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25 lines
758 B
Plaintext
25 lines
758 B
Plaintext
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;-------------------------------
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; #JMPB720
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; RWTS swapper forcibly reinstalls
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; a jump to $B720 instead of writing
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; third data prologue
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; e.g. Analogies Tutorial, Verb Viper
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;-------------------------------
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_jmpb720
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lda gIsRWTS ; if DOS 3.3-shaped RWTS
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bne jmpb720_exit
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lda #$0B
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ldx #$08
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ldy #$18
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jsr compare ; and T00,S0B,$08 ==
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!byte $4C,$20,$B7,$4C,$0E,$A9,$A2,02
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!byte $BD,$0B,$B7,$9D,$5E,$B8,$BD,08
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!byte $B7,$9D,$F6,$B8,$CA,$10,$F1,$60
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bcs jmpb720_exit
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lda #$0B
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ldx #$08
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ldy #$06
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jsr modify ; then set T00,S0B,$08 =
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!byte $BD,$8C,$C0,$20,$B8,$B8
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jmpb720_exit
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