interpreter.c


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/*	
 *	interpreter.c WILL BE a tool which can be used to interpret 6502 machine code inline.
 *	Machine code is expected as hexadecimal of length 2 or 6, depending on the instruction.
 *	There are a few special characters which print debug information
		Q - Quit
		P - Processor status dump
		M - Dump a page of memory
 */

#include"include.h"
#include"debug.h"

int main(){
	char c;
	unsigned char a, b;
	while(1){
		c = getchar();

		//	Exit condition
		if ( (c == 'Q') || (c == 'q') || (c == EOF) ) break;

		if (dCharToNum(c) == -1){
			//	Debug print conditions
			switch(c){
				//	Print debug information
				case 'P': case 'p':
					dStatusDump();
					break;
				//	Dump memory page
				case 'M': case 'm':
					dPageDump();
					break;
				case ' ':
					break;
			}
		}else{
			//	Run Instruction
			byte inst = dCharToNum(c) << 4;
			inst += dCharToNum(getch());
			address pass = 0;
			int temp = fAddressGetLength(getITAddressing(inst));
			temp *= 2;
			c = getch();
			for(int i = 0; i < temp; i++)
				if (c != ' ' && c != EOF){
					pass <<= 4;
					pass += c;
					c = getch();
				}else{
					break;
				}
			}
			current_instruction = IT[inst];
			callIT(current_instruction, pass);
		}
	}
	return 0;
}