mirror of https://github.com/a2-4am/4cade.git
122 lines
2.9 KiB
Plaintext
122 lines
2.9 KiB
Plaintext
;license:MIT
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;(c) 2020, 2022 by qkumba
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!cpu 6502
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!to "build/PRELAUNCH/BERZAP.MB",plain
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*=$200
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!source "src/constants.a" ; no code in these
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!source "src/macros.a"
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+GET_MOCKINGBOARD_SLOT_AND_MACHINE_STATUS
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and #CHEATS_ENABLED
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beq ++
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php
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lda #$ad
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ldy $3d94
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cpy #$ce
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bne +
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sta $3d94 ; patch - don't decrease lives
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sta $6573 ; patch - don't increase lives
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sta $76b9 ; patch - don't increase lives
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+ ldy $684e
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cpy #$ee
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bne +
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sta $684e ; patch - don't increase lives
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sta $735f ; patch - don't increase lives
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+ ldy $6a70
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cpy #$ee
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bne +
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sta $6a70 ; patch - don't increase lives
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sta $72d7 ; patch - don't increase lives
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+ plp
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++ bcc skipmb
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lda #$0C
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sta $978D
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cpx #$C4
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beq skipslot
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txa
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ldx $3FCD ;find #$C4s
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cpx #$C4
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bne ++
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ldy #0
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- ldx $3FCD,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $3FCD,Y ;Replace #$C4 with detected slot
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+ iny
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bne -
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++ ldx $9743 ;find #$C4s
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cpx #$C4
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bne ++
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- ldx $9743,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $9743,Y ;Replace #$C4 with detected slot
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+ ldx $988D,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $988D,Y ;Replace #$C4 with detected slot
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+ ldx $ACE0,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $ACE0,Y ;Replace #$C4 with detected slot
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+ iny
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bne -
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sta $9A63
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sta $9A6B
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sta $AB1D
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++ ldx $89D5 ;find #$C4s
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cpx #$C4
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bne skipslot
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ldy #0
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- ldx $89D5,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $89D5,Y ;Replace #$C4 with detected slot
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+ ldx $9464,Y ;find #$C4s
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cpx #$C4
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bne +
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sta $9464,Y ;Replace #$C4 with detected slot
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+ iny
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bne -
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skipslot
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jsr setopt
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skipmb
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jmp ($b599)
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setopt
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lda $65AB
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cmp #3
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bne ++
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ldy #0
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sty $382 ; joystick
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ldx #2
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iny
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+READ_RAM2_NO_WRITE
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bit MockingboardStuff
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bmi + ; Sounds / Speech (mono, SC-01)
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dex
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dey
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bvc + ; Sound II / A (stereo, no speech)
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ldx #4
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ldy #2 ; Mockingboard "C"
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+ stx $380
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sty $381
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lda #$0D
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sta $FF
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lda #$30
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sta $385
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lda #$2C
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sta skipslot
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+READ_ROM_NO_WRITE
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++ rts
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