_a+NOTE_ENABLED,X + + beq do_offon +do_onoff: + ldy note_a+NOTE_ONOFF_DELAY,X ; if (a->enabled) a->onoff=a->onoff_delay; + jmp put_offon +do_offon: + ldy note_a+NOTE_OFFON_DELAY,X ; else a->onoff=a->offon_delay; +put_offon: +.ifdef PT3_USE_ZERO_PAGE + sty note_a+NOTE_ONOFF,X +.else + lda note_a+NOTE_ONOFF,X + tay +.endif + +done_onoff: + + rts ; 6 + + + + + + + ;===================================== + ; Decode Note + ;===================================== + ; X points to the note offset + + ; Note! These timings are out of date (FIXME) + ; Timings (from ===>) + ; 00: 14+30 + ; 0X: 14+15 + ; 10: 14+5 +124 + ; 1X: 14+5 +193 + ; 2X/3X: 14+5 +17 + ; 4X: 14+5+5 + 111 + ; 5X-BX: 14+5+5+ 102 + ; CX: + ; DX/EX: + ; FX: + +stop_decoding: + + ; we are still running, decrement and early return + dec note_a+NOTE_LEN_COUNT,X ; 7 + rts ; 6 + + ;===================================== + ; Decode Line + ;===================================== + +pt3_decode_line: + ; decode_note(&pt3->a,&(pt3->a_addr),pt3); + ldx #(NOTE_STRUCT_SIZE*0) + jsr decode_note + + ; decode_note(&pt3->b,&(pt3->b_addr),pt3); + ldx #(NOTE_STRUCT_SIZE*1) + jsr decode_note + + ; decode_note(&pt3->c,&(pt3->c_addr),pt3); + ldx #(NOTE_STRUCT_SIZE*2) + ;;jsr decode_note ; fall through + +; if (pt3->a.all_done && pt3->b.all_done && pt3->c.all_done) { +; return 1; +; } + +decode_note: + + ; Init vars + + ldy #0 ; 2 + sty spec_command_smc+1 ; 4 + + ; Skip decode if note still running + lda note_a+NOTE_LEN_COUNT,X ; 4+ + cmp #2 ; 2 + bcs stop_decoding ; blt, assume not negative ; 2/3 + +keep_decoding: + + lda note_a+NOTE_NOTE,X ; store prev note ; 4+ + sta prev_note_smc+1 ; 4 + + lda note_a+NOTE_TONE_SLIDING_H,X ; store prev sliding ; 4+ + sta prev_sliding_h_smc+1 ; 4 + lda note_a+NOTE_TONE_SLIDING_L,X ; 4+ + sta prev_sliding_l_smc+1 ; 4 + + + ;============ + ; 24 + +note_decode_loop: + lda note_a+NOTE_LEN,X ; re-up length count ; 4+ + sta note_a+NOTE_LEN_COUNT,X ; 5 + + lda note_a+NOTE_ADDR_L,X ; 4+ + sta PATTERN_L ; 3 + lda note_a+NOTE_ADDR_H,X ; 4+ + sta PATTERN_H ; 3 +;===> + ; get next value + lda (PATTERN_L),Y ; 5+ + sta note_command_smc+1 ; save termporarily ; 4 + and #$0f ; 2 + sta note_command_bottom_smc+1 ; 4 + +note_command_smc: + lda #$d1 ; 2 + + ; FIXME: use a jump table?? + ; further reflection, that would require 32-bytes of addresses + ; in addition to needing X or Y to index the jump table. hmmm + + and #$f0 ; 2 + + ; cmp #$00 + bne decode_case_1X ; 2/3 + ;============= + ; 14 + +decode_case_0X: + ;============================== + ; $0X set special effect + ;============================== + ; -1 +note_command_bottom_smc: + lda #$d1 ; 2 + + ; we can always store spec as 0 means no spec + + ; FIXME: what if multiple spec commands? + ; Doesn't seem to happen in practice + ; But AY_emul has code to handle it + + sta spec_command_smc+1 ; 4 + + bne decode_case_0X_not_zero ; 2/3 + ;============= + ; 8 + ; 00 case + ; means end of pattern + ; -1 + sta note_a+NOTE_LEN_COUNT,X ; len_count=0; ; 5 + + dec pt3_pattern_done_smc+1 ; 6 + + jmp note_done_decoding ; 3 + +decode_case_1X: + ;============================== + ; $1X -- Set Envelope Type + ;============================== + + cmp #$10 ; 2 + bne decode_case_2X ; 2/3 + ;============ + ; 5 + + ; -1 + lda note_command_bottom_smc+1 ; 4 + bne decode_case_not_10 ; 3 + +decode_case_10: + ; 10 case - disable ; -1 + sta note_a+NOTE_ENVELOPE_ENABLED,X ; A is 0 ; 5 + beq decode_case_1x_common ; branch always ; 3 + +decode_case_not_10: + ; -1 + jsr set_envelope ; 6+64 + +decode_case_1x_common: + + iny ; 2 + lda (PATTERN_L),Y ; 5+ + lsr ; 2 + jsr load_sample ; 6+86 + + lda #0 ; 2 + sta note_a+NOTE_ORNAMENT_POSITION,X ; ornament_position=0 ; 5 + +decode_case_0X_not_zero: + + jmp done_decode_loop ; 3 + +decode_case_2X: +decode_case_3X: + ;============================== + ; $2X/$3X set noise period + ;============================== + + cmp #$40 ; 2 + bcs decode_case_4X ; branch greater/equal ; 3 + ; -1 + lda note_command_smc+1 ; 4 + adc #$e0 ; same as subtract $20 ; 2 + sta pt3_noise_period_smc+1 ; 3 + + jmp done_decode_loop ; 3 + ;=========== + ; 16 + +decode_case_4X: + ;============================== + ; $4X -- set ornament + ;============================== +; cmp #$40 ; already set ; + bne decode_case_5X ; 3 + ; -1 + lda note_command_bottom_smc+1; set ornament to bottom nibble; 4 + jsr load_ornament ; 6+93 + + jmp done_decode_loop ; 3 + ;============ + ; 110 + +decode_case_5X: + ;============================== + ; $5X-$AX set note + ;============================== + cmp #$B0 ; 2 + bcs decode_case_bX ; branch greater/equal ; 3 + + ; -1 + lda note_command_smc+1 ; 4 + adc #$b0 ; 2 + sta note_a+NOTE_NOTE,X ; note=(current_val-0x50); ; 5 + + jsr reset_note ; 6+69 + + lda #1 ; 2 + sta note_a+NOTE_ENABLED,X ; enabled=1 ; 5 + + + bne note_done_decoding ; 3 + +decode_case_bX: + ;============================================ + ; $BX -- note length or envelope manipulation + ;============================================ +; cmp #$b0 ; already set from before + bne decode_case_cX ; 3 + ; -1 + lda note_command_bottom_smc+1 ; 4 + beq decode_case_b0 ; 3 + ; -1 + sbc #1 ; envelope_type=(current_val&0xf)-1; ; 2 + bne decode_case_bx_higher ; 3 + +decode_case_b1: + ; Set Length + + ; get next byte + iny ; 2 + lda (PATTERN_L),Y ; 5 + + sta note_a+NOTE_LEN,X ; 5 + sta note_a+NOTE_LEN_COUNT,X ; 5 + bcs done_decode_loop ; branch always ; 3 + +decode_case_b0: + ; Disable envelope + sta note_a+NOTE_ENVELOPE_ENABLED,X ; 5 + sta note_a+NOTE_ORNAMENT_POSITION,X ; 5 + beq done_decode_loop ; 3 + + +decode_case_bx_higher: + + jsr set_envelope ; 6+64 + + bcs done_decode_loop ; branch always ; 3 + +decode_case_cX: + ;============================== + ; $CX -- set volume + ;============================== + cmp #$c0 ; check top nibble $C ; 2 + bne decode_case_dX ; 3 + ; -1 + lda note_command_bottom_smc+1 ; 4 + bne decode_case_cx_not_c0 ; 3 + ; -1 +decode_case_c0: + ; special case $C0 means shut down the note + + sta note_a+NOTE_ENABLED,X ; enabled=0 ; 5 + + jsr reset_note ; 6+69 + + beq note_done_decoding ; branch always ; 3 + +decode_case_cx_not_c0: + sta note_a+NOTE_VOLUME,X ; volume=current_val&0xf; 5 + bne done_decode_loop ; branch always ; 3 + +decode_case_dX: + ;============================== + ; $DX/$EX -- change sample + ;============================== + ; D0 = special case (end note) + ; D1-EF = set sample to (value - $D0) + + cmp #$f0 ; check top nibble $D/$E ; 2 + beq decode_case_fX ; 3 + ; -1 + + lda note_command_smc+1 ; 4 + sec ; 2 + sbc #$d0 ; 2 + beq note_done_decoding ; 3 + +decode_case_not_d0: + ; -1 + + jsr load_sample ; load sample in bottom nybble ; 6+?? + + bcc done_decode_loop; branch always ; 3 + + ;======================== + ; d0 case means end note +;decode_case_d0: +; jmp note_done_decoding + + + ;============================== + ; $FX - change ornament/sample + ;============================== +decode_case_fX: + ; disable envelope + lda #0 ; 2 + sta note_a+NOTE_ENVELOPE_ENABLED,X ; 5 + + ; Set ornament to low byte of command + lda note_command_bottom_smc+1 ; 4 + jsr load_ornament ; ornament to load in A ; 6+? + + ; Get next byte + iny ; point to next byte ; 2 + lda (PATTERN_L),Y ; 5 + + ; Set sample to value/2 + lsr ; divide by two ; 2 + jsr load_sample ; sample to load in A ; 6+? + + ; fallthrough + +done_decode_loop: + + iny ; point to next byte ; 2 + + jmp note_decode_loop ; 3 + +note_done_decoding: + + iny ; point to next byte ; 2 + + ;================================= + ; handle effects + ;================================= + ; Note, the AYemul code has code to make sure these are applied + ; In the same order they appear. We don't bother? +handle_effects: + +spec_command_smc: + lda #$d1 ; 2 + + ;============================== + ; Effect #1 -- Tone Down + ;============================== +effect_1: + cmp #$1 ; 2 + bne effect_2 ; 3 + ; -1 + sta note_a+NOTE_SIMPLE_GLISS,X ; 5 + lsr ; 2 + sta note_a+NOTE_ONOFF,X ; 5 + + lda (PATTERN_L),Y ; load byte, set as slide delay ; 5 + iny ; 2 + + sta note_a+NOTE_TONE_SLIDE_DELAY,X ; 5 + sta note_a+NOTE_TONE_SLIDE_COUNT,X ; 5 + + lda (PATTERN_L),Y ; load byte, set as slide step low ; 5 + iny ; 2 + sta note_a+NOTE_TONE_SLIDE_STEP_L,X ; 5 + + lda (PATTERN_L),Y ; load byte, set as slide step high ; 5 + iny ; 2 + sta note_a+NOTE_TONE_SLIDE_STEP_H,X ; 5 + + jmp no_effect ; 3 + + ;============================== + ; Effect #2 -- Portamento + ;============================== +effect_2: + cmp #$2 ; 2 + beq effect_2_small ; 3 + ; -1 + jmp effect_3 ; 3 +effect_2_small: ; FIXME: make smaller + lda #0 ; 2 + sta note_a+NOTE_SIMPLE_GLISS,X ; 5 + sta note_a+NOTE_ONOFF,X ; 5 + + lda (PATTERN_L),Y ; load byte, set as delay ; 5 + iny ; 2 + + sta note_a+NOTE_TONE_SLIDE_DELAY,X ; 5 + sta note_a+NOTE_TONE_SLIDE_COUNT,X ; 5 + + iny ; 2 + iny ; 2 + iny ; 2 + + lda (PATTERN_L),Y ; load byte, set as slide_step high ; 5 + php ; 3 + + ; 16-bit absolute value + bpl slide_step_positive1 ; 3 + ;-1 + eor #$ff ; 2 + +slide_step_positive1: + sta note_a+NOTE_TONE_SLIDE_STEP_H,X ; 5 + dey ; 2 + lda (PATTERN_L),Y ; load byte, set as slide_step low ; 5 + plp ; 4 + clc ; 2 + bpl slide_step_positive2 ; 3 + ;-1 + eor #$ff ; 2 + sec ; 2 + +slide_step_positive2: + adc #$0 ; 2 + sta note_a+NOTE_TONE_SLIDE_STEP_L,X ; 5 + bcc skip_step_inc1 ; 3 + inc note_a+NOTE_TONE_SLIDE_STEP_H,X ; 7 +skip_step_inc1: + + + iny ; moved here as it messed with flags ; 2 + iny ; 2 + + +; a->tone_delta=GetNoteFreq(a->note,pt3)- +; GetNoteFreq(prev_note,pt3); + + sty PT3_TEMP ; save Y +prev_note_smc: + ldy #$d1 + lda NoteTable_low,Y ; GetNoteFreq + sta temp_word_l2_smc+1 + lda NoteTable_high,Y ; GetNoteFreq + sta temp_word_h2_smc+1 + + ldy note_a+NOTE_NOTE,X + lda NoteTable_low,Y ; GetNoteFreq + + sec +temp_word_l2_smc: + sbc #$d1 + sta note_a+NOTE_TONE_DELTA_L,X + lda NoteTable_high,Y ; GetNoteFreq +temp_word_h2_smc: + sbc #$d1 + sta note_a+NOTE_TONE_DELTA_H,X + + ; a->slide_to_note=a->note; + lda note_a+NOTE_NOTE,X + sta note_a+NOTE_SLIDE_TO_NOTE,X + + ldy PT3_TEMP ; restore Y + + ; a->note=prev_note; + lda prev_note_smc+1 + sta note_a+NOTE_NOTE,X + + ; implement file version 6 and above slide behavior + ; this is done by SMC at song init time +version_smc: + jmp weird_version ; (JMP to BIT via smc) ; 3 + +prev_sliding_l_smc: + lda #$d1 + sta note_a+NOTE_TONE_SLIDING_L,X +prev_sliding_h_smc: + lda #$d1 + sta note_a+NOTE_TONE_SLIDING_H,X + +weird_version: + + ; annoying 16-bit subtract, only care if negative + ; if ((a->tone_delta - a->tone_sliding) < 0) { + sec + lda note_a+NOTE_TONE_DELTA_L,X + sbc note_a+NOTE_TONE_SLIDING_L,X + lda note_a+NOTE_TONE_DELTA_H,X + sbc note_a+NOTE_TONE_SLIDING_H,X + bpl no_effect + + ; a->tone_slide_step = -a->tone_slide_step; + + lda note_a+NOTE_TONE_SLIDE_STEP_L,X + eor #$ff + clc + adc #$1 + sta note_a+NOTE_TONE_SLIDE_STEP_L,X + lda note_a+NOTE_TONE_SLIDE_STEP_H,X + eor #$ff + adc #$0 + sta note_a+NOTE_TONE_SLIDE_STEP_H,X + + jmp no_effect + + ;============================== + ; Effect #3 -- Sample Position + ;============================== +effect_3: + cmp #$3 + bne effect_4 + + lda (PATTERN_L),Y ; load byte, set as sample position + iny + sta note_a+NOTE_SAMPLE_POSITION,X + + bne no_effect ; branch always + + ;============================== + ; Effect #4 -- Ornament Position + ;============================== +effect_4: + cmp #$4 + bne effect_5 + + lda (PATTERN_L),Y ; load byte, set as ornament position + iny + sta note_a+NOTE_ORNAMENT_POSITION,X + + bne no_effect ; branch always + + ;============================== + ; Effect #5 -- Vibrato + ;============================== +effect_5: + cmp #$5 + bne effect_8 + + lda (PATTERN_L),Y ; load byte, set as onoff delay + iny + sta note_a+NOTE_ONOFF_DELAY,X + sta note_a+NOTE_ONOFF,X + + lda (PATTERN_L),Y ; load byte, set as offon delay + iny + sta note_a+NOTE_OFFON_DELAY,X + + lda #0 + sta note_a+NOTE_TONE_SLIDE_COUNT,X + sta note_a+NOTE_TONE_SLIDING_L,X + sta note_a+NOTE_TONE_SLIDING_H,X + + beq no_effect ; branch always + + ;============================== + ; Effect #8 -- Envelope Down + ;============================== +effect_8: + cmp #$8 + bne effect_9 + + ; delay + lda (PATTERN_L),Y ; load byte, set as speed + iny + sta pt3_envelope_delay_smc+1 + sta pt3_envelope_delay_orig_smc+1 + + ; low value + lda (PATTERN_L),Y ; load byte, set as low + iny + sta pt3_envelope_slide_add_l_smc+1 + + ; high value + lda (PATTERN_L),Y ; load byte, set as high + iny + sta pt3_envelope_slide_add_h_smc+1 + + bne no_effect ; branch always + + ;============================== + ; Effect #9 -- Set Speed + ;============================== +effect_9: + cmp #$9 + bne no_effect + + lda (PATTERN_L),Y ; load byte, set as speed + iny + sta pt3_speed_smc+1 + +no_effect: + + ;================================ + ; add y into the address pointer + + clc + tya + adc note_a+NOTE_ADDR_L,X + sta note_a+NOTE_ADDR_L,X + lda #0 + adc note_a+NOTE_ADDR_H,X + sta note_a+NOTE_ADDR_H,X + sta PATTERN_H + + rts + + + ;======================================= + ; Set Envelope + ;======================================= + ; pulls out common code from $1X and $BX + ; commands + + ; A = new envelope type + +set_envelope: + + sta pt3_envelope_type_smc+1 ; 4 + +; give fake old to force update? maybe only needed if printing? +; pt3->envelope_type_old=0x78; + + lda #$78 ; 2 + sta pt3_envelope_type_old_smc+1 ; 4 + + ; get next byte + iny ; 2 + lda (PATTERN_L),Y ; 5+ + sta pt3_envelope_period_h_smc+1 ; 4 + + iny ; 2 + lda (PATTERN_L),Y ; 5+ + sta pt3_envelope_period_l_smc+1 ; 4 + + lda #1 ; 2 + sta note_a+NOTE_ENVELOPE_ENABLED,X ; envelope_enabled=1 ; 5 + lsr ; 2 + sta note_a+NOTE_ORNAMENT_POSITION,X ; ornament_position=0 ; 5 + sta pt3_envelope_delay_smc+1 ; envelope_delay=0 ; 4 + sta pt3_envelope_slide_l_smc+1 ; envelope_slide=0 ; 4 + sta pt3_envelope_slide_h_smc+1 ; 4 + + rts ; 6 + ;=========== + ; 64 + + ;======================== + ; reset note + ;======================== + ; common code from the decode note code + +reset_note: + lda #0 ; 2 + sta note_a+NOTE_SAMPLE_POSITION,X ; sample_position=0 ; 5 + sta note_a+NOTE_AMPLITUDE_SLIDING,X ; amplitude_sliding=0 ; 5 + sta note_a+NOTE_NOISE_SLIDING,X ; noise_sliding=0 ; 5 + sta note_a+NOTE_ENVELOPE_SLIDING,X ; envelope_sliding=0 ; 5 + sta note_a+NOTE_ORNAMENT_POSITION,X ; ornament_position=0 ; 5 + sta note_a+NOTE_TONE_SLIDE_COUNT,X ; tone_slide_count=0 ; 5 + sta note_a+NOTE_TONE_SLIDING_L,X ; tone_sliding=0 ; 5 + sta note_a+NOTE_TONE_SLIDING_H,X ; 5 + sta note_a+NOTE_TONE_ACCUMULATOR_L,X ; tone_accumulator=0 ; 5 + sta note_a+NOTE_TONE_ACCUMULATOR_H,X ; 5 + sta note_a+NOTE_ONOFF,X ; onoff=0; ; 5 + + rts ; 6 + ;============ + ; 69 + + + + + + + ;===================================== + ; Set Pattern + ;===================================== + ; FIXME: inline this? we do call it from outside + ; in the player note length code + +is_done: + ; done with song, set it to non-zero + sta DONE_SONG ; 3 + rts ; 6 + +pt3_set_pattern: + + ; Lookup current pattern in pattern table +current_pattern_smc: + ldy #$d1 ; 2 + lda PT3_LOC+PT3_PATTERN_TABLE,Y ; 4+ + + ; if value is $FF we are at the end of the song + cmp #$ff ; 2 + beq is_done ; 2/3 + + ;============ + ; 20 if end + +not_done: + + ; set up the three pattern address pointers + + asl ; mul pattern offset by two, as word sized ; 2 + tay ; 2 + + ; point PATTERN_H/PATTERN_L to the pattern address table + + clc ; 2 + lda PT3_LOC+PT3_PATTERN_LOC_L ; 4 + sta PATTERN_L ; 3 + lda PT3_LOC+PT3_PATTERN_LOC_H ; 4 + adc #>PT3_LOC ; assume page boundary ; 2 + sta PATTERN_H ; 3 + + ; First 16-bits points to the Channel A address + lda (PATTERN_L),Y ; 5+ + sta note_a+NOTE_ADDR_L ; 4 + iny ; 2 + lda (PATTERN_L),Y ; 5+ + adc #>PT3_LOC ; assume page boundary ; 2 + sta note_a+NOTE_ADDR_H ; 4 + iny ; 2 + + ; Next 16-bits points to the Channel B address + lda (PATTERN_L),Y ; 5+ + sta note_b+NOTE_ADDR_L ; 4 + iny ; 2 + lda (PATTERN_L),Y ; 5+ + adc #>PT3_LOC ; assume page boundary ; 2 + sta note_b+NOTE_ADDR_H ; 4 + iny ; 2 + + ; Next 16-bits points to the Channel C address + lda (PATTERN_L),Y ; 5+ + sta note_c+NOTE_ADDR_L ; 4 + iny ; 2 + lda (PATTERN_L),Y ; 5+ + adc #>PT3_LOC ; assume page boundary ; 2 + sta note_c+NOTE_ADDR_H ; 4 + + ; clear out the noise channel + lda #0 ; 2 + sta pt3_noise_period_smc+1 ; 4 + + ; Set all three channels as active + ; FIXME: num_channels, may need to be 6 if doing 6-channel pt3? + lda #3 ; 2 + sta pt3_pattern_done_smc+1 ; 4 + + rts ; 6 + + + + ;===================================== + ; pt3 make frame + ;===================================== + ; update pattern or line if necessary + ; then calculate the values for the next frame + + ;========================== + ; pattern done early! + +early_end: + inc current_pattern_smc+1 ; increment pattern ; 6 + sta current_line_smc+1 ; 4 + sta current_subframe_smc+1 ; 4 + +check_subframe: + lda current_subframe_smc+1 ; 4 + bne pattern_good ; 2/3 + + ; load a new pattern in + jsr pt3_set_pattern ;6+? + + lda DONE_SONG ; 3 + beq pattern_good ; 2/3 + rts ; 6 + +pt3_make_frame: + + ; see if we need a new pattern + ; we do if line==0 and subframe==0 + ; allow fallthrough where possible +current_line_smc: + lda #$d1 ; 2 + beq check_subframe ; 2/3 + +pattern_good: + + ; see if we need a new line + +current_subframe_smc: + lda #$d1 ; 2 + bne line_good ; 2/3 + + ; decode a new line + jsr pt3_decode_line ; 6+? + + ; check if pattern done early +pt3_pattern_done_smc: + lda #$d1 ; 2 + beq early_end ; 2/3 + +line_good: + + ; Increment everything + + inc current_subframe_smc+1 ; subframe++ ; 6 + lda current_subframe_smc+1 ; 4 + + ; if we hit pt3_speed, move to next +pt3_speed_smc: + eor #$d1 ; 2 + bne do_frame ; 2/3 + +next_line: + sta current_subframe_smc+1 ; reset subframe to 0 ; 4 + + inc current_line_smc+1 ; and increment line ; 6 + lda current_line_smc+1 ; 4 + + eor #64 ; always end at 64. ; 2 + bne do_frame ; is this always needed? ; 2/3 + +next_pattern: + sta current_line_smc+1 ; reset line to 0 ; 4 + + inc current_pattern_smc+1 ; increment pattern ; 6 + +do_frame: + ; AY-3-8910 register summary + ; + ; R0/R1 = A period low/high + ; R2/R3 = B period low/high + ; R4/R5 = C period low/high + ; R6 = Noise period + ; R7 = Enable XX Noise=!CBA Tone=!CBA + ; R8/R9/R10 = Channel A/B/C amplitude M3210, M=envelope enable + ; R11/R12 = Envelope Period low/high + ; R13 = Envelope Shape, 0xff means don't write + ; R14/R15 = I/O (ignored) + + ldx #0 ; needed ; 2 + stx PT3_MIXER_VAL ; 3 + stx pt3_envelope_add_smc+1 ; 4 + + ;;ldx #(NOTE_STRUCT_SIZE*0) ; Note A ; 2 + jsr calculate_note ; 6+? + ldx #(NOTE_STRUCT_SIZE*1) ; Note B ; 2 + jsr calculate_note ; 6+? + ldx #(NOTE_STRUCT_SIZE*2) ; Note C ; 2 + jsr calculate_note ; 6+? + +convert_177_smc1: + sec ; 2 + + ; Load up the Frequency Registers + + lda note_a+NOTE_TONE_L ; Note A Period L ; 4 + sta AY_REGISTERS+0 ; into R0 ; 3 + + lda note_a+NOTE_TONE_H ; Note A Period H ; 4 + sta AY_REGISTERS+1 ; into R1 ; 3 + lda note_a+NOTE_TONE_L ; Note A Period L ; 4 + bcc no_scale_a ; 2/3 + + ; Convert from 1.77MHz to 1MHz by multiplying by 9/16 + + ; conversion costs 100 cycles! + + ; first multiply by 8 + asl ; 2 + rol AY_REGISTERS+1 ; 5 + asl ; 2 + rol AY_REGISTERS+1 ; 5 + asl ; 2 + rol AY_REGISTERS+1 ; 5 + + ; add in original to get 9 + clc ; 2 + adc note_a+NOTE_TONE_L ; 4 + sta AY_REGISTERS+0 ; 3 + lda note_a+NOTE_TONE_H ; 4 + adc AY_REGISTERS+1 ; 3 + + ; divide by 16 to get proper value + ror ; 2 + ror AY_REGISTERS+0 ; 5 + ror ; 2 + ror AY_REGISTERS+0 ; 5 + ror ; 2 + ror AY_REGISTERS+0 ; 5 + ror ; 2 + ror AY_REGISTERS+0 ; 5 + and #$0f ; 2 + sta AY_REGISTERS+1 ; 3 + +no_scale_a: + +convert_177_smc2: + sec ; 2 + + lda note_b+NOTE_TONE_L ; Note B Period L ; 4 + sta AY_REGISTERS+2 ; into R2 ; 3 + + lda note_b+NOTE_TONE_H ; Note B Period H ; 4 + sta AY_REGISTERS+3 ; into R3 ; 3 + lda note_b+NOTE_TONE_L ; Note B Period L ; 4 + bcc no_scale_b ; 2/3 + + ; Convert from 1.77MHz to 1MHz by multiplying by 9/16 + + ; first multiply by 8 + asl ; 2 + rol AY_REGISTERS+3 ; 5 + asl ; 2 + rol AY_REGISTERS+3 ; 5 + asl ; 2 + rol AY_REGISTERS+3 ; 5 + + ; add in original to get 9 + clc ; 2 + adc note_b+NOTE_TONE_L ; 4 + sta AY_REGISTERS+2 ; 3 + lda note_b+NOTE_TONE_H ; 4 + adc AY_REGISTERS+3 ; 3 + + ; divide by 16 to get proper value + ror ; 2 + ror AY_REGISTERS+2 ; 5 + ror ; 2 + ror AY_REGISTERS+2 ; 5 + ror ; 2 + ror AY_REGISTERS+2 ; 5 + ror ; 2 + ror AY_REGISTERS+2 ; 5 + and #$0f ; 2 + sta AY_REGISTERS+3 ; 3 + +no_scale_b: + +convert_177_smc3: + sec ; 2 + + lda note_c+NOTE_TONE_L ; Note C Period L ; 4 + sta AY_REGISTERS+4 ; into R4 ; 3 + lda note_c+NOTE_TONE_H ; Note C Period H ; 4 + sta AY_REGISTERS+5 ; into R5 ; 3 + lda note_c+NOTE_TONE_L ; Note C Period L ; 4 + bcc no_scale_c ; 2/3 + + ; Convert from 1.77MHz to 1MHz by multiplying by 9/16 + + ; first multiply by 8 + asl ; 2 + rol AY_REGISTERS+5 ; 5 + asl ; 2 + rol AY_REGISTERS+5 ; 5 + asl ; 2 + rol AY_REGISTERS+5 ; 5 + + ; add in original to get 9 + clc ; 2 + adc note_c+NOTE_TONE_L ; 4 + sta AY_REGISTERS+4 ; 3 + lda note_c+NOTE_TONE_H ; 4 + adc AY_REGISTERS+5 ; 3 + + ; divide by 16 to get proper value + ror ; 2 + ror AY_REGISTERS+4 ; 5 + ror ; 2 + ror AY_REGISTERS+4 ; 5 + ror ; 2 + ror AY_REGISTERS+4 ; 5 + ror ; 2 + ror AY_REGISTERS+4 ; 5 + and #$0f ; 2 + sta AY_REGISTERS+5 ; 3 + +no_scale_c: + + + ; Noise + ; frame[6]= (pt3->noise_period+pt3->noise_add)&0x1f; + clc ; 2 +pt3_noise_period_smc: + lda #$d1 ; 2 +pt3_noise_add_smc: + adc #$d1 ; 2 + and #$1f ; 2 + sta AY_REGISTERS+6 ; 3 + +convert_177_smc4: + sec ; 2 + bcc no_scale_n ; 2/3 + + ; Convert from 1.77MHz to 1MHz by multiplying by 9/16 + + ; first multiply by 8 + asl ; 2 + asl ; 2 + asl ; 2 + + ; add in original to get 9 + adc AY_REGISTERS+6 ; 3 + + ; divide by 16 to get proper value + ror ; 2 + ror ; 2 + ror ; 2 + ror ; 2 + and #$1f ; 2 + +no_scale_n: + sta AY_REGISTERS+6 ; 3 + + ;======================= + ; Mixer + + ; PT3_MIXER_VAL is already in AY_REGISTERS+7 + + ;======================= + ; Amplitudes + + lda note_a+NOTE_AMPLITUDE ; 3 + sta AY_REGISTERS+8 ; 3 + lda note_b+NOTE_AMPLITUDE ; 3 + sta AY_REGISTERS+9 ; 3 + lda note_c+NOTE_AMPLITUDE ; 3 + sta AY_REGISTERS+10 ; 3 + + ;====================================== + ; Envelope period + ; result=period+add+slide (16-bits) + clc ; 2 +pt3_envelope_period_l_smc: + lda #$d1 ; 2 +pt3_envelope_add_smc: + adc #$d1 ; 2 + tay ; 2 +pt3_envelope_period_h_smc: + lda #$d1 ; 2 + adc #0 ; 2 + tax ; 2 + + clc ; 2 + tya ; 2 +pt3_envelope_slide_l_smc: + adc #$d1 ; 2 + sta AY_REGISTERS+11 ; 3 + txa ; 2 +pt3_envelope_slide_h_smc: + adc #$d1 ; 2 + sta AY_REGISTERS+12 ; 3 + +convert_177_smc5: + sec + bcc no_scale_e ; 2/3 + + ; Convert from 1.77MHz to 1MHz by multiplying by 9/16 + + tay ; 2 + ; first multiply by 8 + lda AY_REGISTERS+11 ; 3 + asl ; 2 + rol AY_REGISTERS+12 ; 5 + asl ; 2 + rol AY_REGISTERS+12 ; 5 + asl ; 2 + rol AY_REGISTERS+12 ; 5 + + ; add in original to get 9 + clc ; 2 + adc AY_REGISTERS+11 ; 3 + sta AY_REGISTERS+11 ; 3 + tya ; 2 + adc AY_REGISTERS+12 ; 3 + + ; divide by 16 to get proper value + ror ; 2 + ror AY_REGISTERS+11 ; 5 + ror ; 2 + ror AY_REGISTERS+11 ; 5 + ror ; 2 + ror AY_REGISTERS+11 ; 5 + ror ; 2 + ror AY_REGISTERS+11 ; 5 + and #$0f ; 2 + sta AY_REGISTERS+12 ; 3 + +no_scale_e: + + ;======================== + ; Envelope shape + +pt3_envelope_type_smc: + lda #$d1 ; 2 +pt3_envelope_type_old_smc: + cmp #$d1 ; 2 + sta pt3_envelope_type_old_smc+1; copy old to new ; 4 + bne envelope_diff ; 2/3 +envelope_same: + lda #$ff ; if same, store $ff ; 2 +envelope_diff: + sta AY_REGISTERS+13 ; 3 + + + + ;============================== + ; end-of-frame envelope update + ;============================== + +pt3_envelope_delay_smc: + lda #$d1 ; 2 + beq done_do_frame ; assume can't be negative? ; 2/3 + ; do this if envelope_delay>0 + dec pt3_envelope_delay_smc+1 ; 6 + bne done_do_frame ; 2/3 + ; only do if we hit 0 +pt3_envelope_delay_orig_smc: + lda #$d1 ; reset envelope delay ; 2 + sta pt3_envelope_delay_smc+1 ; 4 + + clc ; 16-bit add ; 2 + lda pt3_envelope_slide_l_smc+1 ; 4 +pt3_envelope_slide_add_l_smc: + adc #$d1 ; 2 + sta pt3_envelope_slide_l_smc+1 ; 4 + lda pt3_envelope_slide_h_smc+1 ; 4 +pt3_envelope_slide_add_h_smc: + adc #$d1 ; 2 + sta pt3_envelope_slide_h_smc+1 ; 4 + +done_do_frame: + + rts ; 6 + + +; note, you might have slightly better performance if these are aligned +; so that loads don't have to cross page boundaries + +NoteTable_high: + .res 96,0 +NoteTable_low: + .res 96,0 + +VolumeTable: + .res 256,0 + + +pt3_lib_end: diff --git a/music/zero_wing/pt3_lib_detect_model.s b/music/zero_wing/pt3_lib_detect_model.s new file mode 100644 index 00000000..31c1b8dc --- /dev/null +++ b/music/zero_wing/pt3_lib_detect_model.s @@ -0,0 +1,63 @@ + ;=========================== + ; Check Apple II model + ;=========================== + ; this is mostly for IIc support + ; as it does interrupts differently + + ; ' ' ($20) = Apple II + ; '+' ($2B) = Apple II+ + ; 'E' ($45) = Apple IIe + ; 'C' ($43) = Apple IIc + ; 'G' ($47) = Apple IIgs + + +detect_appleii_model: + lda #' ' + + ldx $FBB3 + ; II is $38 + ; J-plus is $C9 + ; II+ is $EA (so is III) + ; IIe and newer is $06 + + cpx #$38 + beq done_apple_detect + + lda #'+' + cpx #$EA + beq done_apple_detect + + ; TODO: check for J-plus or III? + + cpx #$06 + bne done_apple_detect + +apple_iie_or_newer: + + + + ldx $FBC0 ; $EA on a IIe + ; $E0 on a IIe enhanced + ; $00 on a IIc/IIc+ + + ; $FE1F = $60, IIgs + + beq apple_iic + + lda #'E' + cpx #$EA + beq done_apple_detect + cpx #$E0 + beq done_apple_detect + + ; assume GS? + + lda #'G' + bne done_apple_detect + +apple_iic: + lda #'C' + +done_apple_detect: + sta APPLEII_MODEL + rts diff --git a/music/zero_wing/pt3_lib_init.s b/music/zero_wing/pt3_lib_init.s new file mode 100644 index 00000000..037b1ade --- /dev/null +++ b/music/zero_wing/pt3_lib_init.s @@ -0,0 +1,575 @@ +; pt3_lib_init.s + +; Initialize a song + +; this is done before song starts playing so it is not +; as performance / timing critical + + ;==================================== + ; pt3_init_song + ;==================================== + ; +pt3_init_song: + + lda #$0 + sta DONE_SONG ; 3 + ldx #(end_vars-begin_vars) +zero_song_structs_loop: + dex + sta note_a,X + bne zero_song_structs_loop + + sta pt3_noise_period_smc+1 ; 4 + sta pt3_noise_add_smc+1 ; 4 + + sta pt3_envelope_period_l_smc+1 ; 4 + sta pt3_envelope_period_h_smc+1 ; 4 + sta pt3_envelope_slide_l_smc+1 ; 4 + sta pt3_envelope_slide_h_smc+1 ; 4 + sta pt3_envelope_slide_add_l_smc+1 ; 4 + sta pt3_envelope_slide_add_h_smc+1 ; 4 + sta pt3_envelope_add_smc+1 ; 4 + sta pt3_envelope_type_smc+1 ; 4 + sta pt3_envelope_type_old_smc+1 ; 4 + sta pt3_envelope_delay_smc+1 ; 4 + sta pt3_envelope_delay_orig_smc+1 ; 4 + + sta PT3_MIXER_VAL ; 3 + + sta current_pattern_smc+1 ; 4 + sta current_line_smc+1 ; 4 + sta current_subframe_smc+1 ; 4 + + lda #$f ; 2 + sta note_a+NOTE_VOLUME ; 4 + sta note_b+NOTE_VOLUME ; 4 + sta note_c+NOTE_VOLUME ; 4 + + ; default ornament/sample in A + ; X is zero coming in here + ;ldx #(NOTE_STRUCT_SIZE*0) ; 2 + jsr load_ornament0_sample1 ; 6+93 + + ; default ornament/sample in B + ldx #(NOTE_STRUCT_SIZE*1) ; 2 + jsr load_ornament0_sample1 ; 6+93 + + ; default ornament/sample in C + ldx #(NOTE_STRUCT_SIZE*2) ; 2 + jsr load_ornament0_sample1 ; 6+93 + + ;======================= + ; load default speed + + lda PT3_LOC+PT3_SPEED ; 4 + sta pt3_speed_smc+1 ; 4 + + ;======================= + ; load loop + + lda PT3_LOC+PT3_LOOP ; 4 + sta pt3_loop_smc+1 ; 4 + + + ;======================== + ;======================== + ; set up note/freq table + ; this saves some space and makes things marginally faster longrun + ;======================== + ;======================== + ; note (heh) that there are separate tables if version 3.3 + ; but we are going to assume we are only going to be playing + ; newer 3.4+ version files so only need the newer tables + + ldx PT3_LOC+PT3_HEADER_FREQUENCY ; 4 + beq use_freq_table_0 + dex + beq use_freq_table_1 + dex + beq use_freq_table_2 + ; fallthrough (freq table 3) + +use_freq_table_3: + ;================================================= + ; Create Table #3, v4+, "PT3NoteTable_REAL_34_35" + ;================================================= + + ldy #11 ; !2 +freq_table_3_copy_loop: + ; note, high lookup almost same as 2v4, just need to adjust one value + + lda base2_v4_high,Y ; !3 + sta NoteTable_high,Y ; !3 + lda base3_low,Y ; !3 + sta NoteTable_low,Y ; !3 + dey ; !1 + bpl freq_table_3_copy_loop ; !2 + + dec NoteTable_high ; adjust to right value + + jsr NoteTablePropogate ; !3 + + lda #table3_v4_adjust + sta note_table_adjust_smc+2 + + jsr NoteTableAdjust + + jmp done_set_freq_table + + + +use_freq_table_2: + ;================================================= + ; Create Table #2, v4+, "PT3NoteTable_ASM_34_35" + ;================================================= + + ldy #11 +freq_table_2_copy_loop: + lda base2_v4_high,Y + sta NoteTable_high,Y + lda base2_v4_low,Y + sta NoteTable_low,Y + dey + bpl freq_table_2_copy_loop + + jsr NoteTablePropogate ; !3 + + lda #table2_v4_adjust + sta note_table_adjust_smc+2 + + jsr NoteTableAdjust + + jmp done_set_freq_table + +use_freq_table_1: + ;================================================= + ; Create Table #1, "PT3NoteTable_ST" + ;================================================= + + ldy #11 +freq_table_1_copy_loop: + lda base1_high,Y + sta NoteTable_high,Y + lda base1_low,Y + sta NoteTable_low,Y + dey + bpl freq_table_1_copy_loop + + jsr NoteTablePropogate ; !3 + + ; last adjustments + lda #$FD ; Tone[23]=$3FD + sta NoteTable_low+23 + dec NoteTable_low+46 ; Tone[46]-=1; + + + jmp done_set_freq_table + + +use_freq_table_0: + ;================================================= + ; Create Table #0, "PT3NoteTable_PT_34_35" + ;================================================= + + ldy #11 +freq_table_0_copy_loop: + lda base0_v4_high,Y + sta NoteTable_high,Y + lda base0_v4_low,Y + sta NoteTable_low,Y + dey + bpl freq_table_0_copy_loop + + jsr NoteTablePropogate ; !3 + + lda #table0_v4_adjust + sta note_table_adjust_smc+2 + + jsr NoteTableAdjust + + +done_set_freq_table: + + + ;====================== + ; calculate version + ldx #6 ; 2 + lda PT3_LOC+PT3_VERSION ; 4 + sec ; 2 + sbc #'0' ; 2 + cmp #9 ; 2 + bcs not_ascii_number ; bge ; 2/3 + tax ; 2 + +not_ascii_number: + + ; adjust version<6 SMC code in the slide code + + ; FIXME: I am sure there's a more clever way to do this + + lda #$2C ; BIT ; 2 + cpx #$6 ; 2 + bcs version_greater_than_or_equal_6 ; bgt ; 3 + ; less than 6, jump + ; also carry is known to be clear + adc #$20 ; BIT->JMP 2C->4C ; 2 +version_greater_than_or_equal_6: + sta version_smc ; 4 + +pick_volume_table: + + ;======================= + ; Pick which volume number, based on version + + ; if (PlParams.PT3.PT3_Version <= 4) + + cpx #5 ; 2 + + ; carry clear = 3.3/3.4 table + ; carry set = 3.5 table + + ;========================== + ; VolTableCreator + ;========================== + ; Creates the appropriate volume table + ; based on z80 code by Ivan Roshin ZXAYHOBETA/VTII10bG.asm + ; + + ; Called with carry==0 for 3.3/3.4 table + ; Called with carry==1 for 3.5 table + + ; 177f-1932 = 435 bytes, not that much better than 512 of lookup + + +VolTableCreator: + + ; Init initial variables + lda #$0 + sta z80_d_smc+1 + ldy #$11 + + ; Set up self modify + + ldx #$2A ; ROL for self-modify + bcs vol_type_35 + +vol_type_33: + + ; For older table, we set initial conditions a bit + ; different + + dey + tya + + ldx #$ea ; NOP for self modify + +vol_type_35: + sty z80_l_smc+1 ; l=16 or 17 + sta z80_e_smc+1 ; e=16 or 0 + stx vol_smc ; set the self-modify code + + ldy #16 ; skip first row, all zeros + ldx #16 ; c=16 +vol_outer: + clc ; add HL,DE +z80_l_smc: + lda #$d1 +z80_e_smc: + adc #$d1 + sta z80_e_smc+1 + lda #0 +z80_d_smc: + adc #$d1 + sta z80_d_smc+1 ; carry is important + + ; sbc hl,hl + lda #0 + adc #$ff + eor #$ff + +vol_write: + sta z80_h_smc+1 + pha + +vol_inner: + pla + pha + +vol_smc: + nop ; nop or ROL depending + +z80_h_smc: + lda #$d1 + + adc #$0 ; a=a+carry; + + sta VolumeTable,Y + iny + + pla ; add HL,DE + adc z80_e_smc+1 + pha + lda z80_h_smc+1 + adc z80_d_smc+1 + sta z80_h_smc+1 + + inx ; inc C + txa ; a=c + and #$f + bne vol_inner + + + pla + + lda z80_e_smc+1 ; a=e + cmp #$77 + bne vol_m3 + + inc z80_e_smc+1 + +vol_m3: + txa ; a=c + bne vol_outer + +vol_done: + rts + + + ;========================================= + ; copy note table seed to proper location + ;========================================= + +; faster inlined + +;NoteTableCopy: + +; ldy #11 ; !2 +;note_table_copy_loop: +;ntc_smc1: +; lda base1_high,Y ; !3 +; sta NoteTable_high,Y ; !3 +;ntc_smc2: +; lda base1_low,Y ; !3 +; sta NoteTable_low,Y ; !3 +; dey ; !1 +; bpl note_table_copy_loop ; !2 +; rts ; !1 + + + ;========================================== + ; propogate the freq down, dividing by two + ;========================================== +NoteTablePropogate: + + ldy #0 +note_table_propogate_loop: + clc + lda NoteTable_high,Y + ror + sta NoteTable_high+12,Y + + lda NoteTable_low,Y + ror + sta NoteTable_low+12,Y + + iny + cpy #84 + bne note_table_propogate_loop + + rts + + + ;================================================ + ; propogation isn't enough, various values + ; are often off by one, so adjust using a bitmask + ;================================================ +NoteTableAdjust: + + ldx #0 +note_table_adjust_outer: + +note_table_adjust_smc: + lda table0_v4_adjust,X + sta PT3_TEMP + + ; reset smc + lda #NoteTable_low + sta ntl_smc+2 + + + ldy #7 +note_table_adjust_inner: + ror PT3_TEMP + bcc note_table_skip_adjust + +ntl_smc: + inc NoteTable_low,X + +note_table_skip_adjust: + clc + lda #12 + adc ntl_smc+1 + sta ntl_smc+1 + lda #0 + adc ntl_smc+2 ; unnecessary if aligned + sta ntl_smc+2 + +skip_adjust_done: + dey + bpl note_table_adjust_inner + + inx + cpx #12 + bne note_table_adjust_outer + + rts + + +;base0_v3_high: +;.byte $0C,$0B,$0A,$0A,$09,$09,$08,$08,$07,$07,$06,$06 +;base0_v3_low: +;.byte $21,$73,$CE,$33,$A0,$16,$93,$18,$A4,$36,$CE,$6D + +; note: same as base0_v3_high +base0_v4_high: +.byte $0C,$0B,$0A,$0A,$09,$09,$08,$08,$07,$07,$06,$06 +base0_v4_low: +.byte $22,$73,$CF,$33,$A1,$17,$94,$19,$A4,$37,$CF,$6D + +base1_high: +.byte $0E,$0E,$0D,$0C,$0B,$0B,$0A,$09,$09,$08,$08,$07 +base1_low: +.byte $F8,$10,$60,$80,$D8,$28,$88,$F0,$60,$E0,$58,$E0 + +;base2_v3_high: +;.byte $0D,$0C,$0B,$0B,$0A,$09,$09,$08,$08,$07,$07,$07 +;base2_v3_low: +;.byte $3E,$80,$CC,$22,$82,$EC,$5C,$D6,$58,$E0,$6E,$04 + +; note almost same as above +base2_v4_high: +.byte $0D,$0C,$0B,$0A,$0A,$09,$09,$08,$08,$07,$07,$06 +base2_v4_low: +.byte $10,$55,$A4,$FC,$5F,$CA,$3D,$B8,$3B,$C5,$55,$EC + +; note almost same as above +;base3_high: +;.byte $0C,$0C,$0B,$0A,$0A,$09,$09,$08,$08,$07,$07,$06 +base3_low: +.byte $DA,$22,$73,$CF,$33,$A1,$17,$94,$19,$A4,$37,$CF + + +; Adjustment factors +table0_v4_adjust: +.byte $40,$e6,$9c,$66,$40,$2c,$20,$30,$48,$6c,$1c,$5a + +table2_v4_adjust: +.byte $20,$a8,$40,$f8,$bc,$90,$78,$70,$74,$08,$2a,$50 + +table3_v4_adjust: +.byte $B4,$40,$e6,$9c,$66,$40,$2c,$20,$30,$48,$6c,$1c + + +; Table #1 of Pro Tracker 3.3x - 3.5x +;PT3NoteTable_ST_high: +;.byte $0E,$0E,$0D,$0C,$0B,$0B,$0A,$09 +;.byte $09,$08,$08,$07,$07,$07,$06,$06 +;.byte $05,$05,$05,$04,$04,$04,$04,$03 +;.byte $03,$03,$03,$03,$02,$02,$02,$02 +;.byte $02,$02,$02,$01,$01,$01,$01,$01 +;.byte $01,$01,$01,$01,$01,$01,$01,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 + +;PT3NoteTable_ST_low: +;.byte $F8,$10,$60,$80,$D8,$28,$88,$F0 +;.byte $60,$E0,$58,$E0,$7C,$08,$B0,$40 +;.byte $EC,$94,$44,$F8,$B0,$70,$2C,$FD +;.byte $BE,$84,$58,$20,$F6,$CA,$A2,$7C +;.byte $58,$38,$16,$F8,$DF,$C2,$AC,$90 +;.byte $7B,$65,$51,$3E,$2C,$1C,$0A,$FC +;.byte $EF,$E1,$D6,$C8,$BD,$B2,$A8,$9F +;.byte $96,$8E,$85,$7E,$77,$70,$6B,$64 +;.byte $5E,$59,$54,$4F,$4B,$47,$42,$3F +;.byte $3B,$38,$35,$32,$2F,$2C,$2A,$27 +;.byte $25,$23,$21,$1F,$1D,$1C,$1A,$19 +;.byte $17,$16,$15,$13,$12,$11,$10,$0F + + +; Table #2 of Pro Tracker 3.4x - 3.5x +;PT3NoteTable_ASM_34_35_high: +;.byte $0D,$0C,$0B,$0A,$0A,$09,$09,$08 +;.byte $08,$07,$07,$06,$06,$06,$05,$05 +;.byte $05,$04,$04,$04,$04,$03,$03,$03 +;.byte $03,$03,$02,$02,$02,$02,$02,$02 +;.byte $02,$01,$01,$01,$01,$01,$01,$01 +;.byte $01,$01,$01,$01,$01,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 +;.byte $00,$00,$00,$00,$00,$00,$00,$00 + +;PT3NoteTable_ASM_34_35_low: +;.byte $10,$55,$A4,$FC,$5F,$CA,$3D,$B8 +;.byte $3B,$C5,$55,$EC,$88,$2A,$D2,$7E +;.byte $2F,$E5,$9E,$5C,$1D,$E2,$AB,$76 +;.byte $44,$15,$E9,$BF,$98,$72,$4F,$2E +;.byte $0F,$F1,$D5,$BB,$A2,$8B,$74,$60 +;.byte $4C,$39,$28,$17,$07,$F9,$EB,$DD +;.byte $D1,$C5,$BA,$B0,$A6,$9D,$94,$8C +;.byte $84,$7C,$75,$6F,$69,$63,$5D,$58 +;.byte $53,$4E,$4A,$46,$42,$3E,$3B,$37 +;.byte $34,$31,$2F,$2C,$29,$27,$25,$23 +;.byte $21,$1F,$1D,$1C,$1A,$19,$17,$16 +;.byte $15,$14,$12,$11,$10,$0F,$0E,$0D + + +;PT3VolumeTable_33_34: +;.byte $0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0 +;.byte $0,$0,$0,$0,$0,$0,$0,$0,$1,$1,$1,$1,$1,$1,$1,$1 +;.byte $0,$0,$0,$0,$0,$0,$1,$1,$1,$1,$1,$2,$2,$2,$2,$2 +;.byte $0,$0,$0,$0,$1,$1,$1,$1,$2,$2,$2,$2,$3,$3,$3,$3 +;.byte $0,$0,$0,$0,$1,$1,$1,$2,$2,$2,$3,$3,$3,$4,$4,$4 +;.byte $0,$0,$0,$1,$1,$1,$2,$2,$3,$3,$3,$4,$4,$4,$5,$5 +;.byte $0,$0,$0,$1,$1,$2,$2,$3,$3,$3,$4,$4,$5,$5,$6,$6 +;.byte $0,$0,$1,$1,$2,$2,$3,$3,$4,$4,$5,$5,$6,$6,$7,$7 +;.byte $0,$0,$1,$1,$2,$2,$3,$3,$4,$5,$5,$6,$6,$7,$7,$8 +;.byte $0,$0,$1,$1,$2,$3,$3,$4,$5,$5,$6,$6,$7,$8,$8,$9 +;.byte $0,$0,$1,$2,$2,$3,$4,$4,$5,$6,$6,$7,$8,$8,$9,$A +;.byte $0,$0,$1,$2,$3,$3,$4,$5,$6,$6,$7,$8,$9,$9,$A,$B +;.byte $0,$0,$1,$2,$3,$4,$4,$5,$6,$7,$8,$8,$9,$A,$B,$C +;.byte $0,$0,$1,$2,$3,$4,$5,$6,$7,$7,$8,$9,$A,$B,$C,$D +;.byte $0,$0,$1,$2,$3,$4,$5,$6,$7,$8,$9,$A,$B,$C,$D,$E +;.byte $0,$1,$2,$3,$4,$5,$6,$7,$8,$9,$A,$B,$C,$D,$E,$F + +;PT3VolumeTable_35: +;.byte $0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0,$0 +;.byte $0,$0,$0,$0,$0,$0,$0,$0,$1,$1,$1,$1,$1,$1,$1,$1 +;.byte $0,$0,$0,$0,$1,$1,$1,$1,$1,$1,$1,$1,$2,$2,$2,$2 +;.byte $0,$0,$0,$1,$1,$1,$1,$1,$2,$2,$2,$2,$2,$3,$3,$3 +;.byte $0,$0,$1,$1,$1,$1,$2,$2,$2,$2,$3,$3,$3,$3,$4,$4 +;.byte $0,$0,$1,$1,$1,$2,$2,$2,$3,$3,$3,$4,$4,$4,$5,$5 +;.byte $0,$0,$1,$1,$2,$2,$2,$3,$3,$4,$4,$4,$5,$5,$6,$6 +;.byte $0,$0,$1,$1,$2,$2,$3,$3,$4,$4,$5,$5,$6,$6,$7,$7 +;.byte $0,$1,$1,$2,$2,$3,$3,$4,$4,$5,$5,$6,$6,$7,$7,$8 +;.byte $0,$1,$1,$2,$2,$3,$4,$4,$5,$5,$6,$7,$7,$8,$8,$9 +;.byte $0,$1,$1,$2,$3,$3,$4,$5,$5,$6,$7,$7,$8,$9,$9,$A +;.byte $0,$1,$1,$2,$3,$4,$4,$5,$6,$7,$7,$8,$9,$A,$A,$B +;.byte $0,$1,$2,$2,$3,$4,$5,$6,$6,$7,$8,$9,$A,$A,$B,$C +;.byte $0,$1,$2,$3,$3,$4,$5,$6,$7,$8,$9,$A,$A,$B,$C,$D +;.byte $0,$1,$2,$3,$4,$5,$6,$7,$7,$8,$9,$A,$B,$C,$D,$E +;.byte $0,$1,$2,$3,$4,$5,$6,$7,$8,$9,$A,$B,$C,$D,$E,$F diff --git a/music/zero_wing/pt3_lib_irq_handler.s b/music/zero_wing/pt3_lib_irq_handler.s new file mode 100644 index 00000000..851a22bf --- /dev/null +++ b/music/zero_wing/pt3_lib_irq_handler.s @@ -0,0 +1,116 @@ + + +pt3_irq_handler: + +pt3_irq_smc1: + bit MOCK_6522_T1CL ; clear 6522 interrupt by reading T1C-L ; 4 + + lda DONE_PLAYING ; 3 + beq pt3_play_music ; if song done, don't play music ; 3/2nt + jmp done_pt3_irq_handler ; 3 + ;============ + ; 13 + +pt3_play_music: + + ; decode a frame of music + + jsr pt3_make_frame + + ; handle song over condition + lda DONE_SONG + beq mb_write_frame ; if not done, continue + + lda LOOP ; see if looping + beq move_to_next + +pt3_loop_smc: + lda #$d1 ; looping, move to loop location + ; non-zero to avoid the temptation + ; to merge with following lda #$0 + sta current_pattern_smc+1 + lda #$0 + sta current_line_smc+1 + sta current_subframe_smc+1 + sta DONE_SONG ; undo the next song + + beq done_pt3_irq_handler ; branch always + +move_to_next: + ; same as "press right" + ldx #$20 + jmp quiet_exit + + ;====================================== + ; Write frames to Mockingboard + ;====================================== + ; for speed could merge this into + ; the decode code + +mb_write_frame: + + + tax ; set up reg count ; 2 + ;============ + ; 2 + + ;================================== + ; loop through the 14 registers + ; reading the value, then write out + ;================================== + +mb_write_loop: + lda AY_REGISTERS,X ; load register value ; 4 + + ; special case R13. If it is 0xff, then don't update + ; otherwise might spuriously reset the envelope settings + + cpx #13 ; 2 + bne mb_not_13 ; 3/2nt + cmp #$ff ; 2 + beq mb_skip_13 ; 3/2nt + ;============ + ; typ 5 +mb_not_13: + + + ; address +pt3_irq_smc2: + stx MOCK_6522_ORA1 ; put address on PA1 ; 4 + stx MOCK_6522_ORA2 ; put address on PA2 ; 4 + ldy #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2 +pt3_irq_smc3: + sty MOCK_6522_ORB1 ; latch_address on PB1 ; 4 + sty MOCK_6522_ORB2 ; latch_address on PB2 ; 4 + ldy #MOCK_AY_INACTIVE ; go inactive ; 2 +pt3_irq_smc4: + sty MOCK_6522_ORB1 ; 4 + sty MOCK_6522_ORB2 ; 4 + + ; value +pt3_irq_smc5: + sta MOCK_6522_ORA1 ; put value on PA1 ; 4 + sta MOCK_6522_ORA2 ; put value on PA2 ; 4 + lda #MOCK_AY_WRITE ; ; 2 +pt3_irq_smc6: + sta MOCK_6522_ORB1 ; write on PB1 ; 4 + sty MOCK_6522_ORB1 ; 4 +pt3_irq_smc7: + sta MOCK_6522_ORB2 ; write on PB2 ; 4 + sty MOCK_6522_ORB2 ; 4 + ;=========== + ; 56 +mb_no_write: + inx ; point to next register ; 2 + cpx #14 ; if 14 we're done ; 2 + bmi mb_write_loop ; otherwise, loop ; 3/2nt + ;============ + ; 7 +mb_skip_13: + + + ;================================= + ; Finally done with this interrupt + ;================================= + +done_pt3_irq_handler: diff --git a/music/zero_wing/pt3_lib_mockingboard.inc b/music/zero_wing/pt3_lib_mockingboard.inc new file mode 100644 index 00000000..80a8fdd1 --- /dev/null +++ b/music/zero_wing/pt3_lib_mockingboard.inc @@ -0,0 +1,54 @@ +; Mockingboad programming: +; + Has two 6522 I/O chips connected to two AY-3-8910 chips +; + Optionally has some speech chips controlled via the outport on the AY +; + Often in slot 4 +; TODO: how to auto-detect? +; References used: +; http://macgui.com/usenet/?group=2&id=8366 +; 6522 Data Sheet +; AY-3-8910 Data Sheet + +;======================== +; Mockingboard card +; Essentially two 6522s hooked to the Apple II bus +; Connected to AY-3-8910 chips +; PA0-PA7 on 6522 connected to DA0-DA7 on AY +; PB0 on 6522 connected to BC1 +; PB1 on 6522 connected to BDIR +; PB2 on 6522 connected to RESET + + +; left speaker +MOCK_6522_ORB1 = $C400 ; 6522 #1 port b data +MOCK_6522_ORA1 = $C401 ; 6522 #1 port a data +MOCK_6522_DDRB1 = $C402 ; 6522 #1 data direction port B +MOCK_6522_DDRA1 = $C403 ; 6522 #1 data direction port A +MOCK_6522_T1CL = $C404 ; 6522 #1 t1 low order latches +MOCK_6522_T1CH = $C405 ; 6522 #1 t1 high order counter +MOCK_6522_T1LL = $C406 ; 6522 #1 t1 low order latches +MOCK_6522_T1LH = $C407 ; 6522 #1 t1 high order latches +MOCK_6522_T2CL = $C408 ; 6522 #1 t2 low order latches +MOCK_6522_T2CH = $C409 ; 6522 #1 t2 high order counters +MOCK_6522_SR = $C40A ; 6522 #1 shift register +MOCK_6522_ACR = $C40B ; 6522 #1 auxilliary control register +MOCK_6522_PCR = $C40C ; 6522 #1 peripheral control register +MOCK_6522_IFR = $C40D ; 6522 #1 interrupt flag register +MOCK_6522_IER = $C40E ; 6522 #1 interrupt enable register +MOCK_6522_ORANH = $C40F ; 6522 #1 port a data no handshake + + +; right speaker +MOCK_6522_ORB2 = $C480 ; 6522 #2 port b data +MOCK_6522_ORA2 = $C481 ; 6522 #2 port a data +MOCK_6522_DDRB2 = $C482 ; 6522 #2 data direction port B +MOCK_6522_DDRA2 = $C483 ; 6522 #2 data direction port A + +; AY-3-8910 commands on port B +; RESET BDIR BC1 +MOCK_AY_RESET = $0 ; 0 0 0 +MOCK_AY_INACTIVE = $4 ; 1 0 0 +MOCK_AY_READ = $5 ; 1 0 1 +MOCK_AY_WRITE = $6 ; 1 1 0 +MOCK_AY_LATCH_ADDR = $7 ; 1 1 1 + + diff --git a/music/zero_wing/pt3_lib_mockingboard_detect.s b/music/zero_wing/pt3_lib_mockingboard_detect.s new file mode 100644 index 00000000..cd36df72 --- /dev/null +++ b/music/zero_wing/pt3_lib_mockingboard_detect.s @@ -0,0 +1,222 @@ +;=================================================================== +; code to detect mockingboard +;=================================================================== +; this isn't always easy +; my inclination is to just assume slot #4 but that isn't always realistic + +; code below based on "hw.mockingboard.a" from "Total Replay" + +;license:MIT +; By Andrew Roughan +; in the style of 4am for Total Replay +; +; Mockingboard support functions +; + +;------------------------------------------------------------------------------ +; HasMockingboard +; detect Mockingboard card by searching for 6522 timers across all slots +; access 6522 timers with deterministic cycle counts +; +; based on prior art in Mockingboard Developers Toolkit +; with optimisation from deater/french touch +; also takes into account FastChip //e clock difference +; +; in: none +; accelerators should be off +; out: C set if Mockingboard found in any slot +; if card was found, X = #$Cn where n is the slot number of the card +; C clear if no Mockingboard found +; other flags clobbered +; A/Y clobbered +;------------------------------------------------------------------------------ + +mockingboard_detect: + + ; activate Mockingboard IIc + ; + the Mockingboard has to take over Slot#4 (IIc has no slots) + ; in theory any write to the firmware area in $C400 will + ; activate it, but that might not be fast enough when detecting + ; so writing $FF to $C403/$C404 is official way to enable + ; + Note this disables permanently the mouse firmware in $C400 + ; so "normal" interrupts are broken :( The hack to fix things + ; is to switch in RAM for $F000 and just replace the IRQ + ; vectors at $FFFE/$FFFF instead of $3FE/$3FF but that makes + ; it difficult if you actually wanted to use any + ; Applesoft/Monitor ROM routines + +.ifdef PT3_ENABLE_APPLE_IIC + lda APPLEII_MODEL + cmp #'C' + bne not_iic + + lda #$ff + + ; don't bother patching these, IIc mockingboard always slot 4 + + sta MOCK_6522_DDRA1 ; $C403 + sta MOCK_6522_T1CL ; $C404 +.endif + +not_iic: + lda #$00 + sta MB_ADDR_L + ldx #$C7 ; start at slot #7 +mb_slot_loop: + stx MB_ADDR_H + ldy #$04 ; 6522 #1 $Cx04 + jsr mb_timer_check + bne mb_next_slot + ldy #$84 ; 6522 #2 $Cx84 + jsr mb_timer_check + bne mb_next_slot +mb_found: + sec ; found + rts + +mb_next_slot: + dex + cpx #$C0 + bne mb_slot_loop + + clc ; not found + rts + +mb_timer_check: + lda (MB_ADDR_L),Y ; read 6522 timer low byte + sta MB_VALUE + lda (MB_ADDR_L),Y ; second time + sec + sbc MB_VALUE + cmp #$F8 ; looking for (-)8 cycles between reads + beq mb_timer_check_done + cmp #$F7 ; FastChip //e clock is different +mb_timer_check_done: + rts + + + +.if 0 + + + ;======================================= + ; Detect a Mockingboard card + ;======================================= + ; Based on code from the French Touch "Pure Noise" Demo + ; Attempts to time an instruction sequence with a 6522 + ; + ; If found, puts in bMB + ; MB_ADDRL:MB_ADDRH has address of Mockingboard + ; returns X=0 if not found, X=1 if found + +mockingboard_detect: + lda #0 + sta MB_ADDRL + +mb_detect_loop: ; self-modifying + lda #$07 ; we start in slot 7 ($C7) and go down to 0 ($C0) + ora #$C0 ; make it start with C + sta MB_ADDRH + ldy #04 ; $CX04 + ldx #02 ; 2 tries? +mb_check_cycle_loop: + lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter) + ; count down + sta PT3_TEMP ; 3 cycles + lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles + ; between the two accesses to the timer + sec + sbc PT3_TEMP ; subtract to see if we had 8 cycles + cmp #$f8 ; -8 + bne mb_not_in_this_slot + dex ; decrement, try one more time + bne mb_check_cycle_loop ; loop detection + inx ; Mockingboard found (X=1) +done_mb_detect: + ;stx bMB ; store result to bMB + rts ; return + +mb_not_in_this_slot: + dec mb_detect_loop+1 ; decrement the "slot" (self_modify) + bne mb_detect_loop ; loop down to one + ldx #00 + beq done_mb_detect + +;alternative MB detection from Nox Archaist +; lda #$04 +; sta MB_ADDRL +; ldx #$c7 +; +;find_mb: +; stx MB_ADDRH +; +; ;detect sound I +; +; sec +; ldy #$00 +; lda (MB_ADDRL), y +; sbc (MB_ADDRL), y +; cmp #$05 +; beq found_mb +; dex +; cpx #$c0 +; bne find_mb +; ldx #$00 ;no mockingboard found +; rts +; +;found_mb: +; ldx #$01 ;mockingboard found +; rts +; +; ;optionally detect sound II +; +; sec +; ldy #$80 +; lda (MB_ADDRL), y +; sbc (MB_ADDRL), y +; cmp #$05 +; beq found_mb + + + ;======================================= + ; Detect a Mockingboard card in Slot4 + ;======================================= + ; Based on code from the French Touch "Pure Noise" Demo + ; Attempts to time an instruction sequence with a 6522 + ; + ; MB_ADDRL:MB_ADDRH has address of Mockingboard + ; returns X=0 if not found, X=1 if found + +mockingboard_detect_slot4: + lda #0 + sta MB_ADDRL + +mb4_detect_loop: ; self-modifying + lda #$04 ; we're only looking in Slot 4 + ora #$C0 ; make it start with C + sta MB_ADDRH + ldy #04 ; $CX04 + ldx #02 ; 2 tries? +mb4_check_cycle_loop: + lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter) + ; count down + sta PT3_TEMP ; 3 cycles + lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles + ; between the two accesses to the timer + sec + sbc PT3_TEMP ; subtract to see if we had 8 cycles + cmp #$f8 ; -8 + bne mb4_not_in_this_slot + dex ; decrement, try one more time + bne mb4_check_cycle_loop ; loop detection + inx ; Mockingboard found (X=1) +done_mb4_detect: + rts ; return + +mb4_not_in_this_slot: + ldx #00 + beq done_mb4_detect + + + +.endif diff --git a/music/zero_wing/pt3_lib_mockingboard_patch.s b/music/zero_wing/pt3_lib_mockingboard_patch.s new file mode 100644 index 00000000..89665c64 --- /dev/null +++ b/music/zero_wing/pt3_lib_mockingboard_patch.s @@ -0,0 +1,120 @@ + +;=================================================================== +; code to patch mockingboard if not in slot#4 +;=================================================================== +; this is the brute force version, we have to patch 39 locations +; see further below if you want to try a smaller, more dangerous, patch + +.if 0 +mockingboard_patch: + + lda MB_ADDR_H + + sta pt3_irq_smc1+2 ; 1 + + sta pt3_irq_smc2+2 ; 2 + sta pt3_irq_smc2+5 ; 3 + + sta pt3_irq_smc3+2 ; 4 + sta pt3_irq_smc3+5 ; 5 + + sta pt3_irq_smc4+2 ; 6 + sta pt3_irq_smc4+5 ; 7 + + sta pt3_irq_smc5+2 ; 8 + sta pt3_irq_smc5+5 ; 9 + + sta pt3_irq_smc6+2 ; 10 + sta pt3_irq_smc6+5 ; 11 + + sta pt3_irq_smc7+2 ; 12 + sta pt3_irq_smc7+5 ; 13 + + sta mock_init_smc1+2 ; 14 + sta mock_init_smc1+5 ; 15 + + sta mock_init_smc2+2 ; 16 + sta mock_init_smc2+5 ; 17 + + sta reset_ay_smc1+2 ; 18 + sta reset_ay_smc2+2 ; 19 + sta reset_ay_smc3+2 ; 20 + sta reset_ay_smc4+2 ; 21 + + sta write_ay_smc1+2 ; 22 + sta write_ay_smc1+5 ; 23 + + sta write_ay_smc2+2 ; 24 + sta write_ay_smc2+5 ; 25 + + sta write_ay_smc3+2 ; 26 + sta write_ay_smc3+5 ; 27 + + sta write_ay_smc4+2 ; 28 + sta write_ay_smc4+5 ; 29 + + sta write_ay_smc5+2 ; 30 + sta write_ay_smc5+5 ; 31 + + sta write_ay_smc6+2 ; 32 + sta write_ay_smc6+5 ; 33 + + sta setup_irq_smc1+2 ; 34 + sta setup_irq_smc2+2 ; 35 + sta setup_irq_smc3+2 ; 36 + sta setup_irq_smc4+2 ; 37 + sta setup_irq_smc5+2 ; 38 + sta setup_irq_smc6+2 ; 39 + + rts +.endif + +;=================================================================== +; dangerous code to patch mockingboard if not in slot#4 +;=================================================================== +; this code patches any $C4 value to the proper slot# if not slot4 +; this can be dangerous, it might over-write other important values +; that should be $C4 + +; safer ways to do this: +; only do this if 2 bytes after a LDA/STA/LDX/STX +; count total and if not 39 then print error message + +mockingboard_patch: + ; from mockingboard_init $1BBF + ; to done_pt3_irq_handler $1D85 + + ldx MB_ADDR_H + ldy #0 + + lda #mockingboard_init + sta MB_ADDR_H + +mb_patch_loop: + lda (MB_ADDR_L),Y + cmp #$C4 + bne mb_patch_nomatch + + txa + sta (MB_ADDR_L),Y +mb_patch_nomatch: + + ; 16-bit increment + + inc MB_ADDR_L + bne mb_patch_oflo + inc MB_ADDR_H + +mb_patch_oflo: + lda MB_ADDR_H + cmp #>done_pt3_irq_handler + bne mb_patch_loop + lda MB_ADDR_L + cmp # Latch Address -> Inactive -> Write Data -> Inactive + + ;========================================= + ; Write Right/Left to save value AY-3-8910 + ;========================================= + ; register in X + ; value in MB_VALUE + +write_ay_both: + ; address + +write_ay_smc1: + stx MOCK_6522_ORA1 ; put address on PA1 ; 4 + stx MOCK_6522_ORA2 ; put address on PA2 ; 4 + lda #MOCK_AY_LATCH_ADDR ; latch_address on PB1 ; 2 +write_ay_smc2: + sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4 + sta MOCK_6522_ORB2 ; latch_address on PB2 ; 4 + ldy #MOCK_AY_INACTIVE ; go inactive ; 2 +write_ay_smc3: + sty MOCK_6522_ORB1 ; 4 + sty MOCK_6522_ORB2 ; 4 + ;=========== + ; 28 + ; value + lda MB_VALUE ; 3 +write_ay_smc4: + sta MOCK_6522_ORA1 ; put value on PA1 ; 4 + sta MOCK_6522_ORA2 ; put value on PA2 ; 4 + lda #MOCK_AY_WRITE ; ; 2 +write_ay_smc5: + sta MOCK_6522_ORB1 ; write on PB1 ; 4 + sta MOCK_6522_ORB2 ; write on PB2 ; 4 +write_ay_smc6: + sty MOCK_6522_ORB1 ; 4 + sty MOCK_6522_ORB2 ; 4 + ;=========== + ; 29 + + rts ; 6 + ;=========== + ; 63 +write_ay_both_end: +;.assert >write_ay_both = >write_ay_both_end, error, "write_ay_both crosses page" + + ;======================================= + ; clear ay -- clear all 14 AY registers + ; should silence the card + ;======================================= + ; 7+(74*14)+5=1048 +clear_ay_both: + ldx #13 ; 2 + lda #0 ; 2 + sta MB_VALUE ; 3 +clear_ay_left_loop: + jsr write_ay_both ; 6+63 + dex ; 2 + bpl clear_ay_left_loop ; 3 + ; -1 + rts ; 6 + +clear_ay_end: +;.assert >clear_ay_both = >clear_ay_end, error, "clear_ay_both crosses page" + + ;============================= + ; Setup + ;============================= +mockingboard_setup_interrupt: + + + ; for this game with things in language card including + ; irq handler, always force IIc mode (where RAM swapped in + ; and we put the irq handler address directly up at $FFFE) + + lda #interrupt_handler + sta $ffff + + ; nop out the "lda $45" since we are bypassing the ROM irq handler + ; that puts A in $45 + lda #$EA + sta interrupt_smc + sta interrupt_smc+1 + + + ;========================= + ; Setup Interrupt Handler + ;========================= + ; Vector address goes to 0x3fe/0x3ff + ; FIXME: should chain any existing handler + +; lda #interrupt_handler +; sta $03ff + + ;============================ + ; Enable 50Hz clock on 6522 + ;============================ + + + ; Note, on Apple II the clock isn't 1MHz but is actually closer to + ; roughly 1.023MHz, and every 65th clock is stretched (it's complicated) + + ; 4fe7 / 1.023e6 = .020s, 50Hz + ; 9c40 / 1.023e6 = .040s, 25Hz + ; 411a / 1.023e6 = .016s, 60Hz + + ; French Touch uses + ; 4e20 / 1.000e6 = .020s, 50Hz, which assumes 1MHz clock freq + + sei ; disable interrupts just in case + + lda #$40 ; Continuous interrupts, don't touch PB7 +setup_irq_smc1: + sta MOCK_6522_ACR ; ACR register + lda #$7F ; clear all interrupt flags +setup_irq_smc2: + sta MOCK_6522_IER ; IER register (interrupt enable) + + lda #$C0 +setup_irq_smc3: + sta MOCK_6522_IFR ; IFR: 1100, enable interrupt on timer one oflow +setup_irq_smc4: + sta MOCK_6522_IER ; IER: 1100, enable timer one interrupt + + lda #$E7 +; lda #$20 +setup_irq_smc5: + sta MOCK_6522_T1CL ; write into low-order latch + lda #$4f +; lda #$4E +setup_irq_smc6: + sta MOCK_6522_T1CH ; write into high-order latch, + ; load both values into counter + ; clear interrupt and start counting + + rts + + + + ;============================= + ; Disable Interrupt + ;============================= +mockingboard_disable_interrupt: + + sei ; disable interrupts just in case + + lda #$40 ; Continuous interrupts, don't touch PB7 +disable_irq_smc1: + sta MOCK_6522_ACR ; ACR register + lda #$7F ; clear all interrupt flags +disable_irq_smc2: + sta MOCK_6522_IER ; IER register (interrupt enable) + + rts + diff --git a/music/zero_wing/qload.s b/music/zero_wing/qload.s index bd188f88..0fe58ef3 100644 --- a/music/zero_wing/qload.s +++ b/music/zero_wing/qload.s @@ -1,4 +1,4 @@ -; Loader for MIST +; Loader .include "zp.inc" .include "hardware.inc" @@ -15,7 +15,7 @@ qload_start: ; first time entry ; start by loading text title - lda #0 ; load LEMM engine + lda #0 ; load ZW engine sta WHICH_LOAD lda #1 @@ -23,7 +23,7 @@ qload_start: jsr load_file - jmp $6000 ; jump to LEMM + jmp $6000 ; jump to ZW ;==================================== ; loads file specified by WHICH_LOAD @@ -160,36 +160,24 @@ error_string: .endif which_disk_array: - .byte 1,1,1,1 ; LEMM, LEVEL1, LEVEL2, LEVEL3 - .byte 1,1,1,1 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7 - .byte 1,1,1,1 ; LEVEL8, LEVEL9, LEVEL10 + .byte 1,1,1,1 ; ZW, MUSIC, ?, ? load_address_array: - .byte $60,$90,$90,$90 ; LEMM, LEVEL1, LEVEL2, LEVEL3 - .byte $90,$90,$90,$90 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7 - .byte $90,$90,$90,$90 ; LEVEL8, LEVEL9, LEVEL10 + .byte $60,$D0,$90,$90 ; ZW, MUSIC, ?, ? track_array: - .byte 3, 6, 9,12 ; LEMM, LEVEL1, LEVEL2, LEVEL3 - .byte 15,18,21,24 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7 - .byte 27,30,33,33 ; LEVEL8, LEVEL9, LEVEL10 + .byte 5, 3, 9,12 ; ZW, MUSIC, ?, ? sector_array: - .byte 0, 0, 0, 0 ; LEMM, LEVEL1, LEVEL2, LEVEL3 - .byte 0, 0, 0, 0 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7 - .byte 0, 0, 0, 0 ; LEVEL8, LEVEL9, LEVEL10 + .byte 0, 0, 0, 0 ; ZW, MUSIC, ?, ? length_array: - .byte 48, 46, 46, 46 ; LEMM, LEVEL1, LEVEL2, LEVEL3 - .byte 46, 46, 46, 46 ; LEVEL4, LEVEL5, LEVEL6, LEVEL7 - .byte 46, 46, 32, 32 ; LEVEL8, LEVEL9, LEVEL10 + .byte 48, 32, 48, 48 ; ZW, MUSIC, ?, ? .if 0 - .include "wait.s" - .include "wait_a_bit.s" + .include "audio.s" .include "decompress_fast_v2.s" - .include "gr_offsets.s" .include "hgr_hlin.s" .include "hgr_vlin.s" .include "hgr_box.s" @@ -197,16 +185,25 @@ length_array: .include "hgr_partial_restore.s" .include "hgr_14x14_sprite.s" .include "hgr_sprite.s" + + + + .include "simple_sounds.s" +.endif .include "lc_detect.s" + .include "wait.s" + .include "wait_a_bit.s" .include "gr_fast_clear.s" .include "text_print.s" - .include "simple_sounds.s" + .include "gr_offsets.s" + +; .include "pt3_lib_mockingboard_patch.s" .include "pt3_lib_detect_model.s" +; .include "pt3_lib_core.s" +; .include "pt3_lib_init.s" +; .include "pt3_lib_mockingboard_setup.s" +; .include "interrupt_handler.s" .include "pt3_lib_mockingboard_detect.s" - .include "pt3_lib_mockingboard_setup.s" - .include "interrupt_handler.s" - .include "pt3_lib_mockingboard_patch.s" -.endif qload_end: diff --git a/music/zero_wing/text_print.s b/music/zero_wing/text_print.s index 834a6f3f..34bae3db 100644 --- a/music/zero_wing/text_print.s +++ b/music/zero_wing/text_print.s @@ -44,7 +44,7 @@ print_string_loop: lda (OUTL),Y beq done_print_string ps_smc1: - ora #$80 ; make sure we are not inverse + and #$3f ; make sure we are inverse sta (BASL),Y iny bne print_string_loop @@ -60,4 +60,34 @@ done_print_string: rts + ; set normal text +set_normal: + lda #$80 + sta ps_smc1+1 + lda #09 ; ora + sta ps_smc1 + + rts + + ; restore inverse text +set_inverse: + lda #$29 + sta ps_smc1 + lda #$3f + sta ps_smc1+1 + + rts + + + ;================================ + ; move and print a list of lines + ;================================ + ; look for negative X meaning done +move_and_print_list: + jsr move_and_print + ldy #0 + lda (OUTL),Y + bpl move_and_print_list + + rts diff --git a/music/zero_wing/title.s b/music/zero_wing/title.s new file mode 100644 index 00000000..a2310ab2 --- /dev/null +++ b/music/zero_wing/title.s @@ -0,0 +1,44 @@ + ;===================================== + ; print the title screen + ;===================================== + +show_title: + + ; clear text screen + + jsr clear_all + + ; print non-inverse + + jsr set_normal + + ; print messages + lda #title_text + sta OUTH + + ; print the text + + ldx #16 +title_loop: + + jsr move_and_print + + dex + bne title_loop + + jsr set_inverse + + rts + + +title_text: +.byte 0, 0,"LOADING ZERO_WING V0.01 (16 JAN 2023)",0 +.byte 0, 5," APPLE II CODE: VINCE WEAVER",0 +.byte 0, 6," DISK : QKUMBA",0 +.byte 0, 7," ZX02 : DMSC",0 +.byte 0, 8," MUSIC: ",0 +.byte 0,16," ______",0 +.byte 0,17," A \/\/\/ SOFTWARE PRODUCTION",0 +.byte 0,19," HTTP://WWW.DEATER.NET/WEAVE/VMWPROD",0 diff --git a/music/zero_wing/wait.s b/music/zero_wing/wait.s new file mode 100644 index 00000000..12c4319c --- /dev/null +++ b/music/zero_wing/wait.s @@ -0,0 +1,18 @@ +; copy of ROM wait +; because we might disable ROM + + +wait: + sec +wait2: + pha +wait3: + sbc #$01 + bne wait3 + pla + sbc #$01 + bne wait2 + rts +wait_end: + +.assert (>wait_end - >wait) < 1 , error, "wait crosses page boundary" diff --git a/music/zero_wing/wait_a_bit.s b/music/zero_wing/wait_a_bit.s new file mode 100644 index 00000000..b953ba4a --- /dev/null +++ b/music/zero_wing/wait_a_bit.s @@ -0,0 +1,37 @@ + ;==================================== + ; wait for keypress or a few seconds + ;==================================== + ; A is length to wait + +wait_a_bit: + + bit KEYRESET + tax + +keyloop: + lda #200 ; delay a bit + jsr wait + + lda KEYPRESS + bmi done_keyloop + + dex + bne keyloop +; beq no_escape + +done_keyloop: + +; and #$7f +; cmp #27 +; bne no_escape + +; inc ESC_PRESSED +;no_escape: + + bit KEYRESET + + rts + + + + diff --git a/music/zero_wing/zp.inc b/music/zero_wing/zp.inc index 0c34d246..32ccffc3 100644 --- a/music/zero_wing/zp.inc +++ b/music/zero_wing/zp.inc @@ -53,76 +53,73 @@ LETTERD = $67 LETTER = $68 BLARGH = $69 - ;FACTOR_I = $66 - ;FACTOR_F = $67 - ;DX_I = $68 - ;DX_F = $69 - ;SPACEX_I = $6A - ;SPACEX_F = $6B - ;CX_I = $6C - ;CX_F = $6D - ;DY_I = $6E - ;DY_F = $6F - - -ZPOS = $78 - -REGISTER_DUMP = $70 -A_FINE_TONE = $70 -A_COARSE_TONE = $71 -B_FINE_TONE = $72 -B_COARSE_TONE = $73 -C_FINE_TONE = $74 -C_COARSE_TONE = $75 -NOISE = $76 -ENABLE = $77 -A_VOLUME = $78 -B_VOLUME = $79 -C_VOLUME = $7A -ENVELOPE_FINE = $7B -ENVELOPE_COARSE = $7C +; pt3 player registers +AY_REGISTERS = $70 +A_FINE_TONE = $70 +A_COARSE_TONE = $71 +B_FINE_TONE = $72 +B_COARSE_TONE = $73 +C_FINE_TONE = $74 +C_COARSE_TONE = $75 +NOISE = $76 +ENABLE = $77 +PT3_MIXER_VAL = $77 +A_VOLUME = $78 +B_VOLUME = $79 +C_VOLUME = $7A +ENVELOPE_FINE = $7B +ENVELOPE_COARSE = $7C ENVELOPE_SHAPE = $7D +PATTERN_L = $7E +PATTERN_H = $7F -COPY_OFFSET = $7E -DECODER_STATE = $7F +.if 0 +; ym player +CURRENT_FRAME_L = $70 +CURRENT_FRAME_H = $71 +BASE_FRAME_L = $72 +BASE_FRAME_H = $73 +CURRENT_CHUNK = $74 +TIME_MINUTES = $75 +TIME_SECONDS = $76 +CURSOR_X = $77 +CURSOR_Y = $78 +LEVEL_OVER = $7B + LEVEL_FAIL = 1 + LEVEL_WIN = 2 +DOOR_OPEN = $7C +CHUNK_NEXT_LOAD = $7D +CHUNK_NEXT_PLAY = $7E +LOAD_NEXT_CHUNK = $7F +.endif -REGISTER_DUMP2 = $80 -A_FINE_TONE2 = $80 -A_COARSE_TONE2 = $81 -B_FINE_TONE2 = $82 -B_COARSE_TONE2 = $83 -C_FINE_TONE2 = $84 -C_COARSE_TONE2 = $85 -NOISE2 = $86 -ENABLE2 = $87 -A_VOLUME2 = $88 -B_VOLUME2 = $89 -C_VOLUME2 = $8A -ENVELOPE_FINE2 = $8B -ENVELOPE_COARS2 = $8C -ENVELOPE_SHAPE2 = $8D -LYRICSL = $8E -LYRICSH = $8F +; rest of pt3_player +; rest of pt3_player +PT3_TEMP = $80 +ORNAMENT_L = $81 +ORNAMENT_H = $82 +SAMPLE_L = $83 +SAMPLE_H = $84 +LOOP = $85 +MB_VALUE = $86 +MB_ADDR_L = $87 +MB_ADDR_H = $88 +DONE_PLAYING = $89 +DONE_SONG = $8A +APPLEII_MODEL = $8B +SOUND_STATUS = $8C + SOUND_DISABLED = $80 + SOUND_IN_LC = $01 ; $01 sound effects in language card + SOUND_MOCKINGBOARD = $02 ; mockingboard detected +DISP_PAGE = $8D +DRAW_PAGE = $8E + +;TIMER_COUNT = $86 +;WHICH_SLOT = $88 + -FRAME_COUNT = $90 -MB_VALUE = $91 -MB_ADDRL = $91 -MB_ADDRH = $92 -DONE_PLAYING = $93 -MB_CHUNK_OFFSET = $94 -MB_FRAME = $94 -MB_PATTERN = $95 -CHUNKSIZE = $95 -LZ4_DONE = $96 -DECODE_ERROR = $97 -COPY_TIME = $98 -DECOMPRESS_TIME = $99 -TIME_TAKEN = $9A -LYRICS_ACTIVE = $9B -;FORTYCOL = $9C -CURSOR = $9D ; More zero-page addresses ; we try not to conflict with anything DOS, MONITOR or BASIC related @@ -143,8 +140,6 @@ HGR_COLOR = $E4 ;NAMEX = $EB ;CHAR = $EC STATE = $ED -DISP_PAGE = $ED -DRAW_PAGE = $EE OFFSET = $EF ;FIRST = $F0 diff --git a/music/zero_wing/zw.s b/music/zero_wing/zw.s index fed56605..96c99778 100644 --- a/music/zero_wing/zw.s +++ b/music/zero_wing/zw.s @@ -4,13 +4,226 @@ .include "zp.inc" .include "hardware.inc" +.include "qload.inc" +.include "music.inc" + +zw_start: + ;===================== + ; initializations + ;===================== + + ;===================== + ; detect model + ;===================== + + jsr detect_appleii_model + + ;===================== + ; Machine workarounds + ;===================== + ; mostly IIgs + ; thanks to 4am for this code from total replay + + lda ROM_MACHINEID + cmp #$06 + bne not_a_iigs + sec + jsr $FE1F ; check for IIgs + bcs not_a_iigs + + ; gr/text page2 handling broken on early IIgs models + ; this enables the workaround + + jsr ROM_TEXT2COPY ; set alternate display mode on IIgs + cli ; enable VBL interrupts + + ; also set background color to black instead of blue + lda NEWVIDEO + and #%00011111 ; bit 7 = 0 -> IIgs Apple II-compat video modes + ; bit 6 = 0 -> IIgs 128K memory map same as IIe + ; bit 5 = 0 -> IIgs DHGR is color, not mono + ; bits 0-4 unchanged + sta NEWVIDEO + lda #$F0 + sta TBCOLOR ; white text on black background + lda #$00 + sta CLOCKCTL ; black border + sta CLOCKCTL ; set twice for VidHD + +not_a_iigs: -hires_start: ;=================== - ; set graphics mode + ; restart? ;=================== - jsr HOME +restart: + lda #0 + sta DRAW_PAGE + + ;=================== + ; show title screen + ;=================== + + jsr show_title + + + ;=================== + ; print config + ;=================== + + jsr set_normal + + lda #config_string + sta OUTH + + jsr move_and_print + + ; print detected model + + lda APPLEII_MODEL + ora #$80 + sta $7d0+8 ; 23,8 + + ; if GS print the extra S + cmp #'G'|$80 + bne not_gs + lda #'S'|$80 + sta $7d0+9 + +not_gs: + + ;========================================= + ; detect if we have a language card (64k) + ;=================================== + ; we might want to later load sound high, + ; for now always enable sound + + + lda #0 + sta SOUND_STATUS ; clear out, sound enabled + + jsr detect_language_card + bcs no_language_card + +yes_language_card: + ; update status on title screen + lda #'6'|$80 + sta $7d0+11 ; 23,11 + lda #'4'|$80 + sta $7d0+12 ; 23,12 + + ; update sound status + lda SOUND_STATUS + ora #SOUND_IN_LC + sta SOUND_STATUS + +; jmp done_language_card + +no_language_card: + +done_language_card: + + ;=================================== + ; Detect Mockingboard + ;=================================== + + ; detect mockingboard + jsr mockingboard_detect + + bcc mockingboard_notfound + +mockingboard_found: + ; print detected location + + lda #'S'+$80 ; change NO to slot + sta $7d0+30 + + lda MB_ADDR_H ; $C4 = 4, want $B4 1100 -> 1011 + and #$87 + ora #$30 + + sta $7d0+31 ; 23,31 + + + ; for now, don't require language card + lda SOUND_STATUS + and #SOUND_IN_LC + beq dont_enable_mc + + lda SOUND_STATUS + ora #SOUND_MOCKINGBOARD + sta SOUND_STATUS + + ;================================== + ; load sound into the language card + ; into $D000 set 1 + ;================================== + + ; read/write RAM, use $d000 bank1 + bit $C083 + bit $C083 + + lda #1 + sta WHICH_LOAD + + jsr load_file + + lda #0 + sta DONE_PLAYING + + lda #1 + sta LOOP + + ; patch mockingboard + + jsr mockingboard_patch ; patch to work in slots other than 4? + + ;======================= + ; Set up 50Hz interrupt + ;======================== + + jsr mockingboard_init + jsr mockingboard_setup_interrupt + + ;============================ + ; Init the Mockingboard + ;============================ + + jsr reset_ay_both + jsr clear_ay_both + + ;================== + ; init song + ;================== + + jsr pt3_init_song + + ;======================= + ; start music + ;======================= + + cli + + + + +dont_enable_mc: + +mockingboard_notfound: + +skip_all_checks: + + + ;======================= + ; wait for keypress + ;======================= + +; jsr wait_until_keypress + + lda #25 + jsr wait_a_bit @@ -19,13 +232,18 @@ hires_start: ;=================== load_loop: - jsr HGR +; jsr HGR + bit SET_GR + bit HIRES + bit TEXTGR + bit PAGE0 + ;============================= ; In AD... ;============================= - jsr HOME + jsr clear_bottom lda #