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games: lemm: music sorta working

This commit is contained in:
Vince Weaver 2022-03-05 23:25:44 -05:00
parent 7095b76a6c
commit a63540bc21
15 changed files with 1330 additions and 160 deletions
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4
demos/vertical_scroll2/Makefile
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@ -28,7 +28,7 @@ HELLO: hello.bas
SCROLLER: scroller.o
ld65 -o SCROLLER scroller.o -C ../../linker_scripts/apple2_1000.inc
scroller.o: scroller.s gr_copy.s gr_unrle.s gr_unrle_large.s \
scroller.o: scroller.s gr_copy.s \
gr_copy_large.s \
zp.inc hardware.inc spaceman.lzsa spaceman2.lzsa
ca65 -o scroller.o scroller.s -l scroller.lst
@ -38,7 +38,7 @@ scroller.o: scroller.s gr_copy.s gr_unrle.s gr_unrle_large.s \
DSR_INTRO: dsr_intro.o
ld65 -o DSR_INTRO dsr_intro.o -C ../../linker_scripts/apple2_1000.inc
dsr_intro.o: dsr_intro.s gr_copy.s gr_unrle.s gr_unrle_large.s \
dsr_intro.o: dsr_intro.s gr_copy.s \
gr_copy_large.s \
zp.inc hardware.inc desire.lzsa desire2.lzsa
ca65 -o dsr_intro.o dsr_intro.s -l dsr_intro.lst

3
games/lemm/Makefile
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@ -27,7 +27,8 @@ LEMM_TEST: lemm_test.o
ld65 -o LEMM_TEST lemm_test.o -C ../../linker_scripts/apple2_4000.inc
lemm_test.o: lemm_test.s zp.inc hardware.inc \
graphics/graphics_test.inc
graphics/graphics_test.inc \
interrupt_handler.s
ca65 -o lemm_test.o lemm_test.s -l lemm_test.lst
####

5
games/lemm/gr_offsets.s Normal file
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@ -0,0 +1,5 @@
gr_offsets:
.word $400,$480,$500,$580,$600,$680,$700,$780
.word $428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8
.word $450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0

2
games/lemm/hello.bas
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@ -12,4 +12,4 @@
110 PRINT " A \/\/\/ SOFTWARE PRODUCTION"
115 PRINT
120 PRINT " HTTP://WWW.DEATER.NET/WEAVE/VMWPROD"
130 PRINT CHR$(4)"CATALOG"
130 PRINT CHR$(4)"BRUN LEMM_TEST"

152
games/lemm/interrupt_handler.s Normal file
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@ -0,0 +1,152 @@
;================================
;================================
; 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)
pt3_irq_smc1:
bit MOCK_6522_T1CL ; clear 6522 interrupt by reading T1C-L ; 4
lda DONE_PLAYING ; 3
beq ym_play_music ; if song done, don't play music ; 3/2nt
jmp done_pt3_irq_handler ; 3
;============
; 13
ym_play_music:
lda BASE_FRAME_L
sta CURRENT_FRAME_L
lda BASE_FRAME_H
sta CURRENT_FRAME_H
ldx #0
frame_loop:
ldy #0
lda (CURRENT_FRAME_L),Y
jsr update_register
clc
lda CURRENT_FRAME_H
adc #$4
sta CURRENT_FRAME_H
inx
cpx #12
bne frame_loop
inc BASE_FRAME_L
bne not_oflo
inc BASE_FRAME_H
lda BASE_FRAME_H
cmp #$D4
bne not_oflo
; FIXME: handle out of data properly
lda #$D0
sta BASE_FRAME_H
not_oflo:
jmp done_pt3_update_register
update_register:
pt3_irq_smc2:
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
stx MOCK_6522_ORA2 ; put address on PA2 ; 4
ldy #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
pt3_irq_smc3:
sty MOCK_6522_ORB1 ; latch_address on PB1 ; 4
sty MOCK_6522_ORB2 ; latch_address on PB2 ; 4
ldy #MOCK_AY_INACTIVE ; go inactive ; 2
pt3_irq_smc4:
sty MOCK_6522_ORB1 ; 4
sty MOCK_6522_ORB2 ; 4
; value
pt3_irq_smc5:
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
sta MOCK_6522_ORA2 ; put value on PA2 ; 4
lda #MOCK_AY_WRITE ; ; 2
pt3_irq_smc6:
sta MOCK_6522_ORB1 ; write on PB1 ; 4
sty MOCK_6522_ORB1 ; 4
pt3_irq_smc7:
sta MOCK_6522_ORB2 ; write on PB2 ; 4
sty MOCK_6522_ORB2 ; 4
rts
done_pt3_update_register:
done_pt3_irq_handler:
jmp exit_interrupt
;=================================
; Finally done with this interrupt
;=================================
quiet_exit:
stx DONE_PLAYING
jsr clear_ay_both
ldx #$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

322
games/lemm/lemm_test.s
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@ -7,18 +7,15 @@
.include "hardware.inc"
lemm_test_start:
;===================
; init screen
;===================
jsr TEXT
jsr HOME
bit KEYRESET
lda #0
sta DRAW_PAGE
bit SET_GR
bit PAGE0
bit HIRES
bit FULLGR
;====================
; detect model
;====================
jsr detect_appleii_model
;===================
; machine workarounds
@ -55,6 +52,192 @@ lemm_test_start:
not_a_iigs:
;===================
; print config
;===================
lda #<config_string
sta OUTL
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)
; and load sound into it if possible
;===================================
lda #0
sta SOUND_STATUS ; clear out, sound enabled
;===========================================
; skip checks if open-apple being held down
lda $C061
and #$80 ; only bit 7 is affected
bne skip_all_checks ; rest is floating bus
jsr detect_language_card
bcs no_language_card
yes_language_card:
; update status
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
;===================================
PT3_ENABLE_APPLE_IIC = 1
; 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
; NOTE: in this game we need both language card && mockingboard
; to enable mockingboard music
lda SOUND_STATUS
and #SOUND_IN_LC
beq dont_enable_mc
lda SOUND_STATUS
ora #SOUND_MOCKINGBOARD
sta SOUND_STATUS
dont_enable_mc:
mockingboard_notfound:
skip_all_checks:
;==================================
; load music into the language card
; into $D000 set 2
;==================================
; switch in language card
; read/write RAM, $d000 bank 2
lda $C083
lda $C083
; lda $C081 ; enable ROM
; lda $C081 ; enable write
; actually load it
lda #<lemm5_part1_lzsa
sta getsrc_smc+1 ; LZSA_SRC_LO
lda #>lemm5_part1_lzsa
sta getsrc_smc+2 ; LZSA_SRC_HI
lda #$d0
jsr decompress_lzsa2_fast
lda #0
sta DONE_PLAYING
sta BASE_FRAME_L
lda #$D0
sta BASE_FRAME_H
lda #1
sta LOOP
jsr mockingboard_patch ; patch to work in slots other than 4?
;=======================
; Set up 50Hz interrupt
;========================
jsr mockingboard_init
jsr mockingboard_setup_interrupt
zurg:
;============================
; Init the Mockingboard
;============================
jsr reset_ay_both
jsr clear_ay_both
;=======================
; start music
;=======================
jsr wait_until_keypress
cli
;===================
; init screen
;===================
; jsr TEXT ; can't, swapped ROM out
; jsr HOME
bit KEYRESET
bit SET_GR
bit PAGE0
bit HIRES
bit FULLGR
;===================
; Load hires graphics
;===================
@ -97,91 +280,6 @@ load_graphics_loop:
jmp load_graphics_loop
;===================================
; detect if we have a language card
; and load sound into it if possible
;===================================
; lda #0
; sta SOUND_STATUS ; clear out, sound enabled
; jsr detect_language_card
; bcs no_language_card
; update sound status
; lda SOUND_STATUS
; ora #SOUND_IN_LC
; sta SOUND_STATUS
; load sounds into LC
; read ram, write ram, use $d000 bank1
; bit $C08B
; bit $C08B
; lda #<linking_noise_compressed
; sta getsrc_smc+1
; lda #>linking_noise_compressed
; sta getsrc_smc+2
; lda #$D0 ; decompress to $D000
; jsr decompress_lzsa2_fast
;blah:
; read rom, nowrite, use $d000 bank1
; bit $C08A
no_language_card:
;===================================
; Setup Mockingboard
;===================================
; lda #0
; sta DONE_PLAYING
; sta LOOP
; detect mockingboard
; jsr mockingboard_detect
; bcc mockingboard_notfound
mockingboard_found:
;; jsr mockingboard_patch ; patch to work in slots other than 4?
; lda SOUND_STATUS
; ora #SOUND_MOCKINGBOARD
; sta SOUND_STATUS
;=======================
; 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
; jmp done_setup_sound
mockingboard_notfound:
done_setup_sound:
@ -192,21 +290,36 @@ done_setup_sound:
; .include "gr_pageflip.s"
; .include "gr_copy.s"
; .include "wait_a_bit.s"
; .include "gr_offsets.s"
.include "gr_offsets.s"
.include "decompress_fast_v2.s"
.include "wait_keypress.s"
; .include "print_help.s"
; .include "gr_fast_clear.s"
; .include "text_print.s"
.include "text_print.s"
; .include "init_vars.s"
; .include "graphics_title/title_graphics.inc"
; .include "lc_detect.s"
.include "lc_detect.s"
; pt3 player
;.include "pt3_lib_mockingboard.inc"
.include "pt3_lib_detect_model.s"
.include "pt3_lib_mockingboard_detect.s"
.include "pt3_lib_mockingboard_setup.s"
.include "interrupt_handler.s"
.include "pt3_lib_mockingboard_patch.s"
config_string:
; 0123456789012345678901234567890123456789
.byte 0,23,"APPLE II?, 48K, MOCKINGBOARD: NO, SSI: N",0
; MOCKINGBOARD: NONE
; .include "pt3_lib_core.s"
; .include "pt3_lib_init.s"
; .include "interrupt_handler.s"
@ -219,15 +332,6 @@ new_title:
;PT3_LOC = theme_music
;.align $100
;theme_music:
;.incbin "audio/theme.pt3"
lemm5_part1_lzsa:
.incbin "music/lemm5.part1.lzsa"

90
games/lemm/music/Makefile
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@ -1,71 +1,69 @@
LZSA = ~/research/lzsa/lzsa/lzsa
YM5_TO_RAW = ~/research/vmw-meter.git/ay-3-8910/conversion_tools/ym5_to_raw
YM_TO_YM5 = ~/research/vmw-meter.git/ay-3-8910/conversion_tools/ym_to_ym5
RAW_INTERLEAVE = ~/research/vmw-meter.git/ay-3-8910/conversion_tools/raw_interleave
all: lemm5.part1.lzsa lemm5.part2.lzsa lemm5.part3.lzsa
# lemm5.part4.lzsa lemm5.part5.lzsa lemm5.part6.lzsa \
# lemm5.part7.lzsa lemm5.part8.lzsa
lemm5.raw: lemm5.ym
$(YM5_TO_RAW) ./lemm5.ym > lemm5.raw
lemm5.part1: lemm5.raw
$(RAW_INTERLEAVE) -m 11 -c 1024 ./lemm5
lemm5.part1.lzsa: lemm5.part1
$(LZSA) -r -f2 lemm5.part1 lemm5.part1.lzsa
#lemm5.part2: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part2 bs=4096 count=1 seek=1 skip=1
lemm5.part2.lzsa: lemm5.part2
$(LZSA) -r -f2 lemm5.part2 lemm5.part2.lzsa
all: lemmings5.part1.lzsa lemmings5.part2.lzsa lemmings5.part3.lzsa \
lemmings5.part4.lzsa lemmings5.part5.lzsa lemmings5.part6.lzsa \
lemmings5.part7.lzsa lemmings5.part8.lzsa
#lemm5.part3: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part3 bs=4096 count=1 seek=2 skip=2
Lemmings5.raw: Lemmings5.ym
$(YM5_TO_RAW) ./Lemmings5.ym > Lemmings5.raw
lemm5.part3.lzsa: lemm5.part3
$(LZSA) -r -f2 lemm5.part3 lemm5.part3.lzsa
lemmings5.part1: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part1 bs=4096 count=1 seek=0 skip=0
#lemm5.part4: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part4 bs=4096 count=1 seek=3 skip=3
lemmings5.part1.lzsa: lemmings5.part1
$(LZSA) -r -f2 lemmings5.part1 lemmings5.part1.lzsa
#lemm5.part4.lzsa: lemm5.part4
# $(LZSA) -r -f2 lemm5.part4 lemm5.part4.lzsa
lemmings5.part2: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part2 bs=4096 count=1 seek=1 skip=1
#lemm5.part5: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part5 bs=4096 count=1 seek=4 skip=4
lemmings5.part2.lzsa: lemmings5.part2
$(LZSA) -r -f2 lemmings5.part2 lemmings5.part2.lzsa
#lemm5.part5.lzsa: lemm5.part5
# $(LZSA) -r -f2 lemm5.part5 lemm5.part5.lzsa
lemmings5.part3: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part3 bs=4096 count=1 seek=2 skip=2
#lemm5.part6: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part6 bs=4096 count=1 seek=5 skip=5
lemmings5.part3.lzsa: lemmings5.part3
$(LZSA) -r -f2 lemmings5.part3 lemmings5.part3.lzsa
#lemm5.part6.lzsa: lemm5.part6
# $(LZSA) -r -f2 lemm5.part1 lemm5.part1.lzsa
lemmings5.part4: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part4 bs=4096 count=1 seek=3 skip=3
#lemm5.part7: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part7 bs=4096 count=1 seek=6 skip=6
lemmings5.part4.lzsa: lemmings5.part4
$(LZSA) -r -f2 lemmings5.part4 lemmings5.part4.lzsa
#lemm5.part7.lzsa: lemm5.part7
# $(LZSA) -r -f2 lemm5.part7 lemm5.part7.lzsa
lemmings5.part5: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part5 bs=4096 count=1 seek=4 skip=4
#lemm5.part8: lemm5.raw
# dd conv=notrunc if=lemm5.raw of=lemm5.part8 bs=4096 count=1 seek=7 skip=7
lemmings5.part5.lzsa: lemmings5.part5
$(LZSA) -r -f2 lemmings5.part5 lemmings5.part5.lzsa
lemmings5.part6: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part6 bs=4096 count=1 seek=5 skip=5
lemmings5.part6.lzsa: lemmings5.part6
$(LZSA) -r -f2 lemmings5.part1 lemmings5.part1.lzsa
lemmings5.part7: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part7 bs=4096 count=1 seek=6 skip=6
lemmings5.part7.lzsa: lemmings5.part7
$(LZSA) -r -f2 lemmings5.part7 lemmings5.part7.lzsa
lemmings5.part8: Lemmings5.raw
dd conv=notrunc if=Lemmings5.raw of=lemmings5.part8 bs=4096 count=1 seek=7 skip=7
lemmings5.part8.lzsa: lemmings5.part8
$(LZSA) -r -f2 lemmings5.part8 lemmings5.part8.lzsa
#lemm5.part8.lzsa: lemm5.part8
# $(LZSA) -r -f2 lemm5.part8 lemm5.part8.lzsa
clean:

0
games/lemm/music/Lemmings5.ym → games/lemm/music/lemm5.ym
View File

63
games/lemm/pt3_lib_detect_model.s Normal file
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@ -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

54
games/lemm/pt3_lib_mockingboard.inc Normal file
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@ -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

222
games/lemm/pt3_lib_mockingboard_detect.s Normal file
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@ -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

120
games/lemm/pt3_lib_mockingboard_patch.s Normal file
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@ -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 $1D85
ldx MB_ADDR_H
ldy #0
lda #<mockingboard_init
sta MB_ADDR_L
lda #>mockingboard_init
sta MB_ADDR_H
mb_patch_loop:
lda (MB_ADDR_L),Y
cmp #$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 #<done_pt3_irq_handler
bne mb_patch_loop
mb_patch_done:
rts

299
games/lemm/pt3_lib_mockingboard_setup.s Normal file
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@ -0,0 +1,299 @@
; 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 = $7 ; 1 1 1
;========================
; Mockingboard Init
;========================
; Initialize the 6522s
; set the data direction for all pins of PortA/PortB to be output
mockingboard_init:
lda #$ff ; all output (1)
mock_init_smc1:
sta MOCK_6522_DDRB1
sta MOCK_6522_DDRA1
mock_init_smc2:
sta MOCK_6522_DDRB2
sta MOCK_6522_DDRA2
rts
;===================================
;===================================
; Reset Both AY-3-8910s
;===================================
;===================================
;======================
; Reset Left AY-3-8910
;======================
reset_ay_both:
lda #MOCK_AY_RESET
reset_ay_smc1:
sta MOCK_6522_ORB1
lda #MOCK_AY_INACTIVE
reset_ay_smc2:
sta MOCK_6522_ORB1
;======================
; Reset Right AY-3-8910
;======================
;reset_ay_right:
;could be merged with both
lda #MOCK_AY_RESET
reset_ay_smc3:
sta MOCK_6522_ORB2
lda #MOCK_AY_INACTIVE
reset_ay_smc4:
sta MOCK_6522_ORB2
rts
; Write sequence
; Inactive -> 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
;.ifdef PT3_ENABLE_APPLE_IIC
; lda APPLEII_MODEL
; cmp #'C'
; bne done_iic_hack
; bypass the firmware interrupt handler
; should we do this on IIe too? probably faster
; first we have to copy the ROM to the language card
.if 0
sei ; disable interrupts
copy_rom_loop:
lda $c089 ; read ROM, write RAM1
lda $c089
ldy #0
read_rom_loop:
lda $D000,Y
sta $400,Y ; note this uses text page as
; temporary data store
iny
bne read_rom_loop
lda $c08B ; read/write RAM1
lda $c08B ;
write_rom_loop:
lda $400,Y
sta $D000,Y
iny
bne write_rom_loop
inc read_rom_loop+2
inc write_rom_loop+5
bne copy_rom_loop
.endif
lda #<interrupt_handler
sta $fffe
lda #>interrupt_handler
sta $ffff
; nop out the "lda $45" in the irq handler
lda #$EA
sta interrupt_smc
sta interrupt_smc+1
;.endif
done_iic_hack:
;=========================
; Setup Interrupt Handler
;=========================
; Vector address goes to 0x3fe/0x3ff
; FIXME: should chain any existing handler
lda #<interrupt_handler
sta $03fe
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

145
games/lemm/text_print.s Normal file
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@ -0,0 +1,145 @@
;================================
; move_and_print
;================================
; get X,Y from OUTL/OUTH
; then print following string to that address
; stop at NUL
; convert to APPLE ASCII (or with 0x80)
; leave OUTL/OUTH pointing to next string
move_and_print:
ldy #0
lda (OUTL),Y
sta CH
iny
lda (OUTL),Y
asl
tay
lda gr_offsets,Y ; lookup low-res memory address
clc
adc CH ; add in xpos
sta BASL ; store out low byte of addy
lda gr_offsets+1,Y ; look up high byte
adc DRAW_PAGE ;
sta BASH ; and store it out
; BASH:BASL now points at right place
clc
lda OUTL
adc #2
sta OUTL
lda OUTH
adc #0
sta OUTH
;================================
; print_string
;================================
print_string:
ldy #0
print_string_loop:
lda (OUTL),Y
beq done_print_string
ps_smc1:
and #$3f ; make sure we are inverse
sta (BASL),Y
iny
bne print_string_loop
done_print_string:
iny
clc
tya
adc OUTL
sta OUTL
lda OUTH
adc #0
sta OUTH
rts
.if 0
;================================
; move and print a list of lines
;================================
move_and_print_list:
jsr move_and_print
ldy #0
lda (OUTL),Y
bpl move_and_print_list
rts
;================================
; move and print a list of lines
;================================
move_and_print_list_both_pages:
lda DRAW_PAGE
pha
lda OUTL
pha
lda OUTH
pha
lda #0
sta DRAW_PAGE
jsr move_and_print_list
pla
sta OUTH
pla
sta OUTL
lda #4
sta DRAW_PAGE
jsr move_and_print_list
pla
sta DRAW_PAGE
rts
;=======================
; print to both pages
;=======================
print_both_pages:
lda DRAW_PAGE
pha
lda OUTL
pha
lda OUTH
pha
lda #0
sta DRAW_PAGE
jsr move_and_print
pla
sta OUTH
pla
sta OUTL
lda #4
sta DRAW_PAGE
jsr move_and_print
pla
sta DRAW_PAGE
rts
.endif

9
games/lemm/zp.inc
View File

@ -45,6 +45,13 @@ IN_RIGHT = $6B
BTC_L = $6C
BTC_H = $6D
CURRENT_FRAME_L = $70
CURRENT_FRAME_H = $71
BASE_FRAME_L = $72
BASE_FRAME_H = $73
; pt3 player registers
REGISTER_DUMP = $70
AY_REGISTERS = $70
@ -90,7 +97,7 @@ LASER_OUT = $87
LASER_X = $88
LASER_Y = $89
LASER_DIRECTION = $8A
TILEMAP_X = $8B
APPLEII_MODEL = $8B
TILEMAP_Y = $8C
DUKE_FOOT_OFFSET = $8D