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37 lines
423 B
ArmAsm
37 lines
423 B
ArmAsm
;
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; Maciej 'YTM/Elysium' Witkowiak
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;
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; 25.12.99
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.export DB_get2lines
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.importzp ptr3,ptr4
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.import popax
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.code
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DB_get2lines:
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sta ptr4 ; fetch line 2
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stx ptr4+1
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jsr popax
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sta ptr3 ; fetch line 1
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stx ptr3+1
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ldx #ptr3
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jsr checknull
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ldx #ptr4
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jmp checknull
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checknull:
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lda $0,x
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ora $1,x
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bne cn_end
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lda #<nullstring
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sta $0,x
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lda #>nullstring
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sta $1,x
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cn_end: rts
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.rodata
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nullstring:
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.byte 0
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