mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-12-12 01:30:00 +00:00
83 lines
2.1 KiB
Plaintext
83 lines
2.1 KiB
Plaintext
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*``````````````````````````````*
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* FPRINT : JUST PRINTS TO COUT *
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*- -*
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* PRINTS A STRING TO A TEXT *
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* FILE THAT IS SPECIFIED IN AN *
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* ASC THAT FOLLOWS THE JSR TO *
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* THE SUBROUTINE. *
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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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* *
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* JSR CMD *
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* ASC "OPEN TEXT1" *
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* HEX 8D00 *
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* JSR CMD *
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* ASC "WRITE TEXT1" *
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* HEX 8D00 *
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* JSR FPRINT *
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* ASC "THIS IS A TEST." *
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* HEX 8D00 *
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* JSR CMD *
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* ASC "CLOSE TEXT1" *
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* HEX 8D00 *
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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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*- -*
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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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* Y = CLOBBERED *
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* X = UNCHANGED *
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* A = CLOBBERED *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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*
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FPRINT
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*
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** GET 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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** NOW SEND STRING TO COUT
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*
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LDY #$01 ; POINT TO NEXT INSTR
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:LP
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LDA (RETADR),Y
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BEQ :DONE
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JSR FCOUT
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INY
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BNE :LP
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:DONE
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CLC ; RESTORE INSTR POINTER
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TYA
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ADC RETADR
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STA RETADR
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LDA RETADR+1
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ADC #$00
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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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