From: krugman AT nospam DOT demon DOT co DOT uk (Kevin) Newsgroups: comp.os.msdos.djgpp Subject: Re: LCD Programming Date: Sat, 20 Mar 1999 00:02:40 GMT Message-ID: <36f3e369.12599809@158.152.254.68> References: <36F2BB66 DOT E23B851B AT numerica DOT it> NNTP-Posting-Host: reality-bytes.demon.co.uk X-NNTP-Posting-Host: reality-bytes.demon.co.uk:212.228.30.60 X-Trace: news.demon.co.uk 921888139 nnrp-04:20975 NO-IDENT reality-bytes.demon.co.uk:212.228.30.60 X-Complaints-To: abuse AT demon DOT net X-Newsreader: Forte Agent 1.5/32.451 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 32 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Hi Guess what I was doing this very day at work, I was writing a program that used the parallel port to drive a display assembly consisting of 3 * 6 digit 7 segment LCDs and driven by four Hitachi HD44100 chips. the interface on these chips is alledgedly the same as the HD66100 chips, but the 66100's are 80 registers instead of the 40 in the 44100's I've used the paralel port for a few other thigs and its realy easy, It's a good idea to get a separate plug in ISA card with a LPT port on it, cos then you're less likely to damage your mother board if something goes disastrousley wrong. Once I had sorted out which segment was wired to which shift register(they were all done seemingly at random, and this took half a day to figure). It was realy easy. If you like, I'll post the code and the LPT connections I used, but I'm not back at work till Monday, and I don't have the code here at home. Kevin. If you wish to Email or ICQ me, use kevin AT reality-bytes DOT demon DOT co DOT uk or 25646989 Can you tell what it is yet?