#include P18F458.inc
RAM_ADDR 	EQU 40H
COUNTREG 	EQU 0x20		
CNTVAL 	EQU 4			
CNTVAL1 	EQU 5			
 	GLOBAL TEST_CHKSUM
	PGM CODE
TEST_CHKSUM
	MOVLW	CNTVAL1		
	MOVWF	COUNTREG		
	CLRF	TRISB
	LFSR	0,0x40		
	CLRF	WREG
C3	ADDWF	POSTINC0,W		
	DECF	COUNTREG,F		
	BNZ 	C3			
	XORLW	0x0			
	BZ	G_1			
	MOVLW	'B'
	MOVWF	PORTB			
	RETURN
G_1	MOVLW	'G'
	MOVWF	PORTB			
	RETURN
	END