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106 lines
2.3 KiB
Plaintext
106 lines
2.3 KiB
Plaintext
;license:MIT
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;(c) 2021 by qkumba/Frank M.
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!cpu 6502
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!to "res/DEMO/NIGHT.STALKER",plain
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*=$a000
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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 #0
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sta $618C ; fix reset
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sta $6198 ; fix IRQ
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lda #1
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sta $618D ; fix reset
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sta $6199 ; fix IRQ
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eor #$A5
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sta $618E ; fix reset checksum
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; (game picks up vectors from un-initialized memory)
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+READ_RAM2_WRITE_RAM2
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jsr EnableAccelerator
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+LOAD_FILE_AT night_stalker, $00
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+READ_ROM_NO_WRITE
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lda #$60
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sta $6017
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sta $603F
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jsr $800
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lda #$92
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sta $0D
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lda #$72
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sta $0C
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lda #$40
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sta $0F
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stx $0E
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jsr $2A8
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lda $c057
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lda $c052
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lda $c050
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ldx #$C0
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txs
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ldx #x_e - x_b
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- lda x_b - 1, x
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sta $1C0,x
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dex
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bne -
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jmp $1C1
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x_b !pseudopc $1C1 {
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jsr $28D
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lda #$D0
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sta $0DEF
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sta $1DC5
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sta $ABC9
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sta $AC6E
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sta $B765
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lda #$4C
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sta $BF00
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sta $BB6B
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ldx #0
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stx $196E
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stx $BF01
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stx $BB6C
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inx
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stx $196F
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stx $BF02
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stx $BB6D
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lda #$60
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sta $1D67
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lda #$A9
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sta $AB30
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ldx #4
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stx $AB31
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dex
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stx $18EE
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stx $0CB8
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stx $0CD2
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lda #$20
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sta $18EC
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sta $0CB6
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sta $0CD0
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lda #$70
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sta $18ED
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lda #$7C
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sta $0CB7
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lda #$85
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sta $0CD1
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ldx #24
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- lda patch, x
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sta $370, x
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dex
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bpl -
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+DISABLE_ACCEL
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jmp $6000
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patch !byte $20,$30,$AB,$CE,$24,$03,$D0,$03,$4C,$00,$01,$60,$AD,$6F,$03,$05,$EA,$60,$8D,$6F,$03,$A2,$FF,$60
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!if * > $282 {
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!error "code is too large, ends at ", *
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}
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}
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x_e
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night_stalker
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!byte 29
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!text "X/NIGHT.STALKER/NIGHT.STALKER"
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