Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!cbatt!ucbvax!ARDEC.ARPA!ekijak From: ekijak@ARDEC.ARPA.UUCP Newsgroups: comp.sys.atari.8bit Subject: Re: [: question on 800 and 850] Message-ID: <8701301559.aa24554@ARDEC-3.ARDEC.ARPA> Date: Fri, 30-Jan-87 15:59:33 EST Article-I.D.: ARDEC-3.8701301559.aa24554 Posted: Fri Jan 30 15:59:33 1987 Date-Received: Sat, 31-Jan-87 08:25:41 EST Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 6 I don't know how to interface the 850 port to the robot, but you could skip the 850 and drive the robot directly (or via an inverter/buffer - SN7406? SN7407?) from the 800's joystick ports. They are driven by (if I remember correctly) 2 6520 PIAs, so ports 0 and 1 provide 8 individually controllable bits of control, and ports 2 and 3 provide 8 more. A total of 16 bits which can individually be set to be either inputs or outputs.