mirror of
https://github.com/a2-4am/4cade.git
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52 lines
1.2 KiB
Plaintext
Executable File
52 lines
1.2 KiB
Plaintext
Executable File
;license:MIT
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;(c) 2019, 2022 by Frank M., qkumba
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!cpu 6502
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!to "build/PRELAUNCH.INDEXED/HEAD.ON",plain
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*=$106
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!source "src/prelaunch/common.a"
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+READ_RAM2_WRITE_RAM2
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jsr EnableAccelerator
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; clobbers $100, sets LC & page 3 reset vectors
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+NEW_RESET_VECTOR $7000
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lda #$4C
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sta $7003 ; JMP not (JMP)
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lda $104
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sta $7004
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lda $105 ; clone actual TR reentry point to $7000
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sta $7005 ; loops between LC and $7000 otherwise
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lda #0
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sta $FFFC
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lda #$70
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sta $FFFD ; LC reset vector fix to $7000
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lda #$4C
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sta $203E
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lda #<callback
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sta $203F
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lda #>callback
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sta $2040
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jmp $2000 ; decompress
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callback
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lda MachineStatus
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and #CHEATS_ENABLED
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beq +
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lda #$a5
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sta $1072 ; patch - don't increase lives
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sta $18B7 ; patch - don't decrease lives
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+
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jsr DisableAccelerator
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+READ_ROM_NO_WRITE
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jmp $6900
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!if * > $1C0 {
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!error "code is too large, ends at ", *
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}
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