Search found 1434 matches

by IanS
Wed Nov 18, 2020 5:28 pm
Forum: general
Topic: Today I received.....
Replies: 6048
Views: 637284

Re: Today I received.....

BeebMaster wrote:
Wed Nov 18, 2020 4:59 pm
You know, I don't think I'd ever clocked before that the Elk has the keyboard fixed to the lid, like the Atom. The recycling of ideas and techniques throughout the history of Acorn never ceases to amaze me!
Memory failing in old age - http://www.beebmaster.co.uk/Elk/Elk9.html
by IanS
Wed Nov 18, 2020 8:46 am
Forum: for sale / freebies
Topic: FS: A3010 4MB Upgrades
Replies: 2
Views: 214

Re: FS: A3010 4MB Upgrades

Price reduced to £20, just want to get rid of them now. 3 left.
by IanS
Tue Nov 17, 2020 11:35 pm
Forum: 32-bit acorn emulators
Topic: The stupidestest RPCEmu question
Replies: 15
Views: 296

Re: The stupidestest RPCEmu question

IanJeffray wrote:
Tue Nov 17, 2020 11:14 pm
Point stands about it being apparently undocumented tho.
rpc_mouse.png
Fairly sure that's how I worked it out.
by IanS
Tue Nov 17, 2020 7:42 pm
Forum: 32-bit acorn hardware
Topic: Updates for an original A310?
Replies: 2
Views: 97

Re: Updates for an original A310?

A310 backplanes are a bit hard to come by. I'm not quite sure why but they can't take an A400 series backplane and Acorn's official backplane for the A300 series is only two-slot. I run an A310 with an IDE ipodule from Ian Stocks - amazing stuff. I suspect it needs RISC OS 3.1. The podule connector...
by IanS
Mon Nov 16, 2020 1:52 pm
Forum: for sale / freebies
Topic: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)
Replies: 11
Views: 552

Re: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)

XLV2K wrote:
Mon Nov 16, 2020 1:46 pm
Just counted the pins, its 44 , so that's answered .. re: PM, unfortunately I am new user and I can't send them yet. So pls @IanS if you can PM me. Thanks.
PM sent with email contact details.
by IanS
Sat Nov 14, 2020 1:43 pm
Forum: 32-bit acorn hardware
Topic: A3000 Risc upgrade
Replies: 6
Views: 292

Re: A3000 Risc upgrade

The card is not flashable. You need to desolder the existing eprom.
See here - viewtopic.php?p=241154#p241154
by IanS
Fri Nov 13, 2020 11:30 am
Forum: 32-bit acorn hardware
Topic: A3020 Keyboard problem? - Key presses display as '[xx]'
Replies: 2
Views: 101

Re: A3020 Keyboard problem?

Sounds like a control key is stuck down. You may have to dismantle the kayboard and give it clean.
Control +D = "[04]" etc.
by IanS
Thu Nov 12, 2020 10:57 pm
Forum: for sale / freebies
Topic: Suspicious A3020 eBay auction?
Replies: 9
Views: 391

Re: Suspicious A3020 eBay auction?

thecellartroll wrote:
Thu Nov 12, 2020 10:54 pm
Looks like there is probably an IDE podule in there too. Familiar looking bulge in the middle of the case.
Would be odd to have an IDE podule in an A3020, most people would use the on-board IDE interface.
by IanS
Thu Nov 12, 2020 2:56 pm
Forum: 32-bit acorn hardware
Topic: A30x0/A4000 power-on-reset / Brownout ?
Replies: 3
Views: 121

Re: A30x0/A4000 power-on-reset / Brownout ?

IanJeffray wrote:
Thu Nov 12, 2020 2:52 pm
I can't see any specific external PoR circuitry in any of the schematics - it looks like ARM250 receives power and is expected to be off to the races. Am I missing something?
Por pin 7 on the Arm250?
by IanS
Thu Nov 12, 2020 12:34 am
Forum: 32-bit acorn hardware
Topic: A3000 Risc upgrade
Replies: 6
Views: 292

Re: A3000 Risc upgrade

Looking to spend some time on my A3000. I have just added a hard disk controller and a hard disk but I might switch it for a compact flash so it's a bit quieter. It's on RISC 3 at the moment and I think I need at least 3.1 to prep the CF card. What's the recommended version to go to for a A3000 and...
by IanS
Thu Nov 12, 2020 12:30 am
Forum: 32-bit acorn hardware
Topic: A3000 Midi Card and g65sc51p-2
Replies: 2
Views: 136

Re: A3000 Midi Card and g65sc51p-2

It's part of the serial port upgrade - https://www.retro-kit.co.uk/page.cfm/co ... t-upgrade/
It is not needed for the midi card.
by IanS
Wed Nov 11, 2020 10:14 pm
Forum: for sale / freebies
Topic: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)
Replies: 11
Views: 552

Re: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)

guibrush wrote:
Wed Nov 11, 2020 7:19 pm
I would like to buy you a card, I will try to send you a PM (if the forum allow a newbe to do that :-)
PM sent with email contact details.
by IanS
Tue Nov 10, 2020 7:04 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1273
Views: 105561

Re: RGB to HDMI using a Pi Zero and a small CPLD

In Mode 23 the VIDC outputs 4 bits at a time, and is then serialised externally with a 96MHz pixel clock. I assumed it would need to pick up the parallel data.
In theory it would then be possible to run it on any Arc (not just A4xx/A540), as the 4 bits are available on PL3 (in an A310).
by IanS
Tue Nov 10, 2020 3:47 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1273
Views: 105561

Re: RGB to HDMI using a Pi Zero and a small CPLD

Would a dedicated version that supports the A4xx/A540 hi-res mono mode be possible? (I guess) It would need to pick up the signals internally, before the serializer. https://stardot.org.uk/forums/viewtopic.php?t=6202#p58967 https://stardot.org.uk/forums/viewtopic.php?p=130641#p130641 edit: extra lin...
by IanS
Wed Nov 04, 2020 9:31 pm
Forum: 32-bit acorn hardware
Topic: Software to image a ST506 hard disc?
Replies: 4
Views: 280

Re: Software to image a ST506 hard disc?

The attached zip contains, I think, the prgram I used. The file also contains the original program, which I can only assume Flibble sent me (but I honestly can't remember, sorry).

Hope that helps.
by IanS
Tue Nov 03, 2020 10:16 pm
Forum: 32-bit acorn hardware
Topic: Software to image a ST506 hard disc?
Replies: 4
Views: 280

Re: Software to image a ST506 hard disc?

viewtopic.php?p=181314#p181314

Modify the SCSiReader tool from the SCSITools.zip file in https://www.4corn.co.uk/articles/riscix121c/
(I'll see if I can find the modified version I used, but it will be tomorrow before I can get the machine out)
by IanS
Tue Nov 03, 2020 8:02 pm
Forum: for sale / freebies
Topic: FS: A3010 4MB Upgrades
Replies: 2
Views: 214

FS: A3010 4MB Upgrades

In the last batch of PCB's I had made I added a few of the 4-layer A3010 4MB boards to the order. The chips have been removed from NOS 4MB Simm's. They have all be tested in my A3010. I have 4 boards available. £30 £20 each, including UK postage. Any interest? IMG_20201030_115742.jpg IMG_20201030_11...
by IanS
Mon Nov 02, 2020 8:50 pm
Forum: acorn atom and acorn system series
Topic: Noise Killer Problem
Replies: 4
Views: 272

Re: Noise Killer Problem

Seems to only affect the close bracket.
viewtopic.php?p=264136#p264136
by IanS
Mon Nov 02, 2020 8:40 pm
Forum: acorn atom and acorn system series
Topic: Noise Killer Problem
Replies: 4
Views: 272

Re: Noise Killer Problem

Lose the space in line 70.

Code: Select all

70]
by IanS
Mon Nov 02, 2020 4:10 pm
Forum: 8-bit acorn software: other
Topic: OS 0.1 disassembly - is there such a thing?
Replies: 36
Views: 3870

Re: OS 0.1 disassembly - is there such a thing?

nigeb wrote:
Mon Nov 02, 2020 3:55 pm
There's a bit more to see in the leaflet, I've scanned the whole thing. And yes when I said "electron" I was half asleep :-)
(the image keeps uploading in lo-res, not sure why)
Large images are rescaled to save space. Link to somewhere else, or upload it in a zip.
by IanS
Sat Oct 24, 2020 7:56 pm
Forum: 32-bit acorn hardware
Topic: IDE interfaces - hardware details
Replies: 123
Views: 13600

Re: IDE interfaces - hardware details

Is it feasible for the ROM to be adapted so it presents itself as an ADFS filing system? (Which may involve accepting some ADFS shortcomings, like lack of partitions etc.) I think you have an original V1 card. So you should be able use the ROM image from the original ZIDEFS distribution, which has ...
by IanS
Sat Oct 24, 2020 2:09 pm
Forum: for sale / freebies
Topic: FS: 16-bit IDE podules
Replies: 36
Views: 4307

Re: FS: 16-bit IDE podules

swileman wrote:
Sat Oct 24, 2020 11:59 am
Hello. Apologies that I don’t post here often (or at all!).
I would like to order one of these with DOM if you still have one available. Thanks, Steve

Edit:
I should have added I have an A310 (was A305). No backplane AFAIK.
PM sent with email contact details.
by IanS
Fri Oct 23, 2020 7:20 pm
Forum: for sale / freebies
Topic: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)
Replies: 11
Views: 552

Re: FS: 8-bit IDE podules (A3010/A3020/A4000/A3000)

Sorry I don't appear to be able to send PMs for some reason (new user?) Do these allow the use of more modern hardware and support partitioning larger devices down to 500mbyte chunks? Or do they still depend on getting exact versions of older CF cards? The podules use a version of the ZIDEFS softwa...
by IanS
Fri Oct 23, 2020 2:42 pm
Forum: for sale / freebies
Topic: A540 RAM cards on eBay
Replies: 14
Views: 529

Re: A540 RAM cards on eBay

I notice that all these cards are 10QC MEMCs. Even the Acorn ones. Shouldn't they really be 12QC or am I misunerstanding the 12MHz-ness of A540 ? As I understand it, Acorn put the 10MHz parts though an extra qualification test (which was also published as a tech note thats not been found yet). The ...
by IanS
Fri Oct 23, 2020 10:50 am
Forum: for sale / freebies
Topic: A540 RAM cards on eBay
Replies: 14
Views: 529

Re: A540 RAM cards on eBay

IanJeffray wrote:
Thu Oct 22, 2020 7:55 pm
One more ... https://www.ebay.co.uk/itm/293795781841
I intially thought that was a 2-layer board, but I think it's 4-layer, but without power & grpund planes, just power tracks on the inner layers.
by IanS
Thu Oct 22, 2020 9:25 pm
Forum: for sale / freebies
Topic: A540 RAM cards on eBay
Replies: 14
Views: 529

Re: A540 RAM cards on eBay

IanJeffray wrote:
Thu Oct 22, 2020 7:55 pm
One more ... https://www.ebay.co.uk/itm/293795781841
Wow, never knew CJE did their own version.
by IanS
Tue Oct 20, 2020 11:51 am
Forum: 32-bit acorn software: other
Topic: Backup/Imager required for RISCOS 6.x due to Screeching Hard Drive - Now Sorted!
Replies: 18
Views: 481

Re: Backup/Imager required for RISCOS 6.x due to Screeching Hard Drive

I really need to have a option that will do the job first time reliably . . . 20 years of using !SparkFS to just create massive archives has worked for me without issue. I take the same simpleton approach for Linux and Windows machines - big archive of the whole lot every few months. On my 'main' R...
by IanS
Mon Oct 19, 2020 7:51 pm
Forum: 32-bit acorn hardware
Topic: A3010 and second IDEFS disk -- Solved
Replies: 7
Views: 221

Re: A3010 and second IDEFS disk

The watford card have an eeprom on board that is used to hold the configuration. You need the !IDEform app to setup the drives/
by IanS
Mon Oct 19, 2020 6:49 pm
Forum: for sale / freebies
Topic: A540 RAM cards on eBay
Replies: 14
Views: 529

Re: A540 RAM cards on eBay

SarahWalker wrote:
Mon Oct 19, 2020 5:59 pm
I was too fast! Ended up paying 2x£55 for two cards, instead of £69 for a pair :(
The Acorn card are much better quality, it's a miracle the atomwide cards work at all.

Go to advanced search