Search found 1276 matches

by IanS
Sat Jul 11, 2020 12:09 pm
Forum: 32-bit acorn hardware
Topic: RISC PC motherboard refurbish
Replies: 8
Views: 92

Re: RISC PC motherboard refurbish

sP1d3r wrote:
Sat Jul 11, 2020 5:20 am
The motherboard is in prime condition so using long-nose pliers I twisted the capacitors round until they came off, without ripping the solder pads off, because the PCB is robust and has complete coverage of ground plane.
:shock: :o
by IanS
Sat Jul 11, 2020 12:01 pm
Forum: 32-bit acorn hardware
Topic: Mounting a floppy drive in an A310
Replies: 14
Views: 199

Re: Mounting a floppy drive in an A310

Yes, very interesting, 1.27mm pitch headers are still available (even in surface mount). Who'll be first to try?
by IanS
Sat Jul 11, 2020 11:40 am
Forum: 32-bit acorn hardware
Topic: Mounting a floppy drive in an A310
Replies: 14
Views: 199

Re: Mounting a floppy drive in an A310

Marvin wrote:
Sat Jul 11, 2020 11:25 am
No idea, there are no clues on the PCBs, the text on my board is the same as the ones in the links you posted.
Thanks for looking.
by IanS
Fri Jul 10, 2020 9:26 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 4
Views: 102

Re: Repair thread: A310

I don't suppose anyone out there has the modules required to kick this EcoSCSI / Floptical SCSI interface into life? I'll be able to connect the drive up to another SCSI controller, but this interface card will be a bit of a white elephant without its software. (As a last gasp, perhaps a forum memb...
by IanS
Fri Jul 10, 2020 8:53 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 4
Views: 102

Re: Repair thread: A310

Very bare bones. 1MB (i guess), no backplane, RISC OS 2. The EcoSCSI cards work suprisingly well, though I've never tried it on RISC OS 2. I'll dig mine out, be interesting to see if the software versions are the same. What's the target? RISC OS 3, ARM3, 8MB, backplane, IDE/SCSI, Colourcard. I can h...
by IanS
Fri Jul 10, 2020 4:30 pm
Forum: 32-bit acorn hardware
Topic: Mounting a floppy drive in an A310
Replies: 14
Views: 199

Re: Mounting a floppy drive in an A310

That bracket mounts to the bridge over the motherboard with 2 screws that are on an offset, botton left & top right in this image (the top left hole is one of the two that is used to mount either a second floppy or a hard disc) A310 floppy mounting.JPG Curious, do you know who manfactured the ARM3 ...
by IanS
Fri Jul 10, 2020 2:13 pm
Forum: 32-bit acorn hardware
Topic: The Watford Gap
Replies: 19
Views: 920

Re: The Watford Gap

The way I've powered my Dual CF Card Interface is to uses what's supported on some cards (but not mine as I've has had to add a small jumper) and that's by using pin 20 to carry power from an IDE Interface to the CF Card Interface - nice and tidy :mrgreen: My podules supply power on pin 20, but on ...
by IanS
Thu Jul 09, 2020 9:46 pm
Forum: 32-bit acorn hardware
Topic: Mounting a floppy drive in an A310
Replies: 14
Views: 199

Re: Mounting a floppy drive in an A310

I appear to have the bracket pictured in the digram, but it only appears to have two screw holes to connect to the drive itself Aside from the issue of finding a FDD that will work with the 1772 and all the other interesting stuff I see on the A300 / A3000 schematic, it looks like the FDD is mounte...
by IanS
Thu Jul 09, 2020 9:35 pm
Forum: 32-bit acorn hardware
Topic: The Watford Gap
Replies: 19
Views: 920

Re: The Watford Gap

Just as an update on this, I give up. I've tested the thing on umpteen machines, RISC OS 2 and 3, and it does the same shit every time. I've tried it with different CF cards, different CF card interfaces, and with different physical drives too now - all the same result. No idea why the hell it work...
by IanS
Thu Jul 09, 2020 4:22 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2850
Views: 308552

Re: Worth Taking a Look At

sP1d3r wrote:
Thu Jul 09, 2020 3:59 pm
One of the disks has the folder unixhost - is this for iX?
Only in as far as it's a unix host - doesn't have to work with iX - http://chrisacorns.computinghistory.org ... lSuite.pdf
by IanS
Thu Jul 09, 2020 3:42 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2850
Views: 308552

Re: Worth Taking a Look At

sP1d3r wrote:
Thu Jul 09, 2020 3:35 pm
https://www.ebay.co.uk/itm/Acorn-RISCiX ... SwEWVfAw1O

Seller has other RISCiX items. :-&
Including an R260. I don't this specifc item is RIsCiX related, just looks like the standard RIC OS TCP/IP suite.
by IanS
Tue Jul 07, 2020 8:36 am
Forum: 32-bit acorn hardware
Topic: Serial to ethernet adaptor (?) - Free for someone to play with!
Replies: 6
Views: 212

Re: Serial to ethernet adaptor (?) - Free for someone to play with!

Haha, yes. That's nothing to do with serial, but old-school "thick net" (10base5) networking. You've got a thick-net to thin-net (10base2) MAU. Thick-net was "fun". You would apply a vampire tap to the main cable. You _had_ to place it at specific places on the cable (the cable had marks on it) and...
by IanS
Mon Jul 06, 2020 3:03 pm
Forum: 32-bit acorn hardware
Topic: Upgrading VRAM 1MB->2MB
Replies: 14
Views: 820

Re: Upgrading VRAM 1MB->2MB

danielj wrote:
Mon Jul 06, 2020 2:48 pm
Evidently this discussion has been monetised... Not convinced by the soldering job, mind...

https://www.ebay.co.uk/itm/303577253501
That listing pre-dates this dicussion. I mentioned it on the 1st June.
by IanS
Sun Jul 05, 2020 8:59 pm
Forum: for sale / freebies
Topic: VideoNuLA boards
Replies: 135
Views: 23360

Re: VideoNuLA boards

dhester wrote:
Sun Jul 05, 2020 8:38 pm
I've sent a pm and paid via paypal. But Not sure if PM has got to you as it appears to be stuck in my outbox.
Items stay in your outbox until read by the recipient.
by IanS
Sat Jul 04, 2020 10:36 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

That looks like the right keyboard to me? Looks like the keyboard that came with my A540. I guess the RISCiX models could have been different, but seems unlikely. Matches the picture in the brochure - http://chrisacorns.computinghistory.org.uk/docs/Acorn/Brochures/Acorn_APP480_R260.pdf edit: actual...
by IanS
Sat Jul 04, 2020 10:29 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

More weirdness :
I have been reliably informed that this is the wrong keyboard for this machine.
It is NOT the original keyboard and is no longer included on the sale.
I will be listing another keyboard shortly.
by IanS
Sat Jul 04, 2020 7:50 pm
Forum: 32-bit acorn hardware
Topic: The Watford Gap
Replies: 19
Views: 920

Re: The Watford Gap

iomanoid wrote:
Sat Jul 04, 2020 7:40 pm
Does anyone here want it for a tenner shipped (bearing in mind the postage is £4.10)? Otherwise it'll be part of a "buggered archimedes things" eBay auction I'll be sticking up soon.
Yes, please, I'll PM you.
by IanS
Sat Jul 04, 2020 1:23 pm
Forum: for sale / freebies
Topic: Econet Socket Hubs and Terminators
Replies: 14
Views: 339

Re: Econet Socket Hubs and Terminators

Is the RJ45 pinout compatible with the "blundell" standard? Can you enlighten me? I have some structured cabling in the house that I would use, are standard ethernet patch cables not suitable? The mapping of Econet clock and data pairs onto RJ45 cabling can be done in many ways. The first sockets t...
by IanS
Sat Jul 04, 2020 11:38 am
Forum: for sale / freebies
Topic: Econet Socket Hubs and Terminators
Replies: 14
Views: 339

Re: Econet Socket Hubs and Terminators

Is the RJ45 pinout compatible with the "blundell" standard?
by IanS
Fri Jul 03, 2020 4:13 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

Couple of extra pictures added.
Still not very clear, but CPU card is probably there. (capacitor showing near case edge, non-fpa arm the other end))
Battery damage looks managable.

Probably worth a punt.
by IanS
Fri Jul 03, 2020 2:32 pm
Forum: archive requests
Topic: Acorn Level 4 Fileserver Issue 3
Replies: 45
Views: 1437

Re: Acorn Level 4 Fileserver Issue 3

There was a very specific note about not using HC123 in some econet document which described the "chatter disconnect" (Sorry, I don't remember which doc this excert came from, also think it's been badly OCR'd at some point)
chatter_disconnect.PNG
by IanS
Thu Jul 02, 2020 9:32 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

flibble wrote:
Thu Jul 02, 2020 9:20 pm
It's 150 quid for one that's either not known to work or known to not work. I'd just avoid it tbh
£150 with 9 days to go. My guess it will hit over £500.
by IanS
Thu Jul 02, 2020 8:53 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

I've asked the seller about the CPU card and for a photo of the battery area, if I get a response I'll post here.... Wasn't that covered in the first post? - There's only one low-resolution photo of the innards, and the seller has told me the machine is all parcelled up already so he can't/won't no...
by IanS
Thu Jul 02, 2020 8:50 pm
Forum: 32-bit acorn hardware
Topic: (Project) DIY Ethernet cards for Acorn A4 and A4000 (ALA66 and mini-Podule)
Replies: 2
Views: 126

Re: (Project) DIY Ethernet cards for Acorn A4 and A4000 (ALA66 and mini-Podule)

More on this soon... I'm about to put my Mouser order in, but first I need to find out how long the pins on a Mini-Podule need to be... Sounds fantastic, can't wait for more detail. For the mini-podule pins, check the Acorn_A5000TRM_MiniExpansionCardDimensions.pdf file in the A5000 trm diagrams fil...
by IanS
Thu Jul 02, 2020 5:34 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2993
Views: 311437

Re: LOLPRICE

spanners wrote:
Thu Jul 02, 2020 5:20 pm
https://www.ebay.co.uk/itm/224063669930

:shock:

D.
Wow, that is, err, special.
I'll just print my own - http://chrisacorns.computinghistory.org ... nstall.pdf
by IanS
Thu Jul 02, 2020 2:06 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

IMG_20200702_140043.jpg
Taken from a similar angle you can just see the edge of the CPU card. Without the bracket, it could be just out of view.
by IanS
Thu Jul 02, 2020 1:13 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

SteveBagley wrote:
Thu Jul 02, 2020 1:07 pm
One of the images shows the floppy light on -- would the floppy light up with out a CPU?
Yes (just tried it)
by IanS
Thu Jul 02, 2020 12:07 pm
Forum: 32-bit acorn hardware
Topic: R260 - missing CPU card?
Replies: 25
Views: 719

Re: R260 - missing CPU card?

Also with no screws in the backplane or scsi card it would take seconds to get a good picture of the battery area. I suspect they know it's not good.

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