4cade/src/prelaunch/space.rescue.a

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825 B
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;license:MIT
;(c) 2022 by qkumba
!cpu 6502
!to "build/PRELAUNCH.INDEXED/SPACE.RESCUE",plain
*=$106
!source "src/prelaunch/common.a"
+ENABLE_ACCEL
lda #$60
sta $67DE
jsr $4B29 ; decompress
+NEW_RESET_VECTOR $200
; game leaks stack
+READ_RAM2_NO_WRITE
lda MachineStatus
and #CHEATS_ENABLED
beq +
lda #$ad
sta $77A1 ; patch - don't decrease lives
sta $7938 ; patch - don't decrease lives
sta $8243 ; patch - don't increase lives
sta $8726 ; patch - don't decrease fuel
+
jsr DisableAccelerator
+READ_ROM_NO_WRITE
jmp $9500
!if * > $1C0 {
!error "code is too large, ends at ", *
}