Search found 43 matches

by sh0dan
Wed Oct 16, 2019 5:57 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

Re: A confused A7000

Sorry to confuse things about the A7000+. My point was that the A7000+ didn't have that splash screen and I expected the A7000 and A7000+ to have similar ones. I would have thought that the ART logo was only used for certain upgrades. The ROMs that I use in RPCEmu are for RISC OS 3.71 (19 Feb 1997)...
by sh0dan
Tue Oct 15, 2019 10:20 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

Re: A confused A7000

Strange. The A7000+ doesn't have an ART boot splash screen like that. I wonder if the ROM is a replacement from another system. I love playing with them but am not very good with Acorns, however I believe the original (ART) pictures to be from an A7000 board and not an A7000+. While I do also have ...
by sh0dan
Tue Oct 15, 2019 10:16 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

Re: A confused A7000

The A7000+ was released after ART was closed iirc, so the relevant RISC OS (3.71?) doesn't have an ART banner. This machine looks to have been upgraded to 3.7, though I had thought that version could detect the ARM7500. Apologies for the delay in replying. I also have a partially working A7000+ boa...
by sh0dan
Sat Oct 12, 2019 7:37 am
Forum: wanted
Topic: Wanted: A7000 motherboard
Replies: 2
Views: 121

Re: Wanted: A7000 motherboard

stuslayer wrote:
Fri Oct 11, 2019 5:20 pm
If you want a guaranteed working board, CJE Micros is probably your best bet - not cheap but it will be working, so probably cheaper in the end than gambling on eBay ones
You could be right :(
by sh0dan
Wed Oct 09, 2019 10:30 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

Re: A confused A7000

steve3000 wrote:
Wed Oct 09, 2019 10:26 pm
The others probably have RISC OS 3.6 in that case?

RISC OS 3.7 introduced the Advanced Risc Technologies boot screen, along with the processor display at startup.
Ah yep, that is the case.
by sh0dan
Wed Oct 09, 2019 9:40 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

Re: A confused A7000

The ARM7500 is basically a 710 System-on-a-chip (a-la ARM250 so has all the IOMD and VIDC built into it), so as far as the OS is concerned it's a 710 :) d. Thanks for the quick reply, that makes sense. I wondered why it stood out. Guess the others boards don't print it so I hadn't seen it before :)
by sh0dan
Wed Oct 09, 2019 9:28 pm
Forum: hardware
Topic: A confused A7000
Replies: 12
Views: 282

A confused A7000

I've been going back through the motherboards I have to see if any work and found this one which confuses me... although that is easily done :D Its an A7000 board, 4mb memory but it looks a little different to the others: * The board is a lighter shade of green with more distinct white print on it. ...
by sh0dan
Sun Oct 06, 2019 4:40 pm
Forum: wanted
Topic: Wanted: A7000 motherboard
Replies: 2
Views: 121

Wanted: A7000 motherboard

I'm interested in buying an Acorn A7000 motherboard, if anyone knows of a cheapish one for sale.

I'm not having a lot of luck finding a working one. I've bought a few off Ebay which all had issues :(
by sh0dan
Sat Sep 28, 2019 9:48 pm
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

Thanks again Dave, fully installed.

I'm not sure what I was expecting on the Dos and Windows compatibility front, but a full windows desktop launched from OS/2 wasn't it :)
by sh0dan
Sat Sep 28, 2019 8:15 pm
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

Off we go then...

15 minutes in and were on disk 3 :) Its going to be a long night! I've formatted the hard disk so no turning back...
by sh0dan
Sat Sep 28, 2019 7:42 pm
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

it could be super fun installing from the 30 floppy disk the os is one and have a bad one in the middle of the install :P. remember me when i installed os/2 for the first time and also windows 95 :oops: Was thinking about this... so checked the floppy disks with my Kryoflux board ahead of installin...
by sh0dan
Tue Sep 24, 2019 7:12 pm
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

I'm hopeful to have some time this weekend or next and I'll post back with the result :D
by sh0dan
Sat Sep 21, 2019 10:24 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9345

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

I'm leaving soon from Norwich to come and say "hi" in Cambridge. Hopefully I'll see you all in a few hours, I'll be the ackward person trying to introduce themselves :D
by sh0dan
Sat Sep 14, 2019 7:56 am
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

daveejhitchins wrote:
Sat Sep 14, 2019 7:07 am
I don’t think anyone has actually said they want it (?) So I’ll bring it to Cambridge with me . . . Unless I hear from anyone above first.

Dave H :D
Thanks :D
by sh0dan
Fri Sep 13, 2019 9:52 pm
Forum: for sale / freebies
Topic: IBM OS/2
Replies: 20
Views: 920

Re: IBM OS/2

I don't want to deprive someone else so please offer it to those above first. However, if no one else is interested then I'd love to try it on my IBM Personal System 55 SX... I think it will run on its 386 SX processor... just. I'll happily pay postage or will be dropping in on the Acorn World exhib...
by sh0dan
Wed Sep 04, 2019 7:51 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

Well, its been a while but I'm still stubbornly working on this :D Essentially at the moment I get about 15 minutes a day with everything working! I currently have a daily routine which consistently produces the same results... Each day: * I turn the A7000 on and both the cd rom drive and hard drive...
by sh0dan
Tue Mar 05, 2019 11:17 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

I bought a 120mb IDE drive. Plugged it in... the A7000 booted without error and HForm identified it, then "drive not ready" when trying to format it. Subsequent boots... same error. So the pattern is that the first time it sees the drive it boots without error, having done the same with the CF adapt...
by sh0dan
Sat Mar 02, 2019 5:38 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

I've spotted something concerning.... On the IDE to CF adapter I was using one of the pins had broken off the CF connector. I have two different styles of CF adapter, one has "active" illuminated all the time and the other shows the same error while does work in an IBM PC. I don't have any working I...
by sh0dan
Sat Mar 02, 2019 3:36 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

On the circuit diagrams, watch for resistors marked "NF" for "Not Fitted", R142 on the RISC PC diagram is marked as "NF", So pin 95 and 100 should be unconnected, and 95 should be connected to 0V(GND) via R4. Thanks, I hadn't realised that. Following the same through on the diagram makes sense now....
by sh0dan
Sat Mar 02, 2019 9:46 am
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

If you're confident everything is connected and pulled up/down by the requisite resistors, I'd check for shorts next? d. Sorry I'm new to all this. Do you have any tips when checking for shorts or is it just a case of checking resistance between elements that probably shouldn't be connected? Also, ...
by sh0dan
Fri Mar 01, 2019 11:03 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

If you measure between the pin 19's on the HCT245's and pins 23 & 24 on the SMC, do yo see the 47 ohm resistance? If you don't then you probably need to follow the pcb tracks you can see and find the appropriate resistors. Whilst pin1's of the HCT245's are connected together, you also need to check...
by sh0dan
Thu Feb 28, 2019 11:33 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

If you measure between the pin 19's on the HCT245's and pins 23 & 24 on the SMC, do yo see the 47 ohm resistance? If you don't then you probably need to follow the pcb tracks you can see and find the appropriate resistors. Whilst pin1's of the HCT245's are connected together, you also need to check...
by sh0dan
Thu Feb 28, 2019 9:31 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

Don't look at the pin numbers on the buffers, they'll be mixed up as they'll be routed differently - you just need to make sure that the IDE connector end is connected to the buffer, and the buffer is connected to the SMC IC. That's why I suggest just gently running your probe along the pins. A bee...
by sh0dan
Thu Feb 28, 2019 2:59 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

Thanks both.

I originally found some of the buffered data lines on IC5 (the neighbouring chip) on the CPU, so I guess from what you've said that might be normal.

I'll recheck them all tonight and post my results.

Thanks again!
by sh0dan
Thu Feb 28, 2019 2:23 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

The 08 error is drive not ready, so as you did, 27 is where I'd look first. Checking the data lines is most easily done by taking each one at the IDC connector end then running your probe of your multimeter in continuity mode down the inputs to the buffer IC - that way if you get a single beep you ...
by sh0dan
Thu Feb 28, 2019 1:01 pm
Forum: hardware
Topic: A7000+ revival, pointers on where to start
Replies: 31
Views: 2150

Re: A7000+ revival, pointers on where to start

I've spent a lot of late nights on this over the months and would really appreciate any suggestions before I throw in the towel. I've posted here instead of on a new thread as its this post I found and read many times while working on this issue. I have an A7000 and three spare motherboards. All hav...
by sh0dan
Tue Jun 27, 2017 8:44 pm
Forum: hardware
Topic: A3000 - No video
Replies: 28
Views: 2382

Re: A3000 - No video

Nice ARM3! :D That's the reason. Arm3 doesn't fix this unfortunately, but the blanking should only happen for floppy discs, not hard discs, and only in high resolution (640x350 and above) 256 colour screen modes on 8mhz machines - that's only MODE 21, 28 and 40. All other modes should be fine. Than...
by sh0dan
Sun Jun 18, 2017 6:49 pm
Forum: hardware
Topic: A3000 - No video
Replies: 28
Views: 2382

Re: A3000 - No video

I will add that with an ARM3 fitted you should not see a black screen when accessing the diskette drive when in VGA mode. This means you have RO 2 fitted : it doesn't know you have a CPU with cache, and you need a small app to turn it on. Not the case with RO 3 where by default if you have an ARM3 ...
by sh0dan
Sun Jun 18, 2017 10:02 am
Forum: hardware
Topic: A3000 - No video
Replies: 28
Views: 2382

Re: A3000 - No video

10 euros + shipping and you'll pay upon reception. I think I've got 2 already assembled, about 180 to 200 cm long. 1 where the battery holder is near the Archie 9 pin connector ; 1 where it's near the SCART connector. No jack for the sound : I consider the Archie deserves to be connected to a hi-fi...
by sh0dan
Fri May 26, 2017 3:11 pm
Forum: hardware
Topic: A3000 - ShellCLI Unplugged
Replies: 6
Views: 511

Re: A3000 - ShellCLI Unplugged

It's a strange case we've got here. Sorry I can't help. PS unfortunately I still cant send any private messages. It looks like I have to be a member for a while before I can. An update on the A3010... hopefully arriving in the post Monday with a mouse, so I will be able to test with that if it does...