Search found 371 matches

by Steve M
Wed Jun 28, 2017 10:21 pm
Forum: General Discussion
Topic: Sedoric warning "DOS is altered!"
Replies: 7
Views: 79

Re: Sedoric warning "DOS is altered!"

Is there a version that isn't Atmos compatible ?

The one on this disk image works.
IJKBEST2.DSK
(569 KiB) Not downloaded yet
by Steve M
Wed Jun 28, 2017 7:37 pm
Forum: General Discussion
Topic: Sedoric warning "DOS is altered!"
Replies: 7
Views: 79

Re: Sedoric warning "DOS is altered!"

Put a master disk in the A drive and your slave disk in the B drive. You should be able to view it then.

I think it throws this message up if you insert an OricDOS disk after booting with Sedoric.
by Steve M
Sun Jun 25, 2017 10:20 pm
Forum: 6502 assembly coding
Topic: Mysterious program
Replies: 14
Views: 6747

Re: Mysterious program

Just noticed this thread - a bit late to reply , but have a look here.
http://www.48katmos.freeuk.com/pase.htm
by Steve M
Thu Jun 22, 2017 1:09 am
Forum: Technical questions
Topic: Compatible transister ?
Replies: 5
Views: 193

Re: Compatible transister ?

I think there's three. There's a couple around the tape output, one by the keyboard connection.
by Steve M
Wed Jun 21, 2017 12:04 pm
Forum: Technical questions
Topic: Compatible transister ?
Replies: 5
Views: 193

Re: Compatible transister ?

Thanks.
by Steve M
Tue Jun 20, 2017 9:09 pm
Forum: Technical questions
Topic: Compatible transister ?
Replies: 5
Views: 193

Compatible transister ?

Is the BC 547 compatible with the BC184 used on the Oric ?

This chap has them on his Oric but the spec says BC184.
https://www.youtube.com/watch?v=hnQKjJMuwQ0
by Steve M
Mon Jun 19, 2017 10:25 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

I got the big capacitors and swapped those and got over 5V so tested the system. Drive lights went on but it wouldn't boot. So I guess the interface is faulty too. I tried swapping drives just to see if the drive was duff but now the drives won't light up either. So maybe the power supply has gone a...
by Steve M
Mon Jun 19, 2017 1:14 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

Wasn't able to get a sensible resistance reading.

The other capacitors are 104, (as used on the Cumana interface).

Need to reassemble it before trying to get any other readings. Took some pictures for Didier though :)
by Steve M
Mon Jun 19, 2017 1:54 am
Forum: Mags and books
Topic: Any spare French books ?
Replies: 14
Views: 9536

Re: Any spare French books ?

Some are not as good as you might hope - but some books are very useful.

I have a list up above. If you want any of the books listed send my a bundle of notes and you can have some :)
by Steve M
Sun Jun 18, 2017 5:28 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

I'll try and do some pics. It's basically a black metal box. Not very exciting. The original configuration was with a single 3" drive right in the middle. There's a metal blanking plate which hides where a second drive can sit to the right. So it's a black box with a slot in the middle - or a black ...
by Steve M
Sat Jun 17, 2017 10:04 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

I will try to make a schematic from that power supply, but can't clearly see the track on the "bottom" side of your picture, but it looks really weird to have a tap of the transformer to feed directly the 7805, it should have a bridge rectifier before. And if the 4700uF capacitor has failed, the 78...
by Steve M
Sat Jun 17, 2017 12:45 am
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

I measured without a load, so I think both voltages are probably down. (The 12v was 11.85v or something.) I expected it to be more without a load - not sure if that's right, but when I measured a different variable voltage power supply it was putting out more than the voltage it was set to. I've got...
by Steve M
Thu Jun 15, 2017 10:03 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

So I'll change the voltage regulator. Should that sort it?
by Steve M
Thu Jun 15, 2017 9:27 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

Hmm. I'm getting just under 12V and around 3.8V

Is guess 3.8 is low - but is it enough to power a floppy drive?

Drives won't fire up. I tested the drive in my other system and it works.

Maybe the interface is faulty?
by Steve M
Wed Jun 14, 2017 8:06 pm
Forum: Technical questions
Topic: Transformer/ power supply
Replies: 23
Views: 714

Re: Transformer/ power supply

Here's a shot showing it is a Cumana power supply.