Search found 44 matches

by YuT666
Fri Feb 17, 2017 10:38 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

This challenge isn't that funny ... Thanks for your help, but i'll don't try more. It only makes me angry. Angry as hell. The Oric 1 works, so who cares ... i don't have a cumulus (seems to be sold out and i sent godzil 2 pms without an answer .. strange, 'cause i asked in a very polite way - but so...
by YuT666
Fri Feb 17, 2017 8:56 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Well, i'm not very familiar with measuring those stuff. I would say, that i find this really quite dreadful. So i've to measure all of these adresse and data lines ... but i don't know, what should be good results. And RAMs A0 - A7 with CPUs A0 - A7 ... and Data in & Data out (CPU). Sorry, but that'...
by YuT666
Fri Feb 17, 2017 1:24 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Thanks Steve ...

So i want to check the RAMs again (each) ... what should i measure here exactly?

One more question: NMI pin 6 (6502) goes directly to?
by YuT666
Thu Feb 16, 2017 10:41 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

So ... i socketed a new via and this crap still has the same issue ... after that i fu**ed up the new one, 'cause i pulled him out in an angry way ... my fault. Well, i replaced the cpu, the 6522 & the capacitors. What remains? The rams are all only warm and i get similar results when i measured them.
by YuT666
Thu Feb 16, 2017 8:33 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

I think, replacing the via would be a possibility. If there's still the same prob after the replacement ... it turns out to be more difficult.
by YuT666
Thu Feb 16, 2017 5:30 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Thanks, i know all these repair pages. I replaced the C8 & C21 capacitors with new ones and piggy backed all rams ... still the same issue. None of the rams is getting hot. Maybe i should desolder the via 6522 ... if there is a chance, that this wanker will cause the error. And what about IC8, IC20 ...
by YuT666
Thu Feb 16, 2017 11:55 am
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Yes, i did the same checks with nearly the same results. But the Atmos shows an other error pattern (as shown in the first post).

I received a 6522 VIA yesterday, but i don't want to desolder the old one.
by YuT666
Tue Feb 14, 2017 4:18 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Yes, i tried all 8 RAMs ... no change.

Could someone please show me a pic from the bottom side of an issue 4 board? I only have one modification there.

Maybe i should put the V1.1 basic rom into the issue 3 and put the good board in the atmos case, so i have time to repair the issue 4.
by YuT666
Tue Feb 14, 2017 10:54 am
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Atmos:

I desoldered the old cpu and put a socket in. Tried three different cpus and the Atmos still has the same issue (the pattern i showed in the first post). I checked the socket again and again, but that changed nothing. All cpus worked with the Oric 1, so there must be an other problem. Crap.
by YuT666
Mon Feb 13, 2017 10:36 pm
Forum: Hardware hacks and extensions
Topic: Microdisc controller + Amplibus, do you want another batch?
Replies: 71
Views: 21212

Re: Microdisc controller + Amplibus, do you want another bat

Well, if an other member bails out, i would take a controller. Thanks.
by YuT666
Mon Feb 13, 2017 9:01 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Well, i would take some ... :wink:

And now i should go for a cumulus ... but it's hard get one.
by YuT666
Mon Feb 13, 2017 7:53 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Yes, this could be the problem ... the seller did the same failure with both Orics. I think i'll make a cover for the expansion port too. So i think tomorrow it's time for the Atmos.
by YuT666
Mon Feb 13, 2017 5:10 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Thanks ... it is a little bit strange. The cpu was the first component i replaced ... and the Oric is working. It might have been the RAMs or the 6522 or the ULA or or or ...
by YuT666
Mon Feb 13, 2017 4:42 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

Ok, bought some UM6502 in Ireland ... i desoldered the old cpu of the Oric 1 and soldered a socket (my first 40 pin socket so far) ... put the first cpu in ... Oric1 - 1.jpg ... AND ... Oric1 - 2.jpg Tried some keys and they works so far. I'll test the Oric 1 with a test ROM, so i hope, that the cpu...
by YuT666
Wed Feb 08, 2017 7:40 am
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 9175

Re: Oric 1 and Atmos - repair help needed

I bought some sockets and 6502 MOS, so i'll desolder the old cpus. After that we could ascertain, if the 6502 caused the errors. Thanks Chema.