Search found 1603 matches

by Kazzie
Sun Jul 12, 2020 7:00 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A3000
Replies: 1
Views: 44

Re: Repair thread: A3000

The alkali greenery was present on both sides of the board: IMG_20200710_1503204.jpg IMG_20200710_1516110.jpg The lower keyboard connector had gotten a bit too attached to the green gunk, and some of the carbon tracks were left behind when it was removed. (Unsurprising given that half a dozen keys h...
by Kazzie
Sun Jul 12, 2020 6:42 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A3000
Replies: 1
Views: 44

Repair thread: A3000

Here's another of the machines I've been asked to repair and refurbish: IMG_20200710_0758393.jpg An A3000 with a slightly yellowed keyboard, and a very yellowed pair of stickers. IMG_20200710_0759013.jpg At the rear we see that a Watford Electronics IDE interface is fitted. IMG_20200710_0759365.jpg ...
by Kazzie
Sun Jul 12, 2020 3:46 pm
Forum: 32-bit acorn emulators
Topic: Arculator v2.0 released!
Replies: 42
Views: 7905

Re: Arculator v2.0 released!

I've had a got at building Arculator for Linux (Arch, x86_64), but have gotten stuck with a compilation error. After running ./configure --enable-release-build and make , I get the following error when make is linking: /usr/bin/ld: arculator-cp15.o:(.bss+0x10): multiple definition of `arm3cp'; arcul...
by Kazzie
Sun Jul 12, 2020 2:33 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

Re: Repair thread: A310

I've taken a quick "all-files" copy of the SCSI drive's contents onto my A420/1's IDE/CF card. My PC with a SCSI card is up in the attic at the moment, but I can bring it down if needed. IMG_20200712_0945021.jpg The drive stayed in the A310 case as it's secured in place with double-sided foam tape, ...
by Kazzie
Sat Jul 11, 2020 10:53 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

Re: Repair thread: A310

Bingo, we're in. 8) IMG_20200711_2107168.jpg Many thanks for the EcoSCSI utility. The workflow of loading the floppy, running the utility, and then opening the SCSI disk, is a bit ornerous, though. Additionally, I've found that sometimes, after the A310's been running for a while, the floppy drive h...
by Kazzie
Sat Jul 11, 2020 8:59 pm
Forum: 32-bit acorn hardware
Topic: RISC PC motherboard refurbish
Replies: 12
Views: 245

Re: RISC PC motherboard refurbish

Please can the MODERATORS delete my post above, I'd hate to give bad advice but I'll continue doing myself :lol: thanks You can do this yourself to any of your posts, by using the cross button at the top right of the post. If you do it quickly enough, hardly anyone will know that you've made a fool...
by Kazzie
Sat Jul 11, 2020 6:01 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

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 Kazzie
Sat Jul 11, 2020 4:56 pm
Forum: 8-bit acorn hardware
Topic: A cool BEEB
Replies: 18
Views: 1004

Re: A cool BEEB

1024MAK wrote:
Sat Jul 11, 2020 12:11 pm
Are you sucking or blowing?

The coolest Beeb appears to be the Master Compact, as the PSU is not in the same case as the main board :mrgreen:

Mark
Hm, does that mean that Amstrad CPCs are therefore cooler than Beebs? :twisted:
by Kazzie
Sat Jul 11, 2020 9:04 am
Forum: 32-bit acorn hardware
Topic: Replacement 20mm mouse balls
Replies: 33
Views: 3655

Re: Replacement 20mm mouse balls

OK, so I'm now in a position to order these supposedly genuinely 20mm balls from mouseballz.com. I'll order 15, which will cost me $62.45, or $4.16 each. Works out at about £3.32 each at current PayPal exchange rate. Postage for one ball will be 83p within UK, second class large letter. For more ba...
by Kazzie
Fri Jul 10, 2020 9:32 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

Re: Repair thread: A310

Along with the A310 and other machines, there was one monitor to give a once-over to. It's an AKF11, a derivative of the Phillips CM8833 I already own. IMG_20200710_1101408.jpg There's evidence that a glare reduce of some sort was fitted at some point in the past, and the case itself was quite grubb...
by Kazzie
Fri Jul 10, 2020 9:05 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

Re: Repair thread: A310

Luckily, that firework of a capacitor failed open, so it's not causing any trouble at the moment. The machine booted up to RISC OS 2 quite happily, but made no acknowledgement of the SCSI interface, as expected. The required modules would be on that boot disk. The floppy drive wasn't succeeding in r...
by Kazzie
Fri Jul 10, 2020 8:24 pm
Forum: 32-bit acorn hardware
Topic: Repair thread: A310
Replies: 10
Views: 249

Repair thread: A310

I've been asked to repair/refurbish/overhaul some a few machines; first on the list is an A310: IMG_20200710_0725491.jpg IMG_20200710_0725562.jpg At the rear we see that a SCSI card is installed: IMG_20200710_0726116.jpg But on opening the lid, it turns out not to be a podule: IMG_20200710_0733544.j...
by Kazzie
Thu Jul 09, 2020 5:49 pm
Forum: general
Topic: Today I received.....
Replies: 5868
Views: 533720

Re: Today I received.....

Or would the PS/2 be likely to struggle because of an earlier version of the keyboard protocol? From the physical layout, I suspect you have a PC-XT Model F. ISTR its communication protocol differs from that used in the PC-AT (which is identical to the PS/2). It looks like you'll have an additional...
by Kazzie
Thu Jul 09, 2020 3:16 pm
Forum: general
Topic: Today I built ...
Replies: 77
Views: 7953

Re: Today I built ...

An excellent build. =D> Sticky tape and wood? too. :lol: Not everyone has a 3D printer, you know. ;) The two front USB ports were set together in rubber , for mounting on a PC back panel or similar. I used them as-is for the ports in the cartridge slot, but the spacing was too small to line up neat...
by Kazzie
Thu Jul 09, 2020 11:21 am
Forum: 32-bit acorn hardware
Topic: configuration A3010
Replies: 21
Views: 435

Re: configuration A3010

Naomasa298 wrote:
Thu Jul 09, 2020 11:20 am
Some early A3010s had an ARM2 on a daughterboard instead of an ARM250. These will be slower than an ARM250, but it can be upgraded to an ARM3.

They're much rarer though. I had one.
The ARM3 upgrade itself is also rare these days (and expensive!).
by Kazzie
Thu Jul 09, 2020 11:06 am
Forum: 8-bit acorn hardware
Topic: Unreliable ROMs / sockets in BBC B
Replies: 12
Views: 318

Re: Unreliable ROMs / sockets in BBC B

shakesc wrote:
Thu Jul 09, 2020 11:01 am
desoldering braid is my greatest find :D

So much easier than solder suckers (manual and electric). Just wish I tried it sooner :lol:
I've tried it many a time, but have yet to get good results myself: I keep turning back to my solder-sucker.
by Kazzie
Thu Jul 09, 2020 10:24 am
Forum: 32-bit acorn hardware
Topic: configuration A3010
Replies: 21
Views: 435

Re: configuration A3010

You might want to seek out a reputable dealer If you know a reputable dealer :) One dealer is CJE Micros , who specialise in Acorn machines. Their prices are expensive, but they're operating as a business, and test/refurbish all their equipment, so you're paying for that extra service and reassuran...
by Kazzie
Thu Jul 09, 2020 10:11 am
Forum: 32-bit acorn hardware
Topic: RISCPC Power Supply Refurbish
Replies: 30
Views: 491

Re: RISCPC Power Supply Refurbish

CJE lists 70W, 103W, and 150W models for sale.
by Kazzie
Thu Jul 09, 2020 10:03 am
Forum: 8-bit acorn hardware
Topic: Acorn Electron problem flashing picture and lines
Replies: 21
Views: 375

Re: Acorm Electron problem flashing picture and lines

From the video footage, I'd agree that it looks like a poor connection in the RF cable, or at one of the ends.

Have you tried the Electron and lead with another TV? If there's no change, I'd suggest trying a replacement lead.
by Kazzie
Thu Jul 09, 2020 9:59 am
Forum: 8-bit acorn hardware
Topic: Screen Flicker
Replies: 18
Views: 508

Re: Screen Flicker

rodders wrote:
Thu Jul 09, 2020 9:39 am
I fitted a new 16MHz crystal this morning. No more flicker, no more OSD popping up. FIXED!
You guys are brilliant!
Should this be added to the Fault Finding Index?
Please do!

(And congratulations!)
by Kazzie
Thu Jul 09, 2020 8:27 am
Forum: 8-bit acorn hardware
Topic: Unreliable ROMs / sockets in BBC B
Replies: 12
Views: 318

Re: Unreliable ROMs / sockets in BBC B

Hi Adam. The investigation you've summarised in the first post is top-notch work, well done. The suspect pin, pin 26 or A13, of the sockets for ROMs 12 and 13 (IC52 and IC58) are connected together, and are then connected via jumper/link S32 to either 5V or line 13 of the Address Bus. Setting this l...
by Kazzie
Wed Jul 08, 2020 10:21 pm
Forum: general
Topic: Today I received.....
Replies: 5868
Views: 533720

Re: Today I received.....

As it happens I've been having a rather Lego-themed week. At my in-laws' (now that we can visit freely) we've been sorting through my wife's old collection. Some of it belonged to her older sister, so there's a lot of Fabuland sets, as well as some later Robin Hood / Castle sets, and a Paradisa Ranc...
by Kazzie
Wed Jul 08, 2020 7:31 pm
Forum: general
Topic: Today I built ...
Replies: 77
Views: 7953

Re: Today I built ...

Here's my latest finished project: IMG_20200707_1446408.jpg I was given it to try to repair, but it had a terminal fault with one of the custom chips (RAM enable signal permanently on, even when accessing ROM), so the case has been repurposed into a birthday present: IMG_20200707_1443178.jpg A Raspb...
by Kazzie
Wed Jul 08, 2020 7:22 pm
Forum: general
Topic: Today I received.....
Replies: 5868
Views: 533720

Re: Today I received.....

IMG_2828.JPGWell actually last week. Didn't finish the laste project yet and the new one is already waiting :D Very nice: I've got the smaller 1030 and 1032 Technic sets. The latter was bought for me as a gift, the former was later scavenged from the school my dad taught at. They're currently in th...
by Kazzie
Wed Jul 08, 2020 6:37 pm
Forum: 32-bit acorn hardware
Topic: configuration A3010
Replies: 21
Views: 435

Re: configuration A3010

The main issue will be with the battery: these leak with age, and corrode the surrounding circuit. This can stop the machine from being able to boot at all. I suggest you ask the seller for clear pictures of the motherboard showing the battery area before you buy, or buy one that has already had its...
by Kazzie
Wed Jul 08, 2020 6:14 pm
Forum: stardot FORUM
Topic: Gotek/Flash Floppy/Mangle Wurzel etc
Replies: 3
Views: 191

Re: Gotek/Flash Floppy/Mangle Wurzel etc

It could be useful to summarise the groups of Acorn models and the config parameters they use: I seem to recall reading that Risc PCs need different settings to Archimedes machines.

But as I've never used one, I wouldn't be the best person to do a write-up. :(
by Kazzie
Wed Jul 08, 2020 6:06 pm
Forum: 32-bit acorn hardware
Topic: Iyonix video card
Replies: 3
Views: 237

Re: Iyonix video card

Later cards (GeForce FX) were more flexible, allowing them to natively support RISC OS's 32bpp pixel format, so the hardware mod was no longer used (however the cards didn't support RISC OS's 16bpp format, so those modes would come out red/blue swapped #-o) Sounds like they B*G*R*ed the RGB! :lol:
by Kazzie
Wed Jul 08, 2020 3:59 pm
Forum: 8-bit acorn hardware
Topic: Vine Micros Mk 2 Replay and Gotek
Replies: 171
Views: 4097

Re: Vine Micros Mk 2 Replay and Gotek

I have tried amending the colours of the saved TKV game (the gotek is currently plugged into the Master so I could try the nULA version of Mountain Panic) as that is what is on my disc and nothing I tried made any difference. I have changed the value of every colour slot and then reloaded. Nothing ...
by Kazzie
Tue Jul 07, 2020 8:02 pm
Forum: 8-bit acorn hardware
Topic: Vine Micros Mk 2 Replay and Gotek
Replies: 171
Views: 4097

Re: Vine Micros Mk 2 Replay and Gotek

Lardo Boffin wrote:
Tue Jul 07, 2020 7:52 pm
I will try to save a game of Vindaloo and then see if I get the same colour issues.

Sorry - got a bit distracted with the Vectrex. :oops:
Quite understandable: we all get distracted by shiny new toys. :)
by Kazzie
Tue Jul 07, 2020 8:01 pm
Forum: 8-bit acorn hardware
Topic: Vine Micros Mk 2 Replay and Gotek
Replies: 171
Views: 4097

Re: Vine Micros Mk 2 Replay and Gotek

Meanwhile, on the reverse engineering front, I've got roughly ninety subroutines or entry points labelled with a rough outline of what they're doing. Most of these insights came from strings in the code, calls to hardware/OS addresses, and just reading the assembly code. My next goal is to work out...

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