On Thu, Jan 12, 2012 at 8:36 AM, Dilwyn Jones <dil...@evans1511.fsnet.co.uk> wrote: > From: "Rich Mellor" <r...@rwapservices.co.uk> > Sent: Thursday, January 12, 2012 12:27 AM > To: <ql-us...@q-v-d.com> > Subject: [Ql-Users] QXT-640 Revived > >> I have managed to revive a Sandy QXT-640 computer - and have listed it on >> sellmyretro.com >> >> Just for the fun of it, I have included a note of my trials and >> tribulations in getting the computer back up and running. >> Don't laugh too much !! >> >> >> <url:http://www.sellmyretro.com/offer/details/RARE_Sandy_QXT-640_%28Sinclair_QL%29_Home_Computer-2082> >> > Wonder if Dave P. would remember the info about these as he used to work at > Sandy? > > Dilwyn Jones > _______________________________________________ > QL-Users Mailing List > http://www.q-v-d.demon.co.uk/smsqe.htm
The only aspect of the QXT-640 I dealt with was that all the cards had the 7805 regulators removed and links inserted as the boards were given a clean 5v supply. It was a trap and bane of my existence that I had to carefully check any card I worked on to see if it had been adapted for a QXT-640 - inserting it in a regular QL would instantly destroy it. I recall the order of cards was important, but not what order, or why it was important - though anyone who has ever designed a backplane knows the importance of buffering and signal integrity ;) *winks* Dave _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
