Search found 1873 matches

by steve3000
Fri Mar 16, 2018 6:13 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20288

Re: A3010 hard disc interface

Just a thought, how difficult would it be to add wiring and a socket for an extension ROM on the same board? (As in the A5000...because you have all the address and data lines already in place?) This would make the board a little larger (less so if extension ROM mounted underneath is a possibility) ...
by steve3000
Thu Mar 15, 2018 10:53 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2670
Views: 220854

Re: Worth Taking a Look At

https://www.ebay.co.uk/itm/323144519162

Title says A310 pcb, but it's an A305 as half the memory is socketted and not populated.

Seems to be mssing MEMC, VIDC and (strangely) the 9 pin RGB out socket, so needs some work, but could be interesting for someone.
by steve3000
Wed Mar 14, 2018 7:47 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20288

Re: A3010 hard disc interface

arananet wrote:Any chance to obtain the schematics of the working board? I mean the design of Vectorlight or Munchausen.

Thanks and Regards.
It was all on vectorlight's website last time I looked?
by steve3000
Sat Mar 10, 2018 6:35 am
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2670
Views: 220854

Re: Worth Taking a Look At

Quite a big gap at the back - does that make it an early-ish one? The presence of an aperture for a rear reset button makes it an Issue 1, doesn't it? I'm not sure I'm seeing an auxiliary power connector, so an early PSU as well? That looks really desirable; which could lead to a pretty ugly biddin...
by steve3000
Sat Mar 10, 2018 12:21 am
Forum: general
Topic: Today I received.....
Replies: 4742
Views: 320917

Re: Today I received.....

Ok, it wasn't the toughest quiz. It's since been populated. It's an ICS clone, so it works with ZIDEFS. It can also be fitted directly into the motherboard, so no backplane required, I'm quite chuffed, 11 days from start to finish, half of that waiting for the PCB to arrive. :shock: :D =D> Well don...
by steve3000
Sat Mar 10, 2018 12:16 am
Forum: wanted
Topic: 3D Construction Kit for Acorn Archimedes
Replies: 23
Views: 1718

Re: 3D Construction Kit for Acorn Archimedes

womagrid wrote:I noticed that a few days ago and put a bid in. I've just won the auction.
Well done!

Until this thread I didn't realise this had ever been converted for the Archimedes... I used it a lot BITD on my brother's Amiga though.

I'd be very interested to see some screenshots of the RISC OS version :)
by steve3000
Tue Mar 06, 2018 6:54 pm
Forum: wanted
Topic: FOUND! - Arm3 for my A3000
Replies: 10
Views: 723

Re: Wanted - Arm3 for my A3000

AFAIK the reason why they don't list it as being for the A3000 is because it requires desoldering the ARM2 and soldering in a socket... Hopefully someone else can confirm. d. Be careful because some of the earlier ARM3 boards are too high to fit underneath the A3000's keyboard. There's not much spa...
by steve3000
Sun Mar 04, 2018 11:35 pm
Forum: hardware
Topic: Good, modern, SCART TV
Replies: 28
Views: 1377

Re: Good, modern, SCART TV

Be careful if you are wanting to buy a brand new TV from a shop. I looked for a suitable brand new 18-24" widescreen LCD TV about 18 months ago - which needed to have at least a SCART input and a VGA input, to use with my BBC and Archimedes. However, having inspected and tested several major brands ...
by steve3000
Sun Mar 04, 2018 7:11 pm
Forum: general
Topic: Today I received.....
Replies: 4742
Views: 320917

Re: Today I received.....

It never struck me that the resolution of these early-90s machines were quite so minimal. But there it is. I see some Google images stated as being 640x480 and the like and they look so small on my machine now. And my screens are 15 years out of date. Open Paint and resize the canvas with the mouse...
by steve3000
Fri Feb 23, 2018 6:25 pm
Forum: hardware
Topic: A5000 Boot Error (Error Number &80000003)
Replies: 20
Views: 886

Re: A5000 Boot Error (Error Number &80000003)

Anyone know where the cmos C(0) and C(1) lines go other than the expansion backplane? I've looked all over the circuit diagrams without any luck, they must go somewhere! Straight into the IOC chip, but I forget which pins. Have you reverted back to base 2mb RAM (assuming that's what's on the pcb?) ...
by steve3000
Wed Feb 21, 2018 9:31 pm
Forum: hardware
Topic: A310: could blown C37 cap break monitor sync and WIMP GUI?
Replies: 8
Views: 633

Re: A310: could blown C37 cap break monitor sync and WIMP GUI?

Maybe I'm wrong, but if you don't have replaced the dead capacitor, could it be that 12V rail is missing? This could explain why the green LED works (+5V) but the spin motor is powered at 12V. If you can, confirm with a multimeter the voltages at the connector. Good thought, but C37 only provides 1...
by steve3000
Wed Feb 21, 2018 7:38 am
Forum: hardware
Topic: A310: could blown C37 cap break monitor sync and WIMP GUI?
Replies: 8
Views: 633

Re: A310: could blown C37 cap break monitor sync and WIMP GUI?

Next problem to tackle is that the floppy drive seems to be faulty. If I stick a floppy in and type the famous *. command, the green light comes on, but no whirring sound from the motor, let alone the loud chugging noises you'd expect, and then it claims that the drive is empty. I'm guessing that t...
by steve3000
Sun Feb 18, 2018 8:33 am
Forum: off-topic
Topic: Romance is dead
Replies: 6
Views: 610

Re: Romance is dead

BigEd wrote:I wonder what did it? The news of an Issue 1 selling on ebay???
My first thought was that it's just everyone who met their significant other on the forum, PM'ing them a Valentines day message...Maybe :?:
by steve3000
Sun Feb 18, 2018 12:32 am
Forum: community projects
Topic: Earliest examples of each machine?
Replies: 32
Views: 4479

Re: Earliest examples of each machine?

we have all seen an issue 1 now that one has just sold on eBay for £331 just for the original board, not the rest ...pics or it did not exist : There's also a photo of an issue 1 pcb with the same style printed serial number in the PCW magazine review from Jan 82. It was #10, and (probably coincide...
by steve3000
Sat Feb 10, 2018 4:17 am
Forum: hardware
Topic: BBC micro black linear PSU repair
Replies: 12
Views: 532

Re: BBC micro black linear PSU repair

Wow, thanks for the detailed write up Mark! This is exactly what I need :) This came from an issue 2 beeb, and will be returning to it once repaired. I'm fairly sure some early issue 3's also had the linear type psu, but I don't recall ever seeing an issue 4 with one. I expect many of these linear P...
by steve3000
Fri Feb 09, 2018 11:54 pm
Forum: hardware
Topic: BBC micro black linear PSU repair
Replies: 12
Views: 532

Re: BBC micro black linear PSU repair

Thanks Ian! I actually found that page about 30 seconds before I read your post, so yet to read it, but it's definitely got some useful photos :) This is a pretty battered PSU tbh, it's suffered from a failed attempt to open and repair it in the past (annoyingly these PSUs were riveted together, no ...
by steve3000
Fri Feb 09, 2018 11:23 pm
Forum: hardware
Topic: BBC micro black linear PSU repair
Replies: 12
Views: 532

BBC micro black linear PSU repair

I'm trying to restore a broken "linear" type PSU from an early beeb. I can't find much about these in the service manual, so other than re-soldering the broken bits, I'm not sure where to start with testing this. Has anyone here tackled one before? See pictures below - first thing to address are pro...
by steve3000
Tue Feb 06, 2018 11:11 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2670
Views: 220854

Re: Worth Taking a Look At

Unfortunately the vendor does not have any provenance for the machine and no idea where he acquired it. My heart says get this machine and restore it. My head and probably my better half too say leave it to someone else. #-o Spotted this too, and thinking the same thing. Definitely a shame about th...
by steve3000
Tue Jan 30, 2018 10:51 pm
Forum: hardware
Topic: bbc-fdc from Jasper Renow-Clarke
Replies: 5
Views: 649

Re: bbc-fdc from Jasper Renow-Clarke

Nice work! Keep posted of how your tests go - are you going to try to connect to a 5.25" drive too? I've got one of these and all the components, but not yet assembled. I'm also planning to write some controller software myself... However, that's mainly because I'm planning to use this to read Archi...
by steve3000
Thu Jan 25, 2018 9:44 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 257
Views: 9314

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

hoglet wrote:There is no video DAC - i.e. the TTL R G B inputs are just fed directly into the CPLD (so we have 1-bit RGB).
Ah, ok - very neat method! :)

So yes, you'd need 4 bits of each R/G/B to open up possibilities for other computers. Definitely something to explore if you can get DMA working in future.
by steve3000
Thu Jan 25, 2018 8:40 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 257
Views: 9314

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

Great work! And so much scope for this type of approach. I suspect this would also do really well on the Archimedes, particularly for retro gamers wanting 320x256 @ 50 Hz. Definitely worth testing on an Archie :) Back to the beeb, when building the digitised frame, are you using the pixel colour cap...
by steve3000
Wed Jan 24, 2018 11:54 pm
Forum: programming
Topic: ADFS Format
Replies: 28
Views: 2246

Re: ADFS Format

Brilliant resource, very useful to see this all in one place. Interesting to read about the 'G' format, I don't recall having seen that before, was it ever supported by RISC OS do you know? Or was it just theoretical?

Anyway thanks for sharing!
by steve3000
Wed Jan 24, 2018 9:17 pm
Forum: emulators
Topic: MODE 7 on RISC OS BBC Emulator 6502em
Replies: 15
Views: 1047

Re: MODE 7 on RISC OS BBC Emulator 6502em

OK thanks, I will put the question out over there. As you've posted up the mdf, I've taken a look and I'm sure that should work....unless of course the latest RISC OS build for ARMX6 is filtering or further restricting available modes despite being in the mdf (possibly based on EDID data from the m...
by steve3000
Wed Jan 24, 2018 9:00 pm
Forum: emulators
Topic: MODE 7 on RISC OS BBC Emulator 6502em
Replies: 15
Views: 1047

Re: MODE 7 on RISC OS BBC Emulator 6502em

jms2 wrote:I think I've tried mode 7 on my Raspberry Pi, running whatever version of Risc OS you get on there. I recall that it did not work.
It works very well on the Pi, *if* you load AnyMode :)
by steve3000
Wed Jan 24, 2018 12:12 am
Forum: emulators
Topic: MODE 7 on RISC OS BBC Emulator 6502em
Replies: 15
Views: 1047

Re: MODE 7 on RISC OS BBC Emulator 6502em

As above, it looks like the software MODE7 emulation hasn't kicked in. What dimensions is MODE 7 in the mdf that you have? There must have been changes to the MODE 7 emulation at some point in the development of RISC OS 5, because it changed from low resolution 320x256 frame size to higher resolutio...
by steve3000
Wed Jan 24, 2018 12:05 am
Forum: software
Topic: Black Angel
Replies: 31
Views: 1910

Re: Black Angel

Am I missing something or does travelling anywhere take ages? The first mission location for example took 40 mins to get too. My brother played this to death BITD. I do recall it taking a long time to complete some missions, but 40 minutes sounds much too long. Is there not a way to speed up time w...
by steve3000
Sat Jan 13, 2018 8:52 pm
Forum: general
Topic: Today I received.....
Replies: 4742
Views: 320917

Re: Today I received.....

A completely dead, but relatively unexpanded (apart from plug-in ICs) Issue 2 BBC model A: 20180110_232211.png 20180110_232122.png Not sure where to start with this one, but is nice to find one with no soldered-in sockets underneath. Last time I saw an issue 2 model A like this was in the early 90's...
by steve3000
Thu Jan 11, 2018 7:46 pm
Forum: off-topic
Topic: LOL DESCRIPTION
Replies: 606
Views: 61420

Re: LOL DESCRIPTION

https://www.ebay.co.uk/itm/253359708480

Love what he's done there! Definitely a rare combination :lol:
by steve3000
Sun Jan 07, 2018 10:50 am
Forum: hardware
Topic: Fault finding index
Replies: 96
Views: 24589

Re: Fault finding index

My recent beeb repairs: 1) http://stardot.org.uk/forums/viewtopic.php?f=3&t=12152 Seemingly random memory errors on an issue 3 beeb, likely caused by poorly fitting ICs or corrosion on IC legs... Solved by taking all socketed chips out, cleaning, and putting them all back in again. Also solved in th...
by steve3000
Sun Jan 07, 2018 10:26 am
Forum: hardware
Topic: Broken Beeb - strange memory issue, what to try next?
Replies: 12
Views: 871

Re: Broken Beeb - strange memory issue, what to try next?

After running Exile (which I had loaded from disc) successfully, I decided to install a SD card and SuperMMC ROM so I could use this beeb as my main 8-bit computer for a while to ensure it was really working OK. However, on plugging in the SD card and SuperMMC ROM, nothing happened. No evidence of t...