Matrix _16f877 need help, please

[Archangel]

Hi MINHLE,
try this

ADCON0 = 0
ADCON1 = 7

A VAR BYTE

PORTB = 0 ; SET PORTB AS OUTPUT
PORTC = 0 ; set port c as output
trisB = %00000000 'all ports B as outputs
TrisC = %00000000 'all ports C as outputs

PORTC.1 = 0 ; set port C1 to low wich enables leds ground pin
CCP1CON = 0 ' turn off CCP Module which affects portC
pause 300

LOOP:
FOR A = 0 TO 8 'loop to repeat
PORTB.0 = 1 'set port B0 to high, turn on led
PAUSE 500
PORTB.0 = 0 ; set port B0 to low, turn off led
PAUSE 300
NEXT A

GOTO LOOP ' Flash forever
END

The only difference is I set Tris registers and disabled Capture Compare Module. and turned off A/D converter. Now how have you set your config fuses? You have specified 20 mhz and this will not work with the default config statement found in the C:\PBP\16f877.inc file.