39 lines
878 B
ArmAsm
39 lines
878 B
ArmAsm
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; 2002-11-16, Ullrich von Bassewitz
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; 2016-04-28, Greg King
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;
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; void logscr(const void *msg, unsigned len);
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.export _logscr
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.import BSOUT
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.import popax
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.importzp ptr1, ptr2
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;--------------------------------------------------------------------------
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.proc _logscr
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eor #$FF
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sta ptr2
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txa
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eor #$FF
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sta ptr2+1 ; remember -count-1
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jsr popax ; get buf
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sta ptr1
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stx ptr1+1
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L1: inc ptr2 ; count the char that will be printed
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bne L2
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inc ptr2+1
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beq L9
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L2: ldy #$00
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lda (ptr1),y
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jsr BSOUT
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inc ptr1
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bne L1
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inc ptr1+1
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bne L1 ; branch always
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L9: rts
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.endproc
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