+Nezgar Posted October 6, 2018 Share Posted October 6, 2018 You're sure it's a stock Atari OS ROM in there? Whatever text strings you see would be visible in the OS ROM if they're in there..... Like "System Error" - I also have never seen or heard of this before. Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted October 6, 2018 Share Posted October 6, 2018 (edited) Snap a picture of the inside, dump from the chips, picture of the error on screen etc. I believe your account of what happens. While the error is still on showing move video cable to another TV. The error should still appear on screen. hmm error 9, corrupted stack/unable to put to screen memory... No rainbow for you! Edited October 6, 2018 by _The Doctor__ 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted October 7, 2018 Author Share Posted October 7, 2018 You're sure it's a stock Atari OS ROM in there? Whatever text strings you see would be visible in the OS ROM if they're in there..... Like "System Error" - I also have never seen or heard of this before. I looked at my ROM's and they are my OS 11 chipset. Now I'm going to have to pull them out and see If I can dump them to look for SYSTEM ERROR CODE: David Quote Link to comment Share on other sites More sharing options...
+bob1200xl Posted October 7, 2018 Share Posted October 7, 2018 Never heard of such a thing, but I don't run OS11, either. I would look in the DIAG address space in $D000-$D7FF for some kind of new stuff, This code is never used again once you get thru a cold boot. (you have to move this block down into $5000-$57FF in order to see it - use the DIAG bit in the MMU) The 375 makes the DRAM clocks, by the way. Bob 1 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted October 7, 2018 Share Posted October 7, 2018 (edited) Never heard of such a thing, but I don't run OS11, either. I would look in the DIAG address space in $D000-$D7FF for some kind of new stuff, This code is never used again once you get thru a cold boot. (you have to move this block down into $5000-$57FF in order to see it - use the DIAG bit in the MMU) The 375 makes the DRAM clocks, by the way. Bob which explains corruption and problem in putting to screen memory... makes perfect sense. Edited October 7, 2018 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted October 7, 2018 Share Posted October 7, 2018 (edited) I just did a quick scan through the usual OS 11 ROM you find in all the usual places online. The only English text obvious in the code is the ordinary BOOT ERROR message you get when you have a drive connected but no disk/DOS available to load: Edited October 7, 2018 by DrVenkman Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted October 7, 2018 Share Posted October 7, 2018 No amount of searching stock Atari OS ROMs is going to reveal 'System Error', since it's not there. The string does, however, exist in the SALT cart, funnily enough: http://atariage.com/forums/topic/188797-trying-to-fix-2-broken-800xl-help/?do=findComment&comment=2385950 2 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted October 7, 2018 Share Posted October 7, 2018 That would make sense, if the SALT cart was present... it's easy to forget details when you're writing post mortem of an extensive troubleshooting session like that... 1 Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 8, 2018 Share Posted October 8, 2018 The self test code has visible text but it's mostly as Atari internal screen codes. 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted October 8, 2018 Author Share Posted October 8, 2018 Ok, I guess I'm loosing it. I reinstalled the bad 74LS375 chip and without the SALT cartridge installed all I get is a black screen without any keyboard or sound. When I installed the SALT cart the main screen comes up but the computer locked up tight. The hearts and @ signs are all over the screen and the rolling colors are frozen. I tried turning the machine off and on quickly several times, and I tried turning the computer on for several minutes to let it warm up before turning it off and on. Nothing made any difference. Maybe reseating the bad chip made just enough difference to get by the orange SYSTEM ERROR CODE:? I would have liked to post a picture of that screen because I'll most likely never see it again. Once again I apologize for the confusion... David Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted October 8, 2018 Share Posted October 8, 2018 (edited) no need to apologize, the code was correct for the condition. you would have had to made sure to put all the chips back in that were there before. best of all you have repaired the machine(s) Edited October 8, 2018 by _The Doctor__ 1 Quote Link to comment Share on other sites More sharing options...
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