Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 beta 3/9/83; site sdcrdcf.UUCP Path: utzoo!watmath!clyde!floyd!harpo!seismo!hao!hplabs!sdcrdcf!darrelj From: darrelj@sdcrdcf.UUCP (Darrel VanBuer) Newsgroups: net.micro Subject: Re: Smart keyboard for apple IIe Message-ID: <931@sdcrdcf.UUCP> Date: Wed, 21-Mar-84 13:00:08 EST Article-I.D.: sdcrdcf.931 Posted: Wed Mar 21 13:00:08 1984 Date-Received: Fri, 23-Mar-84 21:01:31 EST References:<223@mi-cec.UUCP> Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer) Organization: System Development Corporation, Santa Monica Lines: 16 Assuming the IIe keyboard is similar to the II/II+ keyboard, the interface between the keyboard and processor board is pretty simple (and documented in the Apple II Reference Manual): seven parallel data lines carrying the ASCII character, an edge-triggered strobe line (a short pulse sets the character available latch), and a few lines for power to the keyboard. I.e. all you need is an 8 bit output port on your substitute keyboard (and an 8-bit input port if you want to read the "real" keyboard yourself). -- Darrel J. Van Buer, PhD System Development Corp. 2500 Colorado Ave Santa Monica, CA 90406 (213)820-4111 x5449 ...{allegra,burdvax,cbosgd,hplabs,ihnp4,sdccsu3,trw-unix}!sdcrdcf!darrelj VANBUER@USC-ECL.ARPA