mirror of https://github.com/a2-4am/passport.git
50 lines
1.6 KiB
Plaintext
Executable File
50 lines
1.6 KiB
Plaintext
Executable File
;-------------------------------
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; #DAVIDBB03
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; David-DOS boot0 calls $BB03
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; for a self-decrypting nibble
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; check which continues to $B7A9
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; on success
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; e.g. Case of the Great Train
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; Robbery, Case of the Missing
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; Chick, Mrs. Wigglesworth's Secret
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; Mystery of the Witch's Shoes
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;-------------------------------
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_davidbb03
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lda #$00
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ldx #$00
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ldy #$38
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jsr compare ; and T00,S00,$00 ==
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!byte 01,$A5,$27,$C9,09,$D0,$17,$A5
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!byte $2B,$4A,$4A,$4A,$4A,$AA,09,$C0
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!byte $85,$3F,$A9,00,$9D,$78,04,$9D
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!byte $F8,04,$A9,$5C,$85,$3E,$AE,$FF
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!byte 08,$30,$15,$BD,$ED,08,$85,$3D
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!byte $CE,$FF,08,$AD,$FE,08,$85,$27
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!byte $CE,$FE,08,$A6,$2B,$6C,$3E,00
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bcs davidbb03_exit
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lda #$00
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ldx #$8B
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ldy #$03
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jsr compare ; and T00,S00,$8B ==
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!byte $20,03,$BB
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bcs davidbb03_exit
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lda #$07
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ldx #$03
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ldy #$25
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jsr compare ; and T00,S07,$03 ==
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!byte $4E,06,$BB,$71,$6E
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!byte $0A,$BB,$40,$27,$6E,$0F,$BB,$DD
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!byte $1B,$BB,$6E,$15,$BB,$DC,$1E,$BB
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!byte $6E,$25,$BB,$72,00,$BB,$B3,00
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!byte $B8,$99,00,$BB,$C8,$A0,$F4,$B0
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bcs davidbb03_exit
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lda #s_jsrbb03
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jsr PrintByID
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lda #$07
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ldx #$03
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ldy #$0B
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jsr modify ; then set T00,S07,$03 =
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!byte $A9,$B5,$48,$A9,$18,$48,$A0,04
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!byte $4C,$A9,$B7
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davidbb03_exit
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