rom4x/rom4x/B0_C552_patch_bootfail.s

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.psc02
.code
.include "iic.defs"
.org $c552
jsr setnorm
jsr init
bra cbtfail
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.res coma-*,$ea
bra coma ; Make sure coma routine exists
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.byte 0 ; rom4x present
cbtfail: jsr setvid
jsr setkbd
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lda #$01 ; cmd = boot fail1
jmp $c7fc ; to dispatcher