#define	HLT			(0x00 << 4)
#define	LOD			(0x01 << 4)
#define	STO			(0x02 << 4)
#define	ADD			(0x03 << 4)
#define	MUL			(0x04 << 4)  // user defined
#define	DIV			(0x05 << 4)	// user defined
#define	LSP			(0x06 << 4)
#define  CLR			(0x07 << 4)
#define	COM			(0x08 << 4)
#define	JZE			(0x09 << 4)
#define	JNEG			(0x0A << 4)
#define	JMP			(0x0B << 4)
#define	OUT			(0x0C << 4)
#define	CALL			(0x0D << 4)
#define	RET			(0x0E << 4)
#define	NOP			(0x0F << 4)


// Pseudo Ops

#ifdef ORIGINAL_PSEUDO

#define	ORG			1
#define  EQU			2
#define  DC				3
#define	DS				4
#define	END			5

#endif


#define	ORG			0x10
#define  EQU			0x11
#define  DC				0x12
#define	DS				0x13
#define	END			0x14




#define  ONE_BYTE			1		// 1 byte instruction length
#define  MODE0_LENGTH	3		// 3 byte instruction length
#define  MODE1_LENGTH	2		// 2 byte instruction length
#define  NO_MODE_LENGTH 3 		// used for OUT instruction