Search found 459 matches

by IanS
Mon Dec 05, 2016 1:39 pm
Forum: hardware
Topic: Archimedes Test ROMs
Replies: 26
Views: 1197

Re: Archimedes Test ROMs

Pernod wrote:Does anyone have the Test ROMs that are referenced in the A300 service manual? The ROMs replace Arthur to carry out memory tests.

I have some test roms that I got from Uniqueway along with a A3/4xx TRM on ebay many years ago. I've never tried them.
IMG_20161205_124337209_HDR.jpg
by IanS
Sun Dec 04, 2016 4:40 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

Thanks Ian I can bring my Atom along to the next meet or I can PayPal you some spons :) Cheers I might have to invest in a colour board and AtomMMC now :D Can they live in harmony or are they incompatible? Unless you are in a rush, It's probably best done at the next meet. We can then ensure it all...
by IanS
Sun Dec 04, 2016 4:35 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

Yes, it's just a PCB of the earlier Vero version. (74ls245 changed for a 244, the 245 made the vero layout easier) I'm supprised you swapped it the 245 would have made the design of the pcb easier as well. Or was it a cost thing? Interesingly enough there are versions of the 244 with the inputs &am...
by IanS
Sun Dec 04, 2016 12:04 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

Yes, it's just a PCB of the earlier Vero version. (74ls245 changed for a 244, the 245 made the vero layout easier)

It is just the original Atom Econet Rom.

Phil, One of the boards is earmarked for you, I offered to make you one, when you expressed an interest at an earlier Abug meeting.
by IanS
Sat Dec 03, 2016 4:40 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2652
Views: 171578

Re: LOLPRICE

£995 for a cd caddy?!!!! http://m.ebay.co.uk/itm/NEW-CD-Caddy-as-used-by-some-early-Sony-Apple-etc-CD-drives-/182350700543?hash=item2a74f2dfff%3Ag%3AkEQAAOSwXeJYJcFL&_trkparms=pageci%253Aea088060-b970-11e6-95a3-74dbd1a0385b%257Cparentrq%253Ac565bf671580a6a8d0d46e9effdfd2f1%257Ciid%253A6 And you...
by IanS
Wed Nov 30, 2016 9:02 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

If anyone I bored at Bolton with pictures of the Atom Econet PCB I'd had made at OSH Park was interested in how they turned out, they arrived in the post today. It works :D :D :D If I did it again, I'd change a few things, but it didn't require any bodge wires, so I'm happy. IMG_20161130_203138584_H...
by IanS
Fri Nov 25, 2016 7:29 pm
Forum: hardware
Topic: Pcb board making
Replies: 30
Views: 1770

Re: Pcb board making

I followed the contextual electronics tutorial for KiCAD - https://contextualelectronics.com/learning/getting-to-blinky-4-0/ It got me through designing my first real board, but I haven't had them back from manufacture yet. I went for the more expensive, but simpler option of OSH park https://oshpar...
by IanS
Sun Nov 20, 2016 6:19 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

Did the key that was found get reunited with its owner?
by IanS
Sat Nov 19, 2016 12:46 am
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

During Pizza consumption.
IMG_20161118_211410446_HDR.jpg

IMG_20161118_211403362_HDR.jpg
by IanS
Fri Nov 18, 2016 1:25 pm
Forum: hardware
Topic: Jaz 2GB on A3000
Replies: 6
Views: 342

Re: Jaz 2GB on A3000

So, to clarify you need the specific card's software, even to format and partition a device? I assumed as it showed up in *Devices, that a generic program would do the trick? Yes, mosy cards had custom software to partition and format. The "Devices command is (probably) provided by the softwar...
by IanS
Fri Nov 18, 2016 10:30 am
Forum: hardware
Topic: Jaz 2GB on A3000
Replies: 6
Views: 342

Re: Jaz 2GB on A3000

I'm trying to get a collection of the support software for variaous SCSI and IDE boards. I don't think I have the Serial Port software, but I'll check later. I don't think the MOFS software ever expected it to need partition support, as it was originally intended for things like flopticals, which we...
by IanS
Thu Nov 17, 2016 10:48 pm
Forum: hardware
Topic: Jaz 2GB on A3000
Replies: 6
Views: 342

Re: Jaz 2GB on A3000

RISC OS 3 on an A3000 won't support anything bigger then 512MB in a single partition.

Which SCSI card have you got?
by IanS
Mon Nov 14, 2016 3:07 pm
Forum: other vintage computer hardware, software and games
Topic: Resistor for slowing down a 12v fan
Replies: 7
Views: 414

Re: Resistor for slowing down a 12v fan

4K7 is too big.

http://www.ebay.co.uk/itm/Zalman-ZM-RC5 ... 1399060971 is basically just a 56 Ohm resistor, with appropriate connectors.

The 5V or 7V are worth trying.
by IanS
Fri Nov 11, 2016 4:40 pm
Forum: wanted
Topic: Does anyone have a 6 slice backplane(s) for RISCPC?
Replies: 7
Views: 467

Re: Does anyone have a 6 slice backplane(s) for RISCPC?

daveejhitchins wrote:Don't you need to move the terminating resistors, from the top pair to the next pair down, when you cut the backplane down for a 3 slice machine?


Probably, I'll leave that to Paul to do if he decides to cut it.
by IanS
Fri Nov 11, 2016 4:30 pm
Forum: wanted
Topic: Does anyone have a 6 slice backplane(s) for RISCPC?
Replies: 7
Views: 467

Re: Does anyone have a 6 slice backplane(s) for RISCPC?

Before I post the board to Paul, this is what the board looks like.
PICT4676.JPG

PICT4674.JPG
by IanS
Thu Nov 10, 2016 11:29 pm
Forum: wanted
Topic: Looking for a joystick
Replies: 13
Views: 724

Re: Looking for a joystick

by IanS
Tue Nov 08, 2016 10:59 am
Forum: for sale / freebies
Topic: Open To Offers: A5000
Replies: 4
Views: 525

Re: Open To Offers: A5000

Picture 4 is from an A3020.
by IanS
Sat Nov 05, 2016 3:49 pm
Forum: wanted
Topic: Does anyone have a 6 slice backplane(s) for RISCPC?
Replies: 7
Views: 467

Re: Does anyone have a 6 slice backplane(s) for RISCPC?

I have an 8 slot you could cut down (yes, they did have a "cut here" printed on the board).

What setup needed 6 podules?
by IanS
Thu Nov 03, 2016 10:22 pm
Forum: hardware
Topic: Battery Damage - A3000
Replies: 29
Views: 1206

Re: Battery Damage - A3000

The clue on the circuit diagram is the "NF", "Not fitted", and as there is space on the board for them, they fitted zero ohm resistors.
by IanS
Sat Oct 22, 2016 8:00 pm
Forum: off-topic
Topic: LEDs
Replies: 4
Views: 328

Re: LEDs

You also need to know the required current. Then poke the values into one of the many led resistor calculators.
e.g. http://ledcalc.com/
by IanS
Sun Oct 16, 2016 4:30 pm
Forum: general
Topic: "Outline specification for the BBC MICROCOMPUTER system"
Replies: 180
Views: 8564

Re: "Outline specification for the BBC MICROCOMPUTER system"

Several of us on here have working systems although they are quite temperamental! How do you stop the helium leaking out, or have you managed to replace the laser with a semiconductor variety? I've heard stories of 'rejuvenating' HeNe lasers by leaving them in a helium-rich atmosphere for a while (...
by IanS
Thu Oct 13, 2016 10:04 pm
Forum: hardware
Topic: HCCS TV modulator mini podule?
Replies: 2
Views: 199

Re: HCCS TV modulator mini podule?

Sounds more like something like this in a mini podule format.

http://chrisacorns.computinghistory.org ... PALTV.html
by IanS
Wed Oct 12, 2016 6:47 pm
Forum: general
Topic: "Outline specification for the BBC MICROCOMPUTER system"
Replies: 180
Views: 8564

Re: "Outline specification for the BBC MICROCOMPUTER system"

* I wish I could remember whether I ever gave Acorn a copy of my PAL encoder design. They are almost too similar for it to have been an example of 'two minds thinking alike' but not sufficiently so to be sure the BBC Micro circuit was derived from mine. I thought Steve or Sophie had mentioned in on...
by IanS
Sat Oct 01, 2016 10:30 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

sydney wrote:
  1. If you want to attend the curry please let me know in this thread.
  2. If you want to attent Arcade Club please let me know in this thread


Curry: Yes Please
Arcade Club: Dunno, will probably decide on the day. No need to book, so can just turn up.
by IanS
Sat Oct 01, 2016 10:27 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

Pizza Hut is within walking distance, it's where we went last time (in the rain)

https://www.google.co.uk/maps/@53.57919 ... 6656?hl=en
by IanS
Mon Sep 26, 2016 4:27 pm
Forum: hardware
Topic: UPURS v5 Not working: Purging Link..
Replies: 5
Views: 394

Re: UPURS v5 Not working: Purging Link..

I don't know the condition of the userport. It's the first time ever using it. :shock: (I'm pretty new to the BBC). The adaptor is dual voltage, jumper regulates the voltage.. somehow. This adaptor has a mini female USB connector. It's this one: http://www.ebay.com/itm/221789695553?_trksid=p2060353...
by IanS
Wed Sep 21, 2016 5:00 pm
Forum: past events & exhibitions
Topic: ABug North 18/19/20 November 2016, Bolton
Replies: 199
Views: 10852

Re: ABug North 18/19/20 November 2016, Bolton

mattyj wrote:Hi guys
So which hotel are people staying at?
Also what sort of parking is at the venue?


I'm close enough to travel up each day, but Holiday Inn is close by. Dave said he's staying at a Premier Inn.
by IanS
Mon Sep 19, 2016 6:33 pm
Forum: emulators
Topic: Creating HDF File
Replies: 7
Views: 604

Re: Creating HDF File

g7jjf wrote:I have replaced the previous file with one which is now 128MB in size.

I hope this is OK.

Fantastic.
Could you post how you created the file so others can create a file with the size of their own choosing? Thanks.
by IanS
Sun Sep 18, 2016 11:16 pm
Forum: stardot.org.uk
Topic: Saving PM messages.
Replies: 3
Views: 451

Re: Saving PM messages.

At the bottom of the page you can export as CSV or XML, could you mangle the XML into a form you could import into firefox?
by IanS
Sun Sep 18, 2016 4:57 pm
Forum: hardware
Topic: Making 1mhz bus connecting cable
Replies: 5
Views: 356

Re: Making 1mhz bus connecting cable

Is it simply that I need to ensure each end of the cable matches the other or is there some kind of trickery? - eg: notch at bottom and red trace on left hand side of both connectors? Just make sure the red stripe is on pin one of the connector and you can't go far wrong. The connectors normally ha...

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