Search found 26 matches

by EdVoncken
Fri Jan 03, 2020 3:18 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Re: Electron with Plus1 and Plus3

Cleaning the Ferranti ULA seems to have helped - the keyboard responds normally now, next up is checking the video artefacts ;-)
by EdVoncken
Mon Dec 30, 2019 9:10 pm
Forum: hardware
Topic: Suitable battery pack replacements for the BBC Master
Replies: 13
Views: 915

Re: Suitable battery pack replacements for the BBC Master

Question about the battery pack: I could not find the absolute minimum voltage for the Master to retain its CMOS settings. Most packs use a 3.7V battery with a diode in series. This results in a backup voltage of around 3.0 Volts (3.7 - 0.7) I'm assuming that the CMOS chips draws less than 10 microa...
by EdVoncken
Sun Dec 29, 2019 9:46 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Re: Electron with Plus1 and Plus3

I captured a video (not sure if I can post that here) that shows the issue - it's intermittent so hard to pinpoint :( When this happens, several of the number keys result in a "0" being displayed instead of the actual number. For example, pressing "1234567890" results in "0230500000". Pressing "2222...
by EdVoncken
Sun Dec 29, 2019 7:12 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Re: Electron with Plus1 and Plus3

It’s an issue 4. Regarding the ULA cleaning: do I just take it out of the socket and use IPA on a cotton swab to clean the contacts?
by EdVoncken
Sun Dec 29, 2019 6:26 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Re: Electron with Plus1 and Plus3

Key issues are not so uncommon. They can usually be fixed by pressing the key repeatedly, or by unsoldering the key, removing the legs of the key and cleaning the legs. I’ve done this several times. The keys themselves seem to work fine - the machine starts spewing characters all by itself, without...
by EdVoncken
Sun Dec 29, 2019 5:03 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Re: Electron with Plus1 and Plus3

Starship Command loading from Plus1 ROM cartridge - seems to be using ROMFS.
by EdVoncken
Sun Dec 29, 2019 4:59 pm
Forum: hardware
Topic: Electron with Plus1 and Plus3
Replies: 11
Views: 310

Electron with Plus1 and Plus3

Hi all, A couple of months ago I got my hands on an Electron with Plus1 and Plus3 interfaces 8) Today, I completely took everything apart, photographed and cleaned it (no retrobriting). Electronics looked fine. On the outside, it's yellowed but looks very good after all these years. The floppy drive...
by EdVoncken
Mon Sep 30, 2019 8:28 pm
Forum: hardware
Topic: My main beeb from the 80s has died - FIXED
Replies: 32
Views: 1523

Re: My main beeb from the 80s has died

Would this be the point where you use freeze spray to look for temperature-sensitive components?
by EdVoncken
Sun Jun 09, 2019 6:06 pm
Forum: hardware
Topic: Making two BBC Master drive plinths with 2x 5.25" drives...
Replies: 6
Views: 426

Re: Making two BBC Master drive plinths with 2x 5.25" drives...

Wow, nice! How did you create the Master decals/labels?
by EdVoncken
Sun Jun 09, 2019 6:03 pm
Forum: hardware
Topic: Ample Rom query
Replies: 7
Views: 693

Re: Ample Rom query

The original EPROM may require a higher programming voltage than modern chips - I believe 25V was common.
by EdVoncken
Fri Apr 26, 2019 1:20 pm
Forum: hardware
Topic: Another BBC Master revived, thanks to this forum!
Replies: 6
Views: 603

Re: Another BBC Master revived, thanks to this forum!

tricky wrote:
Sun Apr 21, 2019 9:18 pm
Wow, we are good :lol:
Yes, you are ;-)
by EdVoncken
Fri Apr 26, 2019 1:19 pm
Forum: hardware
Topic: Another BBC Master revived, thanks to this forum!
Replies: 6
Views: 603

Re: Another BBC Master revived, thanks to this forum!

sweh wrote:
Sun Apr 21, 2019 8:28 pm
That will be because "paging" mode was on. Pressing SHIFT will take you to the next page. This is normal for a Master.
I still need to learn a lot about the Master ;-) Thanks for the explanation!
by EdVoncken
Sun Apr 21, 2019 2:13 pm
Forum: hardware
Topic: Another BBC Master revived, thanks to this forum!
Replies: 6
Views: 603

Another BBC Master revived, thanks to this forum!

Just came to say "thank you" to all the forum members ;-) Ran into issues after CMOS reset, but solved it in under 15 minutes thanks to https://stardot.org.uk/forums/viewtopic.php?f=3&t=14474&p=193681&hilit=master+cmos+reset#p193687 I got a BBC Master "for parts" on eBay as a nice refurb project. Af...
by EdVoncken
Sun Apr 07, 2019 1:50 pm
Forum: hardware
Topic: BBC Master PSU caps, replace?
Replies: 4
Views: 341

Re: BBC Master PSU caps, replace?

Thanks Daniel,

I powered it on, and it works! No smoke (yet).
Next up is installing the RetroClinic MultiOS; current year is 19A0 so I need a Y2k fix :D
by EdVoncken
Sun Apr 07, 2019 11:58 am
Forum: hardware
Topic: BBC Master PSU caps, replace?
Replies: 4
Views: 341

BBC Master PSU caps, replace?

Hi, I just opened up a Master PSU. The caps look different from the explodey types in my BBC ;-) Looking at the solder side, I see no obvious re-soldering. Now I’m wondering if these are original for the Master PSU? And, why are my pictures upside down? :D 70E6E325-D49E-4BD1-8B66-6C979C0167CC.jpeg 7...
by EdVoncken
Mon Mar 25, 2019 12:06 pm
Forum: software: other
Topic: Suggestions for backing up floppies with read errors?
Replies: 6
Views: 560

Re: Suggestions for backing up floppies with read errors?

danielj wrote:
Sun Mar 24, 2019 9:48 pm
... The kryoflux is expensive, but there is a much much cheaper option here: http://cowlark.com/fluxengine/
Ooh - this tickles my geek-senses ;-) I may just have to build one of these...
by EdVoncken
Sun Mar 24, 2019 9:16 pm
Forum: software: other
Topic: Suggestions for backing up floppies with read errors?
Replies: 6
Views: 560

Re: Suggestions for backing up floppies with read errors?

Thanks for the suggestions,

I will start by looking at UPURS. Interesting to see how much data can be recovered that way; I have some old school reports on those floppies ;-)
by EdVoncken
Sat Mar 23, 2019 9:58 am
Forum: software: other
Topic: Suggestions for backing up floppies with read errors?
Replies: 6
Views: 560

Suggestions for backing up floppies with read errors?

Hi, I’m trying to back up all my 5.25” floppies, written on my Beeb with 8271 and Watford DFS 1.43a back in the day. The discs do not appear to be mouldy; I’m using the DataCentre IMPORT/EXPORT commands to back up to USB .ssd images but it seems some discs have developed read errors. Is there a meth...
by EdVoncken
Wed Mar 20, 2019 7:38 pm
Forum: introduce yourself
Topic: Acorn Electron fan, just joined
Replies: 29
Views: 1062

Re: Acorn Electron fan, just joined

Welcome 0xC0DE - and like Paul said, beware of the retro bug...

It causes uncontrolled growth of your Acorn collection :D

Greetings from Eindhoven,
Ed.
by EdVoncken
Sat Mar 16, 2019 11:54 pm
Forum: hardware
Topic: Datacentre open source
Replies: 1
Views: 363

Re: Datacentre open source

Nice - the RamFS source should be an interesting read for me.
by EdVoncken
Fri Mar 15, 2019 11:47 am
Forum: for sale / freebies
Topic: B diagnostics/Tube USB serial adapter (FT232H)
Replies: 11
Views: 1667

Re: B diagnostics/Tube USB serial adapter (FT232H)

Hi,

Yes, I’d be interested in a kit - how can I order? Not sure if I can send PMs yet.

Kind regards,
Ed.
by EdVoncken
Tue Feb 26, 2019 8:48 pm
Forum: introduce yourself
Topic: Hello from the Netherlands ;-)
Replies: 17
Views: 1107

Re: Hello from the Netherlands ;-)

ultrasteve wrote:
Tue Feb 26, 2019 8:38 pm
For the yellowing on the case, I put 'oxy' in-wash stain remover in a plastic crate with warm water [...]
Thanks, I'll definitely try that!
by EdVoncken
Tue Feb 26, 2019 8:18 pm
Forum: introduce yourself
Topic: Hello from the Netherlands ;-)
Replies: 17
Views: 1107

Re: Hello from the Netherlands ;-)

And my first success story :D I bought a cheap BBC Model B on 'Marktplaats', in unknown condition. First, I removed all expansion boards (ATPL Sidewise ROM, Watford 32k RAM, Solidisk DFDC), left only MOS and BASIC ROMs installed. Tonight, I recapped the PSU and did a quick test - and guess what: it ...
by EdVoncken
Mon Feb 25, 2019 3:10 pm
Forum: introduce yourself
Topic: Hello from the Netherlands ;-)
Replies: 17
Views: 1107

Re: Hello from the Netherlands ;-)

Hi all, thanks for the warm welcome ;-)

Yes, I replaced the PSU capacitors - I must admit that I tried the machine before I got the new caps :oops: but fortunately the magic smoke did not escape :)
by EdVoncken
Sun Feb 24, 2019 10:34 pm
Forum: introduce yourself
Topic: Hello from the Netherlands ;-)
Replies: 17
Views: 1107

Hello from the Netherlands ;-)

Hi, I remember when, in the early eighties, me and my friends would go into the local electronics store and admire the new home computers. Most went with a Commodore or Sinclair, but I was strangely attracted to the BBC Micro. There I was in the shop, writing a simple BASIC program when it responded...