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39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
/* Unexpanded VIC 20 Header File */
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/* Platform Specific Constants */
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#define DELKEY $14 //Delete/Backspace Key (DEL)
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#define ESCKEY $03 //Escape/Break Key (STOP)
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#define RTNKEY $0D //Return/Enter Key (RETURN)
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#define SYSBFL 88 //System Buffer Length
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/* Standard Library Pointers */
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zeropage int srcptr, dstptr, bfrptr, blkptr;
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char bfrlo,bfrhi; //Buffer Pointer for Library Functions
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char stklo,stkhi; //Stack Pointer
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/* Standard Library Variables */
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int blkbgn, blkend; //Block Start and End Address
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char blklen; //Block Segment Length
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char stkslo, stkshi; //Stack Start Address
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char stkelo, stkehi; //Stsck End Address
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char random, rdseed; //Pseudo-Random Number Generation
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char temp0, temp1, temp2, temp3; //Temporary Storage
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char sysbfr[], sysbfp; //System String Buffer and Position
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/* System Subroutines */
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void delchr(); //Delete previous character
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char getkey(); //Read ASCII character from Keyboard
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char getpos(); //Get Cursor Position
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char getsiz(); //Get Screen Size
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void newlin(); //Advance cursor to beginning of next line
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char polkey(); //Poll Keyboard for character
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char putchr(); //Print ASCII character to Keyboard
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void prbyte(); //Print Accumulator as Hexadadecimal number
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void prhex(); //Print Low Nybble of Accumulator as Hex Digit
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char getchr(); //Wait for character from Keyboard
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void setpos(); //Set Cursor Position
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//System Labels
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start: //Start of Code
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exit: //Return to Operating System
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