Something

enum AddressMode { Immediate, Direct, Indexed, Extended, Inherent };

struct OpCodes {
	const char *mnuemonic;
	unsigned char opcode;
	unsigned char cycles;
	unsigned char numbytes;
	enum AddressMode mode;
} opcodes[] =  {"ABX",  0x3A, 3, 1, Inherent,
		"ADCA", 0x89, 2, 2, Immediate, "ADCA", 0x99, 4, 2, Direct, "ADCA", 0xA9, 4, 2, Indexed, "ADCA", 0xB9, 5, 3, Extended,
		"ADCB", 0xC9, 2, 2, Immediate, "ADCB", 0xD9, 4, 2, Direct, "ADCB", 0xE9, 4, 2, Indexed, "ADCB", 0xF9, 5, 3, Extended };