Search found 313 matches

by Silicebit.
Tue Oct 02, 2012 6:59 pm
Forum: Technical questions
Topic: Speaking about microdisc PSU.
Replies: 1
Views: 5980

Speaking about microdisc PSU.

Hi!

I would like to see photos of inside the microdisc power supply. Would someone have the amiability to do them and put it here?

Components side and solder side, please.

Thanks in advance.
by Silicebit.
Tue Sep 25, 2012 6:54 pm
Forum: Technical questions
Topic: Microdisc PSU
Replies: 4
Views: 9647

Re: Microdisc PSU

I'm using a 7.5V 1A psu to power my Atmos and it work fine and cold. I recommend use a 7.5V psu instead a 9V psu for 7905/7805 regulators.

Igotafro, I suggest to use a transformer with 7.5Vx2 1A or 1.5A windings to feed 7905 and LM323, and a 15V 1A transformer to feed to 7812.
by Silicebit.
Mon Sep 24, 2012 9:33 pm
Forum: Technical questions
Topic: Microdisc PSU
Replies: 4
Views: 9647

Re: Microdisc PSU

Then... The transformer inside of microdisc psu has three output windings? One for Oric computer, one for 5V microdisc and one for 12V microdisc?
by Silicebit.
Sun Sep 02, 2012 8:17 pm
Forum: Tape and floppy disk converters
Topic: Tape deck dying - solution?
Replies: 9
Views: 24100

Re: Tape deck dying - solution?

I think you should clean all the pulleys and rollers of dragging.
by Silicebit.
Mon May 14, 2012 7:06 pm
Forum: Games
Topic: The Hobbit on Oricutron
Replies: 3
Views: 6606

Re: The Hobbit on Oricutron

I think Slicebit is a member (rings a bell), so he might help. Now that I think about it I should register too... I am spanish and it is a retro forum where they speak about the Oric! :shock: What! I'm hearing ring a bell.:D I say the same to you Chema, we will be proud to have you between ourselves.
by Silicebit.
Mon May 14, 2012 7:03 pm
Forum: Games
Topic: The Hobbit on Oricutron
Replies: 3
Views: 6606

Re: The Hobbit on Oricutron

I was googling Oricutron, and I came upon a thread on a spanish forum (retrowiki.es) where they were dicussing The Hobbit, and it was mentioned that it doesn't work in Oricutron (TAPE ERROR). I couldn't register on the forum (and I don't speak spanish, but google translate helped), but if someone h...
by Silicebit.
Sat Mar 10, 2012 4:26 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

From "Réalisez un contrôleur de disquettes pour votre Oric (type Microdisc) Par Thierry Bestel (partie 2 / 3)" "J'ai relevé sur cette carte les chronogrammes diffusés sur la disquette trimestrielle du MAG de mars 2002. Ces chronogrammes sont une aide précieuse pour vérifier et compren...
by Silicebit.
Thu Mar 08, 2012 7:29 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

That's true but... Is the Phi2 output an open-drain output? (the 6502 is a N-MOS device) :wink: . Looking at Oric schematic i think no.
by Silicebit.
Mon Mar 05, 2012 1:18 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

the IC5 pin 2 signal has a strange shape.. Normally phi2 provides a square signal shape and a "pull up" resistor of 3.3k is there for that. The 3K3 pull up resistor is lost in my two Microdisc, i'll put them and i'll see the wave again. Also, the IC5 pin 2 signal has a level of, 3 squares...
by Silicebit.
Mon Mar 05, 2012 1:10 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

Dbug wrote:I did not realize that phpBB3 came with a built-in attach pictures feature. Cool :)
Trick, trick. :wink: :D
by Silicebit.
Sat Mar 03, 2012 7:07 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

Hi again!

A pics of Phi2 signal on my oscilloscope:

Output of IC5 pin 18 and input of IC20 pin 1.
IMG_0859.JPG
IMG_0859.JPG (174.35 KiB) Viewed 20784 times
IMG_0861.JPG
IMG_0861.JPG (210.17 KiB) Viewed 20784 times

Input of IC5 pin 2.
IMG_0860.JPG
IMG_0860.JPG (164.11 KiB) Viewed 20784 times
by Silicebit.
Sat Mar 03, 2012 5:35 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

Hi! In the article, Réalisez un contrôleur de disquettes pour votre Oric (type Microdisc) part 2/3 , from Thierry Bestel, is mentioned a disquette issued quarterly with the Microdisc chronogrammes. Someone has the above mentioned disquette? Please, i'll be very grateful if the holder send me a priva...
by Silicebit.
Sat Mar 03, 2012 2:49 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

I think that is a good idea, you can change the number of drive without dismantle all Microdisc.
by Silicebit.
Sat Mar 03, 2012 10:24 am
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

Hi nobbysnuts!

When i press the reset button nothing happen, some times the pattern on screen change, other times no. I tested the flat cables and all ok, i think the problem can be with signal integrity (Phi2) and others, and a unshielded flat cable.
by Silicebit.
Fri Mar 02, 2012 9:36 pm
Forum: Technical questions
Topic: Faulty Microdisc?
Replies: 16
Views: 25533

Re: Microdisc faulty?

Thanks Symoon, for the fast reply.

Yes, i tried without the Atmos' PSU too and the Microdisc power the Atmos thru the expansion port, but same results. I forget to say that the two Microdisc don´t work on the three Atmos.