Search found 460 matches

by IanS
Mon Oct 23, 2017 11:41 pm
Forum: hardware
Topic: Arduino Filestore
Replies: 4
Views: 47

Re: Arduino Filestore

I mentioned a while back that I was working on getting an Arduino talking to an Econet card, in the last couple of days I've just about managed to get a reliable 4 way handshake working, which means I've been able to start implementing the file server operations: ... Right now this is very much a w...
by IanS
Wed Oct 18, 2017 6:29 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2457
Views: 168426

Re: Worth Taking a Look At

An Econet tester and software ... http://www.ebay.co.uk/itm/Acorn-Computer-Econet-Tester-/292298191627?hash=item440e54730b:g:igUAAOSwmeRZ52bl Could be one to re-engineer. It's on my list. I don't have the software, but I do have the hardware. Beebmaster also has one http://www.beebmaster.co.uk/Econ...
by IanS
Sun Oct 15, 2017 10:37 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 2236

Re: RISC-PC Not Working

Yes, that's basically it, except it "looks" like a triangle as the two diodes are both connected to the same 5V point on the backplane. There's no diode in the battery holder, it's just a 3xAA battery holder which has 3 rechargeable batteries in. So what I hope I've done is to allow the R...
by IanS
Sun Oct 15, 2017 9:23 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 2236

Re: RISC-PC Not Working

5V on backplane has 2 diodes connected to it, one in one direction, t'other in th't t'other. One diode goes to the battery 5V so that the diode blocks the battery from keeping the computer powered. The other diode connects to 5V on the clock chip, at that point it is also connected to the battery 5...
by IanS
Sun Oct 15, 2017 8:05 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 2236

Re: RISC-PC Not Working

BeebMaster wrote:5V on backplane has 2 diodes connected to it

Sounds wrong.
by IanS
Sun Oct 15, 2017 8:01 pm
Forum: general
Topic: Today I received.....
Replies: 4225
Views: 225839

Re: Today I received.....

Over the past week really… An Acorn AKA31 SCSI Podule off eBay and from CJE, an AEH54 Ethernet Podule and MEMC1A chip. Hopefully, this will let me get to the point being able to run RISC iX on one of my Archimedes. Steve It's fairly easy to convert the AEH54 to add an AUI connector, makes connectin...
by IanS
Sun Oct 15, 2017 6:46 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 2236

Re: RISC-PC Not Working

philb wrote:If you are using a rechargeable battery, one diode suffices.

Or a master battery pack, which will already have a diode in.
by IanS
Sun Oct 15, 2017 3:25 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 2236

Re: RISC-PC Not Working

You need another diode, so the battery isn't trying to power the whole machine when the power is off. Something like this:-
arc_clock.png

Diagram based on the A300 clock/battery circuit.
by IanS
Sat Oct 14, 2017 9:47 pm
Forum: hardware
Topic: Computer Concepts 32K and 128K sideways ROM?
Replies: 12
Views: 268

Re: Computer Concepts 32K and 128K sideways ROM?

It could use a similar system to the Watford roms:-

viewtopic.php?f=2&t=9272&p=106787#p108446
by IanS
Sat Oct 14, 2017 9:39 pm
Forum: software: other
Topic: BBC Domesday Project - Source code available
Replies: 13
Views: 621

Re: BBC Domesday Project - Source code available

I'll claim a small part in this recovery. This is the machine that Xavier bought on Ebay - http://www.ebay.co.uk/itm/Working-Acorn-A500-prototype-archimedes-LOFT-FIND-/122622471946 http://stardot.org.uk/forums/viewtopic.php?f=16&t=13540&p=177673 I think Dave (Arcadian) collected the machine,...
by IanS
Sun Oct 08, 2017 7:49 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 61
Views: 3418

Re: BeebSCSI mini

flynnjs wrote:Sorry for the delay, I've now made them available on my store webpage.

Your T&C's are still silly.

http://www.xeropage.co.uk/shop/index.ph ... ent_only=1
by IanS
Sun Oct 01, 2017 3:28 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

Re: ST-506 Hard disc image creation

If you modify this prog to copy the whole drive, it ends up looking almost identical to crj's proposed code posted earlier. You will need to edit the program with the correct source disc size (PSize%), and the location of the output file. Thanks, I think I now have an image of the drive. I pressume...
by IanS
Sat Sep 30, 2017 5:56 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

Re: ST-506 Hard disc image creation

BeebMaster wrote:Can you use dd within RISCix?

Yes, in theory.

I think that just trades one problem into many others. I'd then have to work out how to get networking working and a way to copy the file from RISCiX.

I'll probably just stick with the file level copy I have.
by IanS
Sat Sep 30, 2017 4:29 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

Re: ST-506 Hard disc image creation

If you have a SCSI podule in your A440, you could file copy everything to a SCSI drive and image that using a SCSI-fitted PC using Linux DD? (I know, lot of assumptions..) I already have a file level copy of the data, I was trying to get a bit-for-bit disc image. Doesn't seem like there is anything...
by IanS
Sat Sep 30, 2017 1:21 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

Re: ST-506 Hard disc image creation

I was trying to avoid having to write anything, I was looking for something that would just work. I don't have any other ADFS hard disc to try it on, and I don't want to be using the old drive any longer than necessary. I came across this a couple of years ago -- looks like the programming has alre...
by IanS
Sat Sep 30, 2017 12:42 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

Re: ST-506 Hard disc image creation

How's your programming? It may be worth seeing whether ADFS_DiscOp 1 gets data off the disc. If it does, write a loop to read a few hundred kilobytes at a time and store them somewhere; you might be home and dry. I was trying to avoid having to write anything, I was looking for something that would...
by IanS
Sat Sep 30, 2017 12:12 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 370

ST-506 Hard disc image creation

If I had an old ST-506 drive connected to an A440, what would be a way to create a bit-for-bit copy of the drive. I have IDE and SCSI drives to put the image on, which can then be copied over Econet or Ethernet to other machines for safe keeping. I had planned to use !FCFS to read the drive, but it ...
by IanS
Mon Sep 25, 2017 6:11 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

tricky wrote:
IanS wrote:...
Thanks.

Anyone want to swap room?


I haven't paid yet, but am happy to swap.

Thanks tricky.
by IanS
Sun Sep 24, 2017 8:11 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

sixxdog_uk wrote:Sorry Ian , you are quite right , i knew i'd miss someone out. :(

Mark (Retroclinic) is a non kit sunday only so i'll put you in his slot and move mark to the non kit list ,

In short yes ,you're in :)

Thanks.

Anyone want to swap room?
by IanS
Mon Sep 18, 2017 4:24 pm
Forum: hardware
Topic: BBC SD Card on Ebay
Replies: 12
Views: 551

Re: BBC SD Card on Ebay

I'm sorry if some of you have a problem with this Just to be clear, I don't have a problem with these being sold, I was just curious who was selling them. They look good, I'd been thinking of doing something similar to Lazarus's SD card that fits under the beeb, but these are probably close enough....
by IanS
Sun Sep 17, 2017 5:07 pm
Forum: hardware
Topic: BBC SD Card on Ebay
Replies: 12
Views: 551

BBC SD Card on Ebay

by IanS
Fri Sep 15, 2017 8:07 pm
Forum: projects
Topic: Screenshot accessory for Arthur desktop
Replies: 4
Views: 468

Re: Screenshot accessory for Arthur desktop

IanS wrote:Interesting, I'll give this a try when I next have my switchable OS machine out.


It did get tried at the Abug meet in January, only just got round to getting the pics off my phone.
by IanS
Mon Sep 11, 2017 9:17 pm
Forum: upcoming and recent events & exhibitions
Topic: Retro Computer Festival - CCH, Cambridge - 16 & 17 September 2017
Replies: 28
Views: 1215

Re: Retro Computer Festival - CCH, Cambridge - 16 & 17 September 2017

This event is next weekend, anyone planning to go?

I should be there on Saturday from about lunch time.
by IanS
Wed Sep 06, 2017 7:41 pm
Forum: off-topic
Topic: little cap 10u, what is +/- pic inc
Replies: 7
Views: 200

Re: little cap 10u, what is +/- pic inc

The positive"+" is marked on the cap, + looks to be towards the top edge of the board (bit blurry to be sure).
by IanS
Sat Sep 02, 2017 10:28 am
Forum: hardware
Topic: A680s
Replies: 16
Views: 706

Re: A680s

Boydie wrote:Not too sure why this took four ROMs to achieve - there doesn't seem to be an awful lot of functionality.

They data needs to be 32-bits wide to be executable at power-on.
by IanS
Mon Aug 14, 2017 7:45 pm
Forum: hardware
Topic: SmallyMouse2 - Universal USB to Quadrature mouse converter
Replies: 30
Views: 1527

Re: SmallyMouse2 - Universal USB to Quadrature mouse converter

Do you know who is doing the manufacturing for CJE?
by IanS
Tue Aug 01, 2017 9:19 pm
Forum: hardware
Topic: BBC A3000 + Watford Electronics ARM3 - installation woes
Replies: 24
Views: 793

Re: BBC A3000 + Watford Electronics ARM3 - installation woes

I've tried my luck with and without the expansions, I have gone back to fully stock for now (1MB, no IDE). No change. Thanks about letting me know to reset the CMOS by holding R - that's something I would have missed. That doesn't seem to help either I'm afraid (as said getting the "key stuck&...

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