mirror of
https://github.com/a2-4am/passport.git
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69 lines
1.9 KiB
Plaintext
Executable File
69 lines
1.9 KiB
Plaintext
Executable File
;-------------------------------
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; #DISKVOL
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; non-standard disk volume prevents
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; disk from loading its own files
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; or even its own DOS
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;-------------------------------
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!zone {
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; gTrack = 0
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; Caller found DOS 3.3 RWTS
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lda #$01
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ldx #$EE
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jsr compare1 ; and T00,S01,$EE ==
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!byte $FB
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bcs .exit
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ldx #$FB
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ldy #$04
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jsr compare ; and T00,S01,$FB ==
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!byte $00,$01,$EF,$D8
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bcs .exit
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lda gForceDiskVol
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beq .yes ; passport-test-suite/Might and Magic.woz [Z=1] matches
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lda gIsPanglosDOS
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ora gCapturedDiskVolumeNumber
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bne +
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lda gDiskVolumeNumber
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cmp #$FE
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bne .yes
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+
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ldx #$EB
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jsr compare1 ; and T00,S01,$EB !=
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!byte $FE
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bcc .exit
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jsr compare1 ; and T00,S01,$EB !=
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!byte $00
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bcc .exit
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.yes
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lda #$08
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ldx #$10
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ldy #$05
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jsr compare ; and T00,S08,$10 ==
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!byte $A0,$03 ; LDY #$03
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!byte $B1,$48 ; LDA ($48),Y
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!byte $48 ; PHA
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bcc .veryyes ; passport-test-suite/The Incredible Laboratory.woz [C=0] matches
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ldx #$16 ; or T00,S08,$16 == the same thing
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; (variation used by PanglosDOS)
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jsr compare ; preserves A/X/Y
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!byte $A0,$03
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!byte $B1,$48
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!byte $48
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bcs .exit
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.veryyes
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jsr PrintByID ; preserves registers
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!byte s_diskvol
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lda #$08
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inx
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inx ; now $12 or $18 (depending on which compare matched)
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jsr modify2 ; then set T00,S08,$12/18 =
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!byte $A9,$00 ; LDA #$00
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.exit
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}
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