Tuesday October 08 1996 14:57, azaparov@CYBERCOM.NET wrote to Alex Torres: a> a> Hello, a> I was trying to use PORTA<4> as output pin but did not have a> any luck. Even if I use something like that: a> BSF PORTA,4 a> LOOP: GOTO LOOP Are You set it's bit in TRISA register before ? a> PS. All PORTA pins configured as output. You are sure ? And next: PA4 have an open collector output! Are you use pull-up resistor (~10k) from PA4 to Vdd ? Best Wishes, Alex Torres. Kharkov, Ukraine, exUSSR. E-Mail To : altor@cook.kharkov.ua via InterNet or 2:461/28 via FidoNet --- GoldED 2.50.A0531+ * Origin: Future Hardware, (0572)32-31-62 (2:461/28)