mirror of https://github.com/a2-4am/passport.git
25 lines
659 B
Plaintext
Executable File
25 lines
659 B
Plaintext
Executable File
;-------------------------------
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; #JMPB4BBHI
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; boot2 jumps to $B4BB for a
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; nibble check
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; e.g. Snooper Troops 2
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;-------------------------------
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_jmpb4bbhi
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lda gIsBoot1 ; if DOS 3.3 bootloader
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bne jmpb4bbhi_exit
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lda #$0C
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sta gDisplayBytes
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ldx #$84
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ldy #$03
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jsr compare ; and T00,S0C,$84 ==
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!byte $4C,$BB,$B4
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bcs jmpb4bbhi_exit
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lda #s_jmpb4bb
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jsr PrintByID
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lda #$0C
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ldx #$84
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ldy #$03
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jsr modify ; then set T00,S0C,$84 =
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!byte $AD,$E9,$B7
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jmpb4bbhi_exit
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