Search found 1851 matches

by steve3000
Mon Mar 19, 2018 11:02 pm
Forum: software: games - high scores
Topic: High Score Challenge - Centipede by Tricky
Replies: 72
Views: 2628

Re: High Score Challenge - Centipede by Tricky

I'd been meaning to try this out, having read so much about it and the high score challenge was the perfect opportunity - very nice conversion =D> Scored 13754 on my second go, so certainly room for improvement, just need to find the time! c1.png PS. I used BeebEm as the JSBeeb link doesn't work for...
by steve3000
Sun Mar 18, 2018 3:40 pm
Forum: wanted
Topic: 3D Construction Kit for Acorn Archimedes
Replies: 23
Views: 1684

Re: 3D Construction Kit for Acorn Archimedes

Ah, ok thanks, good to know it runs on RO3.

To send PMs you need to either have 25 posts, or ask one of the moderators nicely to enable them.
by steve3000
Sun Mar 18, 2018 3:10 pm
Forum: wanted
Topic: 3D Construction Kit for Acorn Archimedes
Replies: 23
Views: 1684

Re: 3D Construction Kit for Acorn Archimedes

:D

What version of 3D construction kit did you get from your purchase and does it work ok on RISC OS 3? There should be a readme file on the disc worth version and release date.
by steve3000
Sat Mar 17, 2018 10:53 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20069

Re: A3010 hard disc interface

...since the podule bus is designed with a 2kb addressable window...? Isn't it 4K words, it's just normally split in two for rom and peripherals. So you could use 4K, if you don't need anything else. Quite right Ian, hadn't considered that :) Even so, 4kb is still a bit limiting...but easily enough...
by steve3000
Sat Mar 17, 2018 1:10 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20069

Re: A3010 hard disc interface

The problem I forsee is what causes the OS to look for a 5th column ROM in that context? RISC OS 3 will look for the extension ROM whatever machine - just need to replicate the extension ROM select line and link up to the correct address lines (I expect...) remember, the A4 also has an extension RO...
by steve3000
Sat Mar 17, 2018 8:12 am
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2656
Views: 218950

Re: Worth Taking a Look At

Reviewing the pictures and the problems listed by the seller, I can say that it has a SMPSU. Also has a punched out perforated ashtray hole - the perforated ashtray appeared around the time that SMPSUs began being fitted at manufacture, mid way during issue 3 run I believe. Before that there were n...
by steve3000
Sat Mar 17, 2018 8:03 am
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20069

Re: A3010 hard disc interface

danielj wrote:Good point... Schematic?
Is this not online somewhere?

I've got it on paper. IC21 generates Rcs1*... I'll post up a picture later, but it's labelled ASIC, so one of the bank of custom ICs. Might be possible to work out from the inputs maybe...
by steve3000
Fri Mar 16, 2018 10:47 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20069

Re: A3010 hard disc interface

...humm...but then how's it done in the pre-IOEB A5000s? :?:
by steve3000
Fri Mar 16, 2018 6:13 pm
Forum: hardware
Topic: A3010 hard disc interface
Replies: 159
Views: 20069

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: 2656
Views: 218950

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: 20069

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: 2656
Views: 218950

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: 4705
Views: 317477

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: 1684

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: 711

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: 1354

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: 4705
Views: 317477

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: 860

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: 622

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: 622

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: 601

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: 4280

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: 504

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: 504

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: 504

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: 2656
Views: 218950

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: 637

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: 248
Views: 8242

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: 248
Views: 8242

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: 2201

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!