interlace: merge in newer pt3 library

This commit is contained in:
Vince Weaver 2019-09-12 23:05:36 -04:00
parent 0d8ff09550
commit d42eee8c5c
6 changed files with 2511 additions and 179 deletions

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@ -45,7 +45,7 @@ RASTERBARS_SOUND: rasterbars_sound.o
rasterbars_sound.o: rasterbars_sound.s gr_copy.s \
rasterbars_screen.s rasterbars_table.s movement_table.s rb_bg.inc \
pt3_lib_ci.s mockingboard_a.s
pt3_lib_ci.s pt3_lib_init.s pt3_lib_mockingboard.s
ca65 -o rasterbars_sound.o rasterbars_sound.s -l rasterbars_sound.lst

File diff suppressed because it is too large Load Diff

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@ -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+1
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+1
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+1
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 ofte 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+1
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

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@ -74,15 +74,6 @@ reset_ay_both:
rts
;=======================================
; clear ay -- clear all 14 AY registers
; should silence the card
;=======================================
clear_ay_both:
ldx #14
lda #0
sta MB_VALUE_smc+1
clear_ay_left_loop:
; Write sequence
; Inactive -> Latch Address -> Inactive -> Write Data -> Inactive
@ -104,8 +95,7 @@ write_ay_both:
sty MOCK_6522_ORB2 ; 3
; value
MB_VALUE_smc:
lda #$d1 ; 2
lda MB_VALUE ; 3
sta MOCK_6522_ORA1 ; put value on PA1 ; 3
sta MOCK_6522_ORA2 ; put value on PA2 ; 3
lda #MOCK_AY_WRITE ; ; 2
@ -114,8 +104,19 @@ MB_VALUE_smc:
sty MOCK_6522_ORB1 ; 3
sty MOCK_6522_ORB2 ; 3
rts ; 6
;===========
; 44
; 51
;=======================================
; clear ay -- clear all 14 AY registers
; should silence the card
;=======================================
clear_ay_both:
ldx #14
lda #0
sta MB_VALUE
clear_ay_left_loop:
jsr write_ay_both
dex
bpl clear_ay_left_loop
rts
@ -143,11 +144,11 @@ mb_detect_loop: ; self-modifying
mb_check_cycle_loop:
lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
; count down
sta TEMP ; 3 cycles
sta PT3_TEMP ; 3 cycles
lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
; between the two accesses to the timer
sec
sbc TEMP ; subtract to see if we had 8 cycles
sbc PT3_TEMP ; subtract to see if we had 8 cycles
cmp #$f8 ; -8
bne mb_not_in_this_slot
dex ; decrement, try one more time
@ -221,11 +222,11 @@ mb4_detect_loop: ; self-modifying
mb4_check_cycle_loop:
lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
; count down
sta TEMP ; 3 cycles
sta PT3_TEMP ; 3 cycles
lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
; between the two accesses to the timer
sec
sbc TEMP ; subtract to see if we had 8 cycles
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
@ -238,103 +239,144 @@ mb4_not_in_this_slot:
ldx #00
beq done_mb4_detect
.align $100
;====================================
; mb_write_frame
;====================================
; cycle counted
; 2 + 13*(70) + 74 + 5 = 991
mb_write_frame:
ldx #0 ; set up reg count ; 2
;============
; 2
;==================================
; loop through the 14 registers
; reading the value, then write out
;==================================
mb_write_loop:
.if 0
;=============================
; not r13 -- 4+5+28+26+7 = 70
; r13, not ff -- 4+5+ 4 +28+26+7 = 74
; r13 is ff -- 4+5+3+1=[61] = 74
; Setup
;=============================
pt3_setup_interrupt:
;===========================
; Check for Apple IIc
;===========================
; it does interrupts differently
lda $FBB3 ; IIe and newer is $06
cmp #6
beq apple_iie_or_newer
jmp done_apple_detect
apple_iie_or_newer:
lda $FBC0 ; 0 on a IIc
bne done_apple_detect
apple_iic:
; activate IIc mockingboard?
; this might only be necessary to allow detection
; I get the impression the Mockingboard 4c activates
; when you access any of the 6522 ports in Slot 4
lda #$ff
sta $C403
sta $C404
; bypass the firmware interrupt handler
; should we do this on IIe too? probably faster
sei ; disable interrupts
lda $c08b ; disable ROM (enable language card)
lda $c08b
lda #<interrupt_handler
sta $fffe
lda #>interrupt_handler
sta $ffff
lda #$EA ; nop out the "lda $45" in the irq hand
sta interrupt_smc
sta interrupt_smc+1
done_apple_detect:
lda AY_REGISTERS,X ; load register value ; 4
;=========================
; Setup Interrupt Handler
;=========================
; Vector address goes to 0x3fe/0x3ff
; FIXME: should chain any existing handler
; special case R13. If it is 0xff, then don't update
; otherwise might spuriously reset the envelope settings
lda #<interrupt_handler
sta $03fe
lda #>interrupt_handler
sta $03ff
cpx #13 ; 2
bne mb_not_13 ; 3
;============================
; Enable 50Hz clock on 6522
;============================
; -1
cmp #$ff ; 2
bne mb_not_13 ; 3
; -1
sei ; disable interrupts just in case
lda #$40 ; Continuous interrupts, don't touch PB7
sta $C40B ; ACR register
lda #$7F ; clear all interrupt flags
sta $C40E ; IER register (interrupt enable)
lda #$C0
sta $C40D ; IFR: 1100, enable interrupt on timer one oflow
sta $C40E ; IER: 1100, enable timer one interrupt
lda #$E7
sta $C404 ; write into low-order latch
lda #$4f
sta $C405 ; write into high-order latch,
; load both values into counter
; clear interrupt and start counting
; 4fe7 / 1e6 = .020s, 50Hz
rts
.endif
; delay 61
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
lda TEMP ; 3
jmp mb_skip_13 ; 3
;==================================
; Print mockingboard detect message
;==================================
; note: on IIc must do this before enabling interrupt
; as we disable ROM (COUT won't work?)
mb_not_13:
print_mockingboard_detect:
; print detection message
ldy #0
print_mocking_message:
lda mocking_message,Y ; load loading message
beq done_mocking_message
ora #$80
jsr COUT
iny
jmp print_mocking_message
done_mocking_message:
jsr CROUT1
rts
print_mocking_notfound:
ldy #0
print_not_message:
lda not_message,Y ; load loading message
beq print_not_message_done
ora #$80
jsr COUT
iny
jmp print_not_message
print_not_message_done:
rts
print_mocking_found:
ldy #0
print_found_message:
lda found_message,Y ; load loading message
beq done_found_message
ora #$80
jsr COUT
iny
jmp print_found_message
done_found_message:
rts
;=========
; strings
;=========
mocking_message: .asciiz "LOOKING FOR MOCKINGBOARD IN SLOT #4"
not_message: .byte "NOT "
found_message: .asciiz "FOUND"
; address
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
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
sty MOCK_6522_ORB1 ; 4
sty MOCK_6522_ORB2 ; 4
;==========
; 28
; value
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
sta MOCK_6522_ORA2 ; put value on PA2 ; 4
lda #MOCK_AY_WRITE ; ; 2
sta MOCK_6522_ORB1 ; write on PB1 ; 4
sta MOCK_6522_ORB2 ; write on PB2 ; 4
sty MOCK_6522_ORB1 ; 4
sty MOCK_6522_ORB2 ; 4
;===========
; 26
mb_no_write:
inx ; point to next register ; 2
cpx #14 ; if 14 we're done ; 2
bmi mb_write_loop ; otherwise, loop ; 3
;============
; 7
mb_skip_13:
; -1
rts ; 6
pt3_loop_smc:
.byte $0,$0

View File

@ -11,6 +11,8 @@
PT3_LOC = song
PT3_USE_ZERO_PAGE = 1
start_rasterbars:
;===================
@ -30,72 +32,12 @@ start_rasterbars:
lda #1
sta LOOP
;=================
; Configure mockingboard
;============================
; Check for Apple II/II+/IIc
;============================
lda $FBB3 ; IIe and newer is $06
cmp #6
beq apple_iie_or_newer
; Apple II/II+
bne done_apple_detect
apple_iie_or_newer:
lda $FBC0 ; 0 on a IIc
bne done_apple_detect
apple_iic:
; activate IIc mockingboard?
; this might only be necessary to allow detection
; I get the impression the Mockingboard 4c activates
; when you access any of the 6522 ports in Slot 4
lda #$ff
sta $C403
sta $C404
done_apple_detect:
;=======================
; Detect mockingboard
;========================
; Note, we do this, but then ignore it, as sometimes
; the test fails and then you don't get music.
; In theory this could do bad things if you had something
; easily confused in slot4, but that's probably not an issue.
; print detection message
; lda #<mocking_message ; load loading message
; sta OUTL
; lda #>mocking_message
; sta OUTH
; jsr move_and_print ; print it
jsr mockingboard_detect_slot4 ; call detection routine
cpx #$1
beq mockingboard_found
; lda #<not_message ; if not found, print that
; sta OUTL
; lda #>not_message
; sta OUTH
; inc CV
; jsr move_and_print
; jmp forever_loop ; and wait forever
mockingboard_found:
; lda #<found_message ; print found message
; sta OUTL
; lda #>found_message
; sta OUTH
; inc CV
; jsr move_and_print
jsr mockingboard_detect_slot4
;============================
; Init the Mockingboard
@ -111,7 +53,6 @@ mockingboard_found:
jsr pt3_init_song
;=============================
; Load graphic page0
@ -515,11 +456,14 @@ smc_raster_color1_2:
.include "gr_simple_clear.s"
.include "gr_offsets.s"
.include "gr_unrle.s"
; dummy value for pt3 routines
pt3_loop_smc:
.byte $00,$00
.align $100
.include "rasterbars_table.s"
.include "movement_table.s"
@ -537,8 +481,9 @@ yellow_x: .byte $20
green_x: .byte $30
blue_x: .byte $40
.include "pt3_lib_ci.s"
.include "mockingboard_a.s"
.include "pt3_lib_core.s"
.include "pt3_lib_init.s"
.include "pt3_lib_mockingboard.s"
;=============
; include song

View File

@ -69,19 +69,13 @@ ORNAMENT_H = $03
SAMPLE_L = $04
SAMPLE_H = $05
WHICH_FILE = $63
MB_VALUE = $62
PT3_TEMP = $63
LOOP = $64
MB_ADDRL = $65
MB_ADDRH = $66
DONE_PLAYING = $67
DONE_SONG = $68
FIRE_FB_L = $69
FIRE_FB_H = $6A
FIRE_FB2_L = $6B
FIRE_FB2_H = $6C
FIRE_FB_LINE = $6D
FIRE_Q = $6E
FIRE_Y = $6F
FIRE_X = $70
DISP_PAGE = $71
DRAW_PAGE = $72