Search found 70 matches

by Naomasa298
Tue May 14, 2013 9:05 am
Forum: software
Topic: LCDGameModes released for RISC OS 3.1 computers!
Replies: 80
Views: 25169

Re: LCDGameModes released for RISC OS 3.1 computers!

Great stuff Steve, I will break out my games collection and test over this week. Going to try it with some ARM250 machines first.
by Naomasa298
Sat May 11, 2013 7:33 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

OK, thanks Tom, I'll do some more testing. Its encouraging to think that MEMC isn't necessarily trashed. This machine worked perfectly up until the point when it suddenly failed for no apparent reason other than a slightly crusty battery. I'll check all the address and data lines around the ROM soc...
by Naomasa298
Fri May 10, 2013 8:20 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2573
Views: 155413

Re: LOLPRICE

A new seller for this thread I think, offering a knackered (battery damaged) A3000 for £300 BIN! I've got 3 A3000s with Ultra Rare Internal Hard Drives here, if his sells then it's time to flog 'em! Actually, he says "We are also currently in the process of trying to aquire a working A3000 to ...
by Naomasa298
Fri May 10, 2013 9:14 am
Forum: hardware
Topic: 20 year old A3000, Zip, C compiler.
Replies: 14
Views: 1118

Re: 20 year old A3000, Zip, C compiler.

Have you checked the machine for battery damage? The A3000 is prone to some quite severe damage from leakage, so it's probably best to replace it before it gets any worse.
by Naomasa298
Fri May 10, 2013 9:11 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2573
Views: 155413

Re: LOLPRICE

Someone must have really wanted it, it went for £210! Well, it was in quite good nick, and doesn't come by much ... I noticed it was being sold by a forum member, so apologies for any offence! The price of stuff sold on auction does sometimes amaze me. I don't know much about pricing of 8 bit perip...
by Naomasa298
Thu May 09, 2013 8:53 pm
Forum: hardware
Topic: Best way to backup RISC pc hd
Replies: 12
Views: 1308

Re: Best way to backup RISC pc hd

I've got some of the CF/SD cards from APDL and I'm having endless problems getting them to work, although I'm trying to get them to run with 3.11 class machines. They'll probably be more compatible with a RiscPC though, just relating my experience. I have found the SparQ drives they sell quite usefu...
by Naomasa298
Thu May 09, 2013 10:13 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2573
Views: 155413

Re: LOLPRICE

Is this worth the price it's going for? http://www.ebay.co.uk/itm/Universal-Second-2nd-Processor-Case-Acorn-BBC-Micro-or-Master-Cheese-Wedge-MINT-/370806189549?pt=UK_VintageComputing_RL&hash=item5655c56ded I predict it'll go for way more than the £53 it's currently at. Whether it's worth the pr...
by Naomasa298
Wed May 08, 2013 9:56 pm
Forum: hardware
Topic: Resurrecting an A5000
Replies: 42
Views: 2520

Re: Resurrecting an A5000

I've had a chance to come back to the first machine, and I think I've found the problem. It wasn't recognising the floppy and any hard drives weren't reading properly either. Upon closer inspection, R282 between one of the floppy and IDE connectors appears to have overheated at some point. There was...
by Naomasa298
Wed May 08, 2013 8:21 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2573
Views: 155413

Re: LOLPRICE

A new seller for this thread I think, offering a knackered (battery damaged) A3000 for £300 BIN! I've got 3 A3000s with Ultra Rare Internal Hard Drives here, if his sells then it's time to flog 'em! Actually, he says "We are also currently in the process of trying to aquire a working A3000 to ...
by Naomasa298
Thu May 02, 2013 10:08 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2573
Views: 155413

Re: LOLPRICE

Is this worth the price it's going for?

http://www.ebay.co.uk/itm/Universal-Sec ... 5655c56ded
by Naomasa298
Mon Apr 29, 2013 10:42 am
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

Don't know if this will fit the PCB, but it looks like it has the same pin configuration, worth checking out. Mark Ah that looks slightly more in my budget :wink: I might get a battery at the same time. If it fits, let us know - one of my A3000s has a slightly damaged mouse port (the port works, th...
by Naomasa298
Sun Apr 28, 2013 3:24 pm
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

Pack of 50 for $54 - no idea if these are the right ones though:
http://www.pacificcable.com/Picture_Pag ... -64000-9SS
by Naomasa298
Sun Apr 28, 2013 1:14 pm
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

The underside of the board is in much better nick and barely looks bothered by the battery leakage. Annoyingly the pad I managed to total was the one nearest the front, could I solder a wire to the next point on the track, which appears to be a little resistor thing just below it (to front of compu...
by Naomasa298
Sun Apr 28, 2013 1:11 pm
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

If you visit the link below and check out all the maintenance links on the right, all the procedures were carried out to the newly supplied A3000 from APDL which had claimed to be refurbished. I came across a technique for restoring yellowed plastic by soaking it in peroxide and exposing to ultravi...
by Naomasa298
Sun Apr 28, 2013 9:44 am
Forum: off-topic
Topic: Why aren't Brotish computers world class?
Replies: 0
Views: 476

Why aren't Brotish computers world class?

This article on the BBC:
http://www.bbc.co.uk/news/technology-22291280

It's not so much the story, but have a look at the picture of the world's first webcam...
by Naomasa298
Sun Apr 28, 2013 1:53 am
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

How is the underside of the board where the battery connections are? You don't really need to solder the positive leads into both holes. If the solder pad underneath the board on the hole that's nearest the front of the computer is undamaged, just solder the fly lead on that. Just a question - are y...
by Naomasa298
Sat Apr 27, 2013 8:42 am
Forum: hardware
Topic: A3000 Connection!
Replies: 22
Views: 2896

Re: A3000 Connection!

Back in the day, when I had my original A3000, I hooked it up to a Cub monitor by poking wires directly into the connectors at the back of the A3000 and the the appropriate holes in the Cub's DIN socket (thanks, Acorn User!). My parents wouldn't trust me with a soldering iron. :lol:
by Naomasa298
Thu Apr 25, 2013 11:00 pm
Forum: hardware
Topic: My poor Master
Replies: 4
Views: 305

Re: My poor Master

Unfortunately yes, someone has blacked up the cartridge slots and speaker grill. The cartridge slots I can sort of understand, but why the speaker grill?!?! If I can get it working, I'll get out the model paints and see if I can whip up a batch of Acorn beige. The white stuff on the 0 key is a bit o...
by Naomasa298
Thu Apr 25, 2013 10:54 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Well, we have progress, sort of. Soldered in a new ROM socket, and also replaced L13 and L14 (which had also surreptitiously broken). No longer getting a ROM checksum error, which is good, and the machine now always gets to the red screen in the POST sequence - before, it would sometimes get there, ...
by Naomasa298
Thu Apr 25, 2013 3:55 pm
Forum: hardware
Topic: My poor Master
Replies: 4
Views: 305

My poor Master

Got it in a job lot of various Acorn related bits. As you can see, it's feeling rather sorry for itself - not in good condition and currently completely dead. I always wanted a Master (wasn't so keen on the Compact though). Not sure if I will have enough room to keep it, but for now, the next projec...
by Naomasa298
Tue Apr 23, 2013 7:43 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

2 out of 3 machines rescued - well done! Hope you can make it 3 out of 3. [-o< Removing the socket proved easy enough. I followed paulv's advice and cut the socket's plastic in order to remove the legs one by one. There was so much corrosion that some of the legs just broke away on their own at the...
by Naomasa298
Mon Apr 22, 2013 4:03 pm
Forum: hardware
Topic: A3000 - ropey mouse, RF output issue
Replies: 27
Views: 1412

Re: A3000 - ropey mouse, RF output issue

I'm no expert but I fixed a machine with a dodgy mouse socket recently. Most of the tracks relating to the mouse are underneath the board, so are somewhat protected from battery leakage damage. All I did to fix mine was briefly touch the soldering iron to the pins to melt and reform the solder.
by Naomasa298
Sun Apr 21, 2013 7:14 pm
Forum: past events & exhibitions
Topic: Wakefield Acorn Show / 20 April 2013 / W. Yorks
Replies: 205
Views: 12931

Re: Wakefield Acorn Show / 20 April 2013 / W. Yorks

What was the souped up Beeb on the Retro Software stand? Was it running a second processor?
by Naomasa298
Sat Apr 20, 2013 11:24 pm
Forum: past events & exhibitions
Topic: Wakefield Acorn Show / 20 April 2013 / W. Yorks
Replies: 205
Views: 12931

Re: Wakefield Acorn Show / 20 April 2013 / W. Yorks

VNo joy :( but because of the output to the monitor, Mark diagnosed a faulty Video ULA in 0.5 seconds. After 0.75 seconds, he had poked it with his magic finger, and BANG! (not literally :o ) a perfect picture! We removed the ULA and a leg fell off :shock: A quick visit to the solder station and th...
by Naomasa298
Thu Apr 18, 2013 11:25 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Machine 2's mouse proved easy to fix. None of the tracks on the underside of the board were damaged, so a quick touch of the soldering iron to the pins to melt and reform the solder fixed it. If only they were all that easy to resolve...
by Naomasa298
Thu Apr 18, 2013 9:41 am
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Hopefully, replacing the socket will cure it. I'm really interested in your technique for removing these large sockets. Would it be possible to provide some description or photographs? In the very first picture in this thread, some blue discoloration is just visible on the leftmost (disused) connec...
by Naomasa298
Wed Apr 17, 2013 10:46 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Having taken a closer look at machine 3, the fault code being reported was "ROM failed checksum error". Removing the RISC OS roms revealed badly corroded contacts, one of which had broken off in the socket for ROM 4. Hopefully, replacing the socket will cure it.
by Naomasa298
Tue Apr 16, 2013 9:44 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Well, I fitted a recently acquired HCCS IDE podule and drive to the machine, fired it up and checked out what software was on it. Launched !Textease and browsed through some of the saved files... it's somewhat spooky reading a document probably written by a 10 year old 20-odd years ago which says &q...
by Naomasa298
Tue Apr 16, 2013 3:22 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

You know, I really should pay more attention. When I tested machine 1, I was sure I'd picked a working mouse but you were all right, it was the mouse that was faulty. Testing it with another cheese wedge type mouse gives a working pointer. Hurrah! One down, two to go. :)
by Naomasa298
Sun Apr 14, 2013 11:49 pm
Forum: hardware
Topic: A3000 Battery Damage Repairs
Replies: 62
Views: 4731

Re: A3000 Battery Damage Repairs

Cheers Paul. Unfortunately, I don't think it's the mice at fault in this case - the ones I've used to test all work correctly on other machines. Still, with a bit of luck it shouldn't be a big deal to repair the first two machines. The thing about A3000 battery leaks for me is that the battery acid ...

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