;The Cerebot board has 8 ports named as JA, JB, JC, ..., and JH. It also has 4 LEDs named as LD1, LD2, LD3, and LD4.
;This program reads JA.4 to JA.7 and writes to User LEDs (LD1 to LD4)
;Connect DIP switches to JA.
;It is in AVR Assembly Language for AVR Studio IDE. Make the hex file using AVR Studio.
;See www.microdigitaled.com and www.digilentinc.com for more information

.INCLUDE "M64DEF.INC"

	LDI	R20, 0x00
	OUT	DDRA, R20	;JA as input
	LDI	R20, 0xF0
	OUT	DDRE, R20	;User LEDs as output

	OUT	PORTA, R20	;make pull-up resistors active

	
L1:	IN	R20, PINA	;R20 = JA
	ANDI R20, 0xF0	;R20 = R20 & 0xF0 (just the high nibble)
	OUT	PORTE, R20	;User LEDs = R20
	RJMP	L1		;go to L1