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22 lines
581 B
Plaintext
22 lines
581 B
Plaintext
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;-------------------------------
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; #JMPBBFE
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; boot0 jumps to nibble check at
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; ($BBFE) instead of ($08FD)
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; e.g. Mind Over Matter
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;-------------------------------
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_jmpbbfe
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lda gIsBoot0 ; if DOS 3.3 boot0 loader
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bne jmpbbfe_exit
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lda #$00
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ldx #$4A
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ldy #$03
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jsr compare ; and T00,S00,$4A ==
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!byte $6C,$FE,$BB
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bcs jmpbbfe_exit
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lda #$00
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ldx #$4B
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ldy #$02
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jsr modify ; then set T00,S00,$4B =
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!byte $FD,08
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jmpbbfe_exit
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