/* run6502 Header File */

/* Platform Specific Settings */
#pragma zeropage $40 $FF //Zero Page Free Space

/* Platform Specific Constants */
#define DELKEY $7F //Delete/Backspace Key
#define ESCKEY $1B //Escape/Stop Key
#define RTNKEY $0D //Return/Enter Key
#define SYSBFL 128 //System Buffer Length

/* Standard Library Variables */
zeropage int srcptr, dstptr;          //Source and Destination Pointer
zeropage int blkptr, stkptr;          //Block and Stack Pointers
zeropage int tmpptr, lstptr, usrptr;  //Temporary and User Pointer
int  stkbgn, stkend;                  //Stack Begin and End Address
int  blkbgn, blkend;                  //Block Begin and End Address
char blklen, xmbank;                  //Block Segment Length, Ext Memory Bank
int  xmaddr;                          //Extended Memory Address
int  intacc, intarg, intovr;          //Integer Accumulator, Argument, Overflow
char random, rdseed;                  //Pseudo-Random Number and Seed
char temp0, temp1, temp2, temp3;      //Temporary Storage
char sysbfr[], sysbfp;                //System String Buffer and Position

/* System Subroutines */
void delchr(); //Delete previous character
char getchr(); //Wait for character from Console
char getkey(); //Read ASCII character from Console
void newlin(); //Advance cursor to beginning of next line
char polkey(); //Poll Console for character
void prbyte(); //Print Accumulator as Hexadecimal number
void prhex();  //Print Low Nybble of Accumulator as Hex Digit
void prword(); //Print Low Nybble of Accumulator as Hex Digit
char putchr(); //Print ASCII character to Console
char putstr(); //Print ASCII string to Console

/* System Labels */
start:  //Start of Code
exit:   //Return to Operating System