Search found 62 matches

by CJE-4D
Fri Mar 13, 2020 3:33 pm
Forum: hardware
Topic: SA1100 for sale on ebay!
Replies: 10
Views: 460

Re: SA1100 for sale on ebay!

" this is not compatible with the RiscPC architecture or any other Acorn-era hardware. "
I thought it was like an SA110 with a very limited on board IOC and VIDC but are there other architectural differences?
by CJE-4D
Wed Mar 11, 2020 6:55 pm
Forum: general
Topic: My desolder station sucks!
Replies: 5
Views: 243

Re: My desolder station sucks!

Thanks Dave, I can't recall seeing the valves, so well worth another look inside.
by CJE-4D
Wed Mar 11, 2020 5:04 pm
Forum: general
Topic: My desolder station sucks!
Replies: 5
Views: 243

Re: My desolder station sucks!

if you're even slightly technically minded (and if you've owned a desoldering station i'd assume so) I see a few options. a Open it up check for perished hoses/seals and replace (see you've done this) b strip clean/refurb the pump, (might just be clogged up, or need new seals/gaskets) c put in a ne...
by CJE-4D
Wed Mar 11, 2020 2:56 pm
Forum: general
Topic: My desolder station sucks!
Replies: 5
Views: 243

My desolder station sucks!

The problem is it doesn't suck effectively in the literal sense. It is about 30 years old and we made very good use of it repairing BBC B etc. and fitting our A310 RAM boards but we didn't use it for 10+ years and now we have a need of one it is not working effectively, it sounds like it used to and...
by CJE-4D
Wed Mar 11, 2020 2:40 pm
Forum: hardware
Topic: SA1100 for sale on ebay!
Replies: 10
Views: 460

Re: SA1100 for sale on ebay!

Thanks. Very interesting.
by CJE-4D
Wed Mar 11, 2020 10:54 am
Forum: hardware
Topic: SA1100 for sale on ebay!
Replies: 10
Views: 460

SA1100 for sale on ebay!

https://www.ebay.co.uk/itm/Qty-1162-Intel-StrongARM-SA-1100-Microprocessor-new-unused-stock/202369080363?hash=item2f1e231c2b:g:1QwAAOSw2XdeHPca I quick search suggests the SA1100 is a SOC version of the SA110 AFAIK the SA110 has built in MEMC but no VIDC or IOC so what else does it incorporate? I w...
by CJE-4D
Fri Feb 28, 2020 2:44 pm
Forum: hardware
Topic: Acorn AKA20 We32206 Floating Point Co-Processor
Replies: 25
Views: 619

Re: Acorn AKA20 We32206 Floating Point Co-Processor

Is the FPU built into a 5x86 then?

I sold hundreds of our 5x86 133MHz 512k cache RISC PC cards at about £500 each so I probably did know the answer!
by CJE-4D
Fri Feb 28, 2020 12:52 pm
Forum: hardware
Topic: Acorn AKA20 We32206 Floating Point Co-Processor
Replies: 25
Views: 619

Re: Acorn AKA20 We32206 Floating Point Co-Processor

dp11 wrote:
Wed Feb 26, 2020 6:06 pm
On the RIscPC I did write the software to using the x86 card as the FPU. So if you have an 586-133MHz card that is probably the fastest FP Acorn machine.
What about the FP speed of an Aleph1 486Podule with CX83S87 fitted?
by CJE-4D
Fri Feb 28, 2020 12:38 pm
Forum: hardware
Topic: A3000 repair -- keyboard connectors
Replies: 9
Views: 375

Re: A3000 repair -- keyboard connectors

ADVERT MODE ON
If you are in the UK then we are cheaper after postage and will be quicker:
http://www.cjemicros.co.uk/micros/indiv ... TRA3K-2x13

Though the pins will need straightening which hasn't caused us any issues when fitting.

Chris
by CJE-4D
Sat Feb 15, 2020 11:27 am
Forum: hardware
Topic: A305 PSU let the smoke out
Replies: 7
Views: 380

Re: A305 PSU let the smoke out

We looked into an A310 PSU recently, it looks very like a BBC PSU inside, two of the normal 'smoking BBC caps' even had the same C number! and were/seemed (one was illegible) to be the same value.
by CJE-4D
Mon Feb 10, 2020 3:37 pm
Forum: hardware
Topic: A NEW BBC Micro Model B for £201
Replies: 4
Views: 476

A NEW BBC Micro Model B for £201

https://www.ebay.co.uk/itm/174175684590
I hope the antipodean winner enjoys their bargain!
Not sure why it went so cheaply.
by CJE-4D
Mon Jan 13, 2020 3:26 pm
Forum: wanted
Topic: EIAJ E8M video connector
Replies: 1
Views: 524

Re: EIAJ E8M video connector

If you're still looking (less than two years ago is like yesterday around here!) we've come across some. They should be on our website next weekend!
by CJE-4D
Tue Jan 22, 2019 12:54 pm
Forum: hardware
Topic: RiscPC PSU Connector
Replies: 1
Views: 381

Re: RiscPC PSU Connector

Maybe a bit too late for you now, but for future reference, we stock these here: http://www.cjemicros.co.uk/products/VAR-RPCPSUP
by CJE-4D
Wed Oct 17, 2018 4:53 pm
Forum: hardware
Topic: SCART plugs now rare! Sourcing recomendations please
Replies: 2
Views: 334

Re: SCART plugs now rare! Sourcing recomendations please

I need just the plugs, so we can make BBC to SCART leads etc.
I have looked into buying ready made up 3m+ SCART to SCART leads to cut them in half and put a 6 PIN DIN plug on the cut end, but the cables are two large a diameter for the DIN shroud.
by CJE-4D
Wed Oct 17, 2018 1:49 pm
Forum: hardware
Topic: SCART plugs now rare! Sourcing recomendations please
Replies: 2
Views: 334

SCART plugs now rare! Sourcing recomendations please

Farnell no longer stock any SCART plugs, CPC do but they are over £1 even in quantity, so any suggestions of other sources welcome please. If I buy 500 I can get them under £1 from: https://www.rapidonline.com/BKL-903011-Scart-Connector-50-9941?IncVat=1&utm_source=criteo&utm_medium=retargeting&utm_c...
by CJE-4D
Tue Sep 18, 2018 8:47 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 120
Views: 9576

Re: IDE interfaces - hardware details

Recommendations for connector source please. For our version of IanS's interface we will be optionally fitting a 44way female (horizontal entry) to let IDE to CF and IDE to SD interfaces be plugged in directly. We can get: https://uk.farnell.com/samtec/mms-122-01-l-dh/socket-2-0mm-horiz-2x22way/dp/...
by CJE-4D
Tue Sep 18, 2018 8:43 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 120
Views: 9576

Re: IDE interfaces - hardware details

i used simple "male pin strip" bought for pennies in the bay, cutted and soldered in 2 rows... if you have to cut.. what's about doing same thing with female ones? Female vertical are quite a bit more than "male pin strip" but it is the need for the connector to be horizontal that's putting the pri...
by CJE-4D
Tue Sep 18, 2018 4:47 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 120
Views: 9576

Re: IDE interfaces - hardware details

Recommendations for connector source please. For our version of IanS's interface we will be optionally fitting a 44way female (horizontal entry) to let IDE to CF and IDE to SD interfaces be plugged in directly. We can get: https://uk.farnell.com/samtec/mms-122-01-l-dh/socket-2-0mm-horiz-2x22way/dp/1...
by CJE-4D
Wed Jul 25, 2018 1:59 pm
Forum: hardware
Topic: PAL, MCU, EPROM, Flash programmer recommendations please?
Replies: 7
Views: 873

Re: PAL, MCU, EPROM, Flash programmer recommendations please?

Thanks for the replies. I've found the TL866 with a set of adaptors available from the UK for only £2 more than the Chinese listing Gerald found. https://www.ebay.co.uk/itm/TL866II-Plus-USB-Universal-Programmer-EFPROM-FLASH-8051-AVR-MCU-GAL-PIC-Kit/362327119196?epid=8019725463&hash=item545c61155c:g:...
by CJE-4D
Wed Jul 25, 2018 9:38 am
Forum: hardware
Topic: PAL, MCU, EPROM, Flash programmer recommendations please?
Replies: 7
Views: 873

PAL, MCU, EPROM, Flash programmer recommendations please?

For some Acorn & RISC OS projects I'm looking for a programmer, recommendations please? I'd like to get one that will do: 22v10 PLD 24 pin DIP SST39SF020 Flash RAM 32 pin PDIP ATTINY45 8 Pin Microcontroller 2764/27128 etc EPROMs I've found:https://www.ebay.co.uk/itm/TL866A-Universal-USB-MiniPro-EPRO...
by CJE-4D
Thu Mar 01, 2018 2:19 pm
Forum: hardware
Topic: Using an FPA10 @ 33MHz
Replies: 3
Views: 621

Re: Using an FPA10 @ 33MHz

Thanks for the suggestion and info. I've had more information from the previous owner that they are not sure if they ever actually used it! So I think 25MHz use is appropriate.
by CJE-4D
Wed Feb 28, 2018 4:35 pm
Forum: hardware
Topic: Using an FPA10 @ 33MHz
Replies: 3
Views: 621

Using an FPA10 @ 33MHz

I've an FPA10 that has come out of a 33MHz A5000. AIUI the FPA10 is rated for 26MHz use and the FPA 11 at 33MHz. I presume the A5000 will have been running it at 33MHz. Any suggestions for software to test the FPA10?
IIRC !Sick will confirm its presence.
by CJE-4D
Tue Nov 21, 2017 5:17 pm
Forum: hardware
Topic: RiscPC lost network access
Replies: 37
Views: 3412

Re: RiscPC lost network access

David, what IDE devices do you have?
We've seen your sort of problem when the IDE drive was Compact Flash or an IDE-SD adaptor.
by CJE-4D
Thu Nov 16, 2017 1:38 pm
Forum: hardware
Topic: RiscPC lost network access
Replies: 37
Views: 3412

Re: RiscPC lost network access

RISC OS defaults to a mask of 255.0.0.0
If the masks on other parts of the network (often 255.255.255.0) are different then Broadcasts of Shares will appear but data transfers won't work.
Chris
by CJE-4D
Tue Sep 26, 2017 7:50 pm
Forum: hardware
Topic: Acorn 3000 4mb Ram Expansion
Replies: 49
Views: 4546

Re: Acorn 3000 4mb Ram Expansion

paulv wrote:ISTR there are some 4MB RAM expansions for the A3000 that require a small flying lead...

Paul
Flying leads are used by 3MB upgrades they probably have 24 chips. 4MB upgrades never had a flying lead.
No motherboard jumpers to change for any RAM expansion (1, 3 or 4MB) that I know of.
by CJE-4D
Tue Aug 15, 2017 4:00 pm
Forum: hardware
Topic: SmallyMouse2 - Universal USB to Quadrature mouse converter
Replies: 64
Views: 8476

Re: SmallyMouse2 - Universal USB to Quadrature mouse converter

IanS wrote:Do you know who is doing the manufacturing for CJE?
Castle!

No not that Castle, but Castle Technologies in Stranraer!

n.b. we now have good stock of the assembled and programmed boards but only a few cases at present, we are having to wait until mid September for more case:-(

Chris
by CJE-4D
Wed Jul 12, 2017 2:56 pm
Forum: hardware
Topic: Fitting an external keyboard to A3010/A3020
Replies: 4
Views: 996

Re: Fitting an external keyboard to A3010/A3020

Great work.

Trying to keep things all inside the box for A3010/A3020's with duff keyboard controllers. I wonder if there is a way to connect a standard A3x00 keyboard up to the Archimedes type input.

I know of an as yet unpublished laptop keyboard (FFC connection) to USB interface...
by CJE-4D
Thu Sep 15, 2016 12:25 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2963
Views: 294185

Re: LOLPRICE

Unsurprisingly the "ACORN VINTAGE COMPUTER A3010" that sold for £2,550.00 has been relisted saying "RE LISTED DUE TO NON PAYMENT FRAUDULENT BIDDER." http://www.ebay.co.uk/itm/ACORN-VINTAGE ... 2248114757
by CJE-4D
Tue Sep 06, 2016 10:55 am
Forum: hardware
Topic: 5.25" Drive on RiscPC. Actilead wanted?
Replies: 3
Views: 495

Re: 5.25" Drive on RiscPC. Actilead wanted?

RobC wrote:I'm pretty sure I have an Actilead but unfortunately, part of the lead or connector has been cut off.

However, it may be possible to repair it if you're absolutely desperate.
We probably could repair it. so I would love it please.

I suspect you know the address!

Chris
by CJE-4D
Mon Sep 05, 2016 4:33 pm
Forum: hardware
Topic: 5.25" Drive on RiscPC. Actilead wanted?
Replies: 3
Views: 495

5.25" Drive on RiscPC. Actilead wanted?

We are trying to help someone who is replacing an A5000 with a RiscPC. He has a 5.25" drive connected to his A5000 and needs to continue to be able to read and write ADFS 5.25" discs. IIRC an Actilead was the preferred solution, does anyone have an Actilead they no longer need? (I expect to pay) Or ...