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27 lines
727 B
Plaintext
27 lines
727 B
Plaintext
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; py65mon program initialization code for c02 programs
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;System Specific ASCII Key Mappings
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DELKEY EQU $7F ;Delete/Backspace Key (Delete)
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ESCKEY EQU $1B ;Escape/Stop Key (Escape)
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RTNKEY EQU $0D ;Return/Enter Key (Carriage Return)
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;Memory Mapped I/O
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PUTC EQU $F001 ;Write Character to Console
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GETC EQU $F004 ;Read Character from Console
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ORG $0200 ;Start Directly Above Stack
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START: JMP MAIN ;Execute Program
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;Wait for Character from Console
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RDKEY: LDA GETC ;Read Character from Console
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BEQ RDKEY ; Loop if None Received
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RTS
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;Print Character to Console
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PRCHR: STA PUTC ;Write Character to Console
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RTS
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EXIT: BRK ;Return to Monitor
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