The screen has multiple chips that control chunks of the screen. Each chip has its own chip select line labeled CS## on schematic. Seems like those chip select signals are not all getting through.
Sent from my Windows 10 phone From: Chris Fezzler Sent: Wednesday, July 22, 2020 8:02 AM To: m...@bitchin100.com Subject: Re: [M100] Listserv Search I'm trying to troubleshoot what components on the circuit board process keystrokes and send them to the screen. The screen and keyboard on my Model 100 are in perfect working order. But only the top four are processing correctly. The bottom four are displaying gibberish. But if I type commands in BASIC, they work. So again, not the keyboard or screen but components that process the bottom half. A hard rest will present a perfect menu screen. But upon entering an app, the bottom four lines are not getting proper signal. Sorry, I'm not an electronics or computer engineer. Just a hobbyist with a soldering iron and a willingness to learn. Plan to look at Technical Reference Manual to see if I can troubleshoot. On Wednesday, July 22, 2020, 01:15:25 AM EDT, John R. Hogerhuis <jho...@pobox.com> wrote: On Tue, Jul 21, 2020 at 5:08 PM Chris Fezzler <fezz...@yahoo.com> wrote: Is there a way to search old Listserv messages so I can research before embarrass...err...I mean ask a dumb question. Seriously, would like to research. How old are we talking? Gmane was our archive until it went down for a long time. Then it was back up recently but only accessible through nntp readers. Not sure the status of that. Our GNU Mailman list itself has an archive which goes back to 2011 when I took over running the list. http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/ Or just ask. We Are The Archive. -- John.