stardot.org.uk

A Beeb used in a news article about vaccinations

https://www.bbc.co.uk/news/av/health-48 ... nity-works

Not sure why but hey ho it's there!

Paul

It sounds like the driver is working fine and it's more likely to be config of the ip stack under 4.39. I wouldn't confuse things by trying to soft load RISC OS 6 until you're up and running with RISC OS 4.39 as that's a known to work config with the latest drivers you have on your card in other peo...

IME, hangs on boot with uniboot of any flavour is down to different versions of SharedCLibrary coming into play. Try *unplug SharedCLibrary and then boot using uniboot. The hang is usually due to uniboot trying to soft load a different version of SharedCLibrary on top of a version that's outdated or...

When it arrived, my heart sank. Was the envelope badly mangled? I hope that wrapping the board in thin card provided adequate protection. Was that still present? Dave If I didn't know any better I'd have to say that it looked like it had been deliberately by about 2 inches on one side to have a loo...

When it arrived, my heart sank.
But, the contents are in perfect condition
Thanks Dave

Paul

I've PM'd you but it sounds more like it's a card configuration thing rather than anything else. The card can be used with 10-base-T and 10-base-2 and I believe it defaults to 10-base-2 so there's some config to do if you want to use 10 base T which should activate the card once it has a physical co...

My friend had an Atari 2600 then he had a Dragon 32, then a C64. I had the Beeb at about the same time he had the C64. Then in around 1989, we both got Amiga 500's. We played all sorts of games on his Dragon 32, I don't remember much else about it but then again, I was about 9 years old at the time....

Take the board out. Just be gentle. You're fairly unlikely to break anything else. Do the job properly :) Snipping it out is the way forward though! Given the daughter board is soldered onto the motherboard what you're suggesting is not an insignificant task. If Simon is feeling brave then fair eno...

Without removing the board it is tricky indeed. There's not a great deal of room to work. This is how I'd approach it. 1. snip the legs of the old chips as near to the body of the chip as possible so there's plenty of leg to get hold of. 2. heat up and remove each leg using an iron and some tweezers...

I've updated my POST error calculator page so it can now accept a POST error code on a URL, pre-filling the calculator form which may be useful for people on stardot when helping to fix people's Arc's. e.g. The error code for the recent A310 which was fixed was &00020101 so the URL would be: https:/...

Happy Dance

Paul

litwr wrote: ↑

Fri May 03, 2019 11:38 am

Is it known when this IFEL ARM3 @36MHz was released?

The IFEL board is copyrighted 91-92 and my CPU has what looks suspiciously like it could be a date code of 9213TV. So if I were to say 1992 I don't think I'd be a million miles away as the IFEL board was also used for 25MHz ARM3 CPU's.

Paul

If you could add my name to the list for a board I'd appreciate it.

Thanks

Paul

I do miss those old early days when there was loads of different computers, and making a purchase was like crossing a minefield :lol: My parents attended a seminar about home computers held in the Sheffield branch of Debenhams on the Moor which took people through all the different computers availa...

The main issue I see with this now is that we can't see if there any battery damage to the PCB or RAM expansion board so if there's a dodgy track, replacing the chips won't fix it. I know it's tricky but I think desoldering the board would have to be my next step after the chips have been verified s...

I can try the re-seating when the PLCC tool arrives. Do the ARM3 boards just lift out by manually pulling then? The capacitor on the audio driver is a factory fitted thing so if you have any beep at all, the audio should be OK. So since myelin reports having the same cap too, thats 3 upvotes for it...

So I just tried this but same code reported, 00020101. I don't know if its relevant or not, but the keyboard is unresponsive during the POST sequence - caps lights cant be toggled for example. I know the keyboard is ok, because it works on the other machine. That sounds fine so let's break down wha...

Have you done another DEL on power on since getting the VIDC clock reconnected? If not, do this first to see if the CMOS RAM checksum error goes away. If it does, then we're making progress. If not then we may have a common issue in reading the CMOS and accessing RAM so it'd be a look at the schemat...

Ok, so are you booting without the colour card fitted? If so, you may be missing the jumpers you need to connect the sysclock to the VIDC chip at the very least.

You will need a jumper on 1-2 and 3-4 of PL3a to use the machine without the colour card I believe.

Paul

I seem to recall reading an explanation of why the CMOS RTC used in the Archimedes range stops if left unpowered for years due to a bit field in the CMOS RAM which isn't set, used or reset by the RISC OS roms when a DEL on power on is performed. IIUC, after being unpowered for years it can randomly ...

I needed to debug the M3000 configuration jumpers - looks like description of converting an M5000 to M3000 at https://www.retro-kit.co.uk/page.cfm/co ... -Expander/ is slightly wrong. The jumper wires go to the correct pins, but the signal descriptors are wrong. IC32 pin7 is 1MHz bus D5, and IC32 p...

Continuity to the PLCC socket looks good and all the painted resistors have resistances that are pretty much the same on both boards. This is looking like a dead PLCC to me but I have no viable way to conclusively test if that's the case. The pain is that these Simtec cards are just really good in h...

Is it one of these? http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/Simtec_IDE.html I think I have a similar setup, I have two, one works, the other doesn't. I wonder what the long term stability and reliability of the printed resistors is? (Look carefully at the data bus connections f...

There's not a lot on these boards, a 29010 EEPROM and a QL8X12B-ZPL68C, a couple of through hole caps a handful of SMT resistors and de-coupling caps, jumpers, the sockets and four 10K resistor networks. I've got two of these boards, one is working, the other, not. The EEPROMS are socketed and I've ...

That IFEL ARM3 upgrade is the UBER rare only ~400 CPU's made 36MHz version of the ARM 3 chip. The fastest ARM3 there is...

For a tenner for the entire machine, I'd say you have the bargain of the century if only the ARM3 board works...

Paul

These remind me of the BMW at cars.

Paul

Yes Paul that was it! The Shift lock and Caps lock were the wrong way around. Well done! It was exhausting doing this. Now I can have some fun with it! :) Ah, cool. I don't have a keyboard to hand for reference so I doubt I'd have spotted the switched "lock" keys even if I was given a few weeks to ...

pixelblip wrote: ↑

Sat Apr 27, 2019 2:01 pm

Oh shucks I didn't see that one!

Since you were first Paul there will be a little suprise for you

Thanks, but no surprise is needed . 3 is missing it's shifted character too... Is this the one you were thinking of?

Paul

pixelblip wrote: ↑

Sat Apr 27, 2019 1:42 pm

There's a mistake in those pictures - see if you can spot it!

@ seems to be reversed.

Do I win something?

Paul

Well, I won't be able to make it after all today. Gutted

Paul