/* run6502 Header File */

//Platform Specific Constants
#define DELKEY $08 //Delete/Backspace Key
#define ESCKEY $18 //Escape/Stop Key
#define RTNKEY $0A //Return/Enter Key
#define SYSBFL 128 //System Buffer Length

const char delnam; //Delete/Backspace Key Name
const char escnam; //Escape/Stop Key Name
const char rtnnam; //Return/Enter Key Name

//Library Pointer Variables
zeropage int srcptr, dstptr, bfrptr, blkptr;
char bfrlo,bfrhi; //Buffer Pointer for Library Functions
char stklo,stkhi; //Stack Pointer

//Library Variables
int blkbgn, blkend;
char blklen;         //Block Segment Length
char stkslo, stkshi; //Stack Start Address
char stkelo, stkehi; //Stsck End Address
char random, rdseed; //Pseudo-Random Number Generation
char temp0, temp1, temp2, temp3; //Temporary Storage
char sysbfr[], sysbfp; //System String Buffer and Position

//Memory Mapped I/O
char putcon;  //Write Character to Console
char getcon;  //Read Character from Console

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

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