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38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
/* VIC 20 with 8k Expansion Header File */
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/* Platform Specific Settings */
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#pragma zeropage $FB $FE //Zero Page Free Space
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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/Stop 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 Variables */
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zeropage int srcptr, dstptr; //Source and Destination Pointer
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zeropage int blkptr, stkptr; //Block and Stack Pointers
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zeropage int tmpptr, usrptr; //Temporary and User Pointer
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int stkbgn, stkend; //Stack Begin and End Address
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int blkbgn, blkend; //Block Begin and End Address
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char blklen, xmbank; //Block Segment Length, Ext Memory Bank
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int xmaddr; //Extended Memory Address
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char random, rdseed; //Pseudo-Random Number and Seed
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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 getchr(); //Wait for character from Console
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char getkey(); //Read ASCII character from Console
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void newlin(); //Advance cursor to beginning of next line
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char polkey(); //Poll Console for character
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void prbyte(); //Print Accumulator as Hexadecimal number
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void prhex(); //Print Low Nybble of Accumulator as Hex Digit
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char putchr(); //Print ASCII character to Console
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char putstr(); //Print ASCII string to Console
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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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