mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2025-02-20 13:29:04 +00:00
9b12b6fd9b
- getting ready for major changes for 0.6.0. - be sure to download the 0.5.0 release to ensure proper functionality, as these rountines will not work together in the SRC or BIN folder during the transition - Beginning to significantly alter documentation
46 lines
1006 B
NASM
46 lines
1006 B
NASM
]S1LEN EQU VARTAB+1
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]S2LEN EQU VARTAB+3
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]INDEX EQU WPAR3
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]STR2 EQU WPAR2
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]STR1 EQU WPAR1
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STRCAT
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LDY #0
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LDA (]STR1),Y
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STA ]S1LEN
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LDA (]STR2),Y
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STA ]S2LEN
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LDA ]S2LEN
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CLC
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ADC ]S1LEN
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STA RETLEN
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BCC :DOCAT
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LDA #255
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STA RETLEN
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:DOCAT
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LDY #0
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:CAT1
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INY
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LDA (]STR1),Y
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STA RETLEN,Y
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CPY ]S1LEN
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BNE :CAT1
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TYA
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CLC
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ADC #<RETLEN
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STA ]INDEX
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LDA #0
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ADC #>RETLEN+1
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STA ]INDEX+1
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CLC
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LDY #0
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:CAT2
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INY
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LDA (]STR2),Y
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STA (]INDEX),Y
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CPY RETLEN
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BEQ :EXIT
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BNE :CAT2
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:EXIT
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LDA RETLEN
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RTS
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