Search found 41 matches

by Vyper68
Tue Apr 23, 2019 12:07 pm
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Re: Oric-1 Repair

I think I will have to write this one off as a bad job, the ULA is toast and so is the ROM so I am not going to spend more time on this one.
by Vyper68
Mon Apr 22, 2019 9:36 am
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Re: Oric-1 Repair

Thanks for the help mikeb you are a star! That will help greatly. It does seem like the clock is there now but I have a horrible feeling the ULA and main IC's have been damaged by whatever event occured. Still it won't put me off, I have a AY chip, 6502, 6522 and RAM, I can burn a new ROM and I will...
by Vyper68
Sun Apr 21, 2019 8:19 am
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Re: Oric-1 Repair

I had some more duff logic chips .... I have not got it working yet sadly as there now seems to be no Clock signal from the 12Mhz crystal or IC21 is stuffed as well. I am starting to think that someone plugged a PSU socket in the modulator or something equally as odd. OK, it's quite unlikely that a...
by Vyper68
Sat Apr 13, 2019 7:31 am
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Re: Oric-1 Repair

I had some more duff logic chips on the UHF modulator circuit the other LS74 and LS04. I have not got it working yet sadly as there now seems to be no Clock signal from the 12Mhz crystal or IC21 is stuffed as well. I am starting to think that someone plugged a PSU socket in the modulator or somethin...
by Vyper68
Tue Apr 09, 2019 6:04 pm
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Re: Oric-1 Repair

Thanks for the replies guys, helpful advice. Yeah, I have no info on the Oric's history other than it was a non-runner and bought or donated to my friend as such. So what happened I do not know. It was never opened since it was sold as the Seal was intact and untampered until I lifted it off. I was ...
by Vyper68
Tue Apr 09, 2019 10:00 am
Forum: Technical questions
Topic: Oric-1 Repair
Replies: 13
Views: 432

Oric-1 Repair

Hi I have been repairing an Oric-1 for a friend this week and have made some progress. I had to fit a new 7905 and once I did I was getting a reading of 3.5V so something was pulling it low. I went for the RAM at first but rather than cut the traces on the 0V Rail I desoldered them one at a time ( l...
by Vyper68
Thu Aug 09, 2018 3:19 pm
Forum: Technical questions
Topic: Oric Atmos Boot-Up Query
Replies: 10
Views: 3099

Re: Oric Atmos Boot-Up Query

I have 8 Atmos, an Oric-1 and a Telestrat - and they all behave differently depending on the power supply being used. I've noticed that the lower Amps, the messier the screen on boot up - maybe this is a clue? I am using a decent 9V 1A PSU what are you using for your Oric's & Telestrat ( nice :D )
by Vyper68
Thu Aug 09, 2018 4:34 am
Forum: Mags and books
Topic: Oric Atmos Manual Wanted
Replies: 8
Views: 1875

Re: Oric Atmos Manual Wanted

Steve M wrote:
Thu Aug 02, 2018 1:28 pm
I should be able to find one for you.
Thanks Mate you're a good'un :D
by Vyper68
Sat Jul 28, 2018 4:33 pm
Forum: Technical questions
Topic: Oric Atmos Boot-Up Query
Replies: 10
Views: 3099

Re: Oric Atmos Boot-Up Query

iss wrote:
Sat Jul 28, 2018 10:12 am
You're not alone! :)
And I think I have one more Atmos with the same issue.
I don't know why this really happens, but it's interesting for investigation.

I get the same character as you most of the time - this is very odd.
by Vyper68
Sat Jul 28, 2018 4:31 pm
Forum: Technical questions
Topic: Oric Atmos Boot-Up Query
Replies: 10
Views: 3099

Re: Oric Atmos Boot-Up Query

Well my Atmos has 8 4164 stylye RAM Chips.

Image
by Vyper68
Thu Jul 26, 2018 12:50 pm
Forum: Technical questions
Topic: Oric Atmos Boot-Up Query
Replies: 10
Views: 3099

Re: Oric Atmos Boot-Up Query

This one has a multi-coloured block random pattern a bit like the ZX Spectrum then it goes to a page of black & white vertical lines and then the Oric welcome screen ( plus "{" 90% of the time ). It does seem to take a bit longer to boot than my old Atmos ( unless my mind is playing tricks on me ). ...
by Vyper68
Thu Jul 26, 2018 10:23 am
Forum: Technical questions
Topic: Oric Atmos Boot-Up Query
Replies: 10
Views: 3099

Oric Atmos Boot-Up Query

Hi I have a new Atmos i have just bought and overall it seems in good condition. It needed some TLC though on closer inspection. The PSU Socket was very loose and i needed to replace it. Some of the keys were non-working or very intermittent. That turned out to be one key had contacts that were not ...
by Vyper68
Wed Jul 25, 2018 6:52 pm
Forum: Mags and books
Topic: Oric Atmos Manual Wanted
Replies: 8
Views: 1875

Re: Oric Atmos Manual Wanted

I missed that one but thanks for the insight i will keep that in mind for next time. :D
by Vyper68
Wed Jul 25, 2018 7:55 am
Forum: Mags and books
Topic: Oric Atmos Manual Wanted
Replies: 8
Views: 1875

Re: Oric Atmos Manual Wanted

That would indeed be a "printed" copy of the manual. I was hoping somone would have a real circa 1980's manual spare, i will just keep using the PDF version for now until one turns up on eBay. :)
by Vyper68
Tue Jul 24, 2018 12:04 pm
Forum: Mags and books
Topic: Oric Atmos Manual Wanted
Replies: 8
Views: 1875

Re: Oric Atmos Manual Wanted

Thanks DBug, I was hoping to get a real paperback one rather than digital. I have it on my Kindle Paperwhite but it's not the same. :D