mirror of https://github.com/a2-4am/4cade.git
76 lines
1.5 KiB
Plaintext
76 lines
1.5 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/RESQ.RAIDERS.MB",plain
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*=$300
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!source "src/constants.a" ; no code in these
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!source "src/macros.a"
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lda #$60
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sta $A37
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jsr $800 ; find and load "DOS"
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ldx #$60
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stx $BFE5
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jsr $BFC8
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lda #$4C
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sta $4047
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+GET_MOCKINGBOARD_SPEECH
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bvs +
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lda #$60
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sta $40FB ; no speech chip, pretend no MB
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+
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lda #$60
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sta $4024
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+DISABLE_ACCEL ; otherwise Mockingboard detection fails
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lda #0
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jsr $4000
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lda #$20
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sta $4024
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lda #$4C
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sta $4110
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sta $411A
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lda #<callback1
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sta $4111
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lda #>callback1
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sta $4112
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lda #<callback2
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sta $411B
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lda #>callback2
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sta $411C
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jsr $4024
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+READ_RAM1_WRITE_RAM1 ; fix crash on //c+
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lda #<reset
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sta $3F2
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sta $FFFC
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lda #>reset
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sta $3F3
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sta $FFFD
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lda #$A6
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sta $3F4
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lda #$4C
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sta $BFE5
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jmp $404A
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reset
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+READ_ROM_NO_WRITE
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jmp $FAA6
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callback1
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sec
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sbc #5
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cmp #2
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bcc +
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- jmp $4144
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+ sec
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jmp $4114
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callback2
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sec
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sbc #5
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cmp #2
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bcs -
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jmp $411E
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