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https://github.com/nathanriggs/AppleIIAsm-Collection.git
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9f35f32f67
- massive overhaul of architecture - first round of optimizations - first draft of the technical manual for the entire library - reorganization of directory structure
40 lines
1.0 KiB
Plaintext
40 lines
1.0 KiB
Plaintext
*``````````````````````````````*
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* PRNSTR (NATHAN RIGGS) *
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* *
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* INPUT: *
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* *
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* .A = ADDRESS LOBYTE *
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* .X = ADDRESS HIBYTE *
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* *
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* OUTPUT: *
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* *
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* PRINTS STRING TO SCREEN. *
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* *
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* DESTROY: AXYNVBDIZCMS *
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* ^^^^^ ^^^ *
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* *
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* CYCLES: 28+ *
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* SIZE: 22 BYTES *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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]STRLEN EQU VARTAB ; 1 BYTE
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*
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PRNSTR
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*
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STA ADDR1
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STX ADDR1+1
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*
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LDY #0
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LDA (ADDR1),Y ; GET STRING LENGTH
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STA ]STRLEN
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:LP
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INY
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LDA (ADDR1),Y ; GET CHARACTER
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JSR COUT1 ; PRINT CHARACTER TO SCREEN
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CPY ]STRLEN ; IF Y < LENGTH
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BNE :LP
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; LOOP; ELSE
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LDY #0
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LDA (ADDR1),Y
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RTS
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