; Constants
;-----------------------------------------------------------------------
; PIO constants and definitions
; I/O ports
		DEFINE C_PIO_PortA_DATA	#FC
		DEFINE C_PIO_PortA_CMD	#FD
		DEFINE C_PIO_PortB_DATA	#FE
		DEFINE C_PIO_PortB_CMD	#FF
; Port direction commands
		DEFINE C_PIO_Output	#0F
		DEFINE C_PIO_Input	#4F
		DEFINE C_PIO_Bi		#8F
		DEFINE C_PIO_Control	%11001111
; Misc. port settings
		DEFINE C_PIO_Keypad	#0F	; B7-B4 = output, B3-B0 input
		DEFINE C_PIO_KeypadMask	#F0	; 0 = monitor this bit
		DEFINE C_PIO_KeypadScan	#F0	; Scan using B7-B4
		DEFINE C_PIO_Interrupt	%10110111
		DEFINE C_PIO_DisInterrupt	%00000111