mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-12-12 01:30:00 +00:00
92 lines
2.7 KiB
Plaintext
92 lines
2.7 KiB
Plaintext
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*``````````````````````````````*
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* SINPUT :: SPECIAL INPUT *
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* *
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* INPUTS A STRING OF TEXT VIA *
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* MONITOR HOOKS. MAC 255 CHARS *
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*- -*
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* CLOBBERS: *
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* *
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* FLAGS: ???----- REG: AXYM *
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*- -*
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* CYCLES: ??? *
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* SIZE: *
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*- -*
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* USAGE: *
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* LDA #>(ADDRESS) *
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* PHA *
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* LDA #<(ADDRESS) *
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* PHA *
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* JSR SINPUT *
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*- -*
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* ENTRY *
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* *
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* TOP OF STACK *
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* *
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* LOW BYTE OF RETURN ADDRESS *
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* HI BYTE OF RETURN ADDRESS *
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* LOW BYTE OF INPUT ADDRESS *
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* HI BYTE OF INPUT ADDRESS *
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*- -*
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* EXIT *
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* *
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* TOP OF STACK *
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* *
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* LOW BYTE OF RETURN ADDRESS *
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* HI BYTE OF RETURN ADDRESS *
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* *
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* A = LOW BYTE OF ADDRESS *
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* X = LENGTH OF STRING *
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* Y = LENGTH OF STRING *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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SINPUT
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*
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** SAVE RETURN ADDRESS
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*
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PLA
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STA :RETADR
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PLA
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STA :RETADR+1
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*
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** GET PARAMETERS
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*
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PLA
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STA ADDR1 ; STORE IN ZERO
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PLA ; PAGE
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STA ADDR1+1
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*
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LDX #$00
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JSR GETLN
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STX :STRLEN ; STORE STR LENGTH
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CPX #0
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BEQ :EXIT
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*
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:INP_CLR
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LDY #0
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LDA :STRLEN ; LENGTH OF STRING
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STA (ADDR1),Y ; PUT LENGTH AT START OF LOC
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:LOOP
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LDA KEYBUFF,Y ; PUT STR INTO NEW LOC
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INY
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STA (ADDR1),Y
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CPY :STRLEN ; IF Y < STR LENGTH
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BNE :LOOP ; LOOP; ELSE, CONTINUE
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*
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:EXIT
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*
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** RESTORE RETURN ADDRESS
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*
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LDA :RETADR+1
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PHA
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LDA :RETADR
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PHA
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*
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RTS
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*
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** DATA
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*
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:STRLEN DS 1
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:RETADR DS 2
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*
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