typedef		unsigned char		UBYTE;
typedef  	char					BYTE;
typedef		unsigned int		UWORD;
typedef		int					WORD;





#define 	EXIST						0x00			// used as a parameter to access()
#define  MAX_FILENAME 			13

#define  TRUE						1
#define  FALSE						0
#define  MAX_INSTRUCTIONS		150
#define 	MAX_LINE					81
#define	OK							0
#define	ERROR						  99
#define  LINE_IS_COMMENT		1
#define	LINE_IS_NOT_COMMENT	0
#define	SPACE						' '
#define  COMMENT_CHAR			';'			// used for comments in asm source
#define  MAX_OPCODES				16
#define  MAX_PSEUDOS				5


#define  COMMA						','
#define	R0							'0'
#define	R1							'1'
#define	R2							'2'
#define	R3							'3'

#define	ILLEGAL_REGISTER		100
#define	ILLEGAL_OPCODE			101
#define  ILLEGAL_INSTRUCTION  99

#define	IMMEDIATE_MODE			'#'

#define	MODE0						0				// direct addressing
#define	MODE1						1				// immediate addressing
#define	MODE2						2				// register addressing

#define	NEWLINE					'\n'
#define	TAB						'\t'

#define  SYMBOL_TERM				':'

#define  ASCII_TO_DEC			48				// subtract this from a character 0-9 to get it's decimal value

#define  LOC_CTR_START			0				// the location counter starts here
#define  HALT						99				// symbolizes end of program area, beginning of data
#define  SYMBOL_FOUND			1				// indicates a symbol (label :) was found


#define  ENDOFCODE				0xFF		// used to symbolize the end of the instruction table or end of symbol table

#define  MEMORY_SIZE				(MAX_INSTRUCTIONS + 100)	// amount of memory used for Associative memory

#define  OPCODE_MASK				0xF0
#define  MODE_MASK				0x0C
#define  REG_MASK					0x03