Search found 70 matches

by sdsolle
Sat Jan 27, 2018 6:55 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2656
Views: 218757

Re: Worth Taking a Look At

tricky wrote:Why do I get so excited when I see red function keys :lol:
Never seen them in a briefcase before! Anyone know they're DIY efforts, or something exciting like an early version of the Acorn Communicator?
by sdsolle
Sat Jan 21, 2017 5:45 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2656
Views: 218757

Re: Paul Fray Control Systems I/O board

...well it is listed as "Tested and working"... So surely the seller must know, unless he hasn't really tested it? :?: [-X Haha – looks like they sold an "Acorn CM-43/2-5073 2M/G MAIN PCM Motherboard 0192,105" before Xmas. Oh god! I bet some random research department decided they'd had enough of p...
by sdsolle
Sat Jan 21, 2017 5:21 pm
Forum: software
Topic: Porting ARM BASIC to the Raspberry Pi via SDL 2.0
Replies: 8
Views: 1575

Re: Porting ARM BASIC to the Raspberry Pi via SDL 2.0

My question is: would anybody be interested in collaborating with me on this project? A month on and not a single reply. Is there really no interest in porting Sophie's BASIC to non-Acorn platforms like the RPi or Android? Or is it that there's interest, but nobody with the right skills to contribu...
by sdsolle
Sat Jan 21, 2017 4:45 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2656
Views: 218757

Paul Fray Control Systems I/O board

Stumbled across this on eBay, and it brought rather a smile to my face: http://www.ebay.co.uk/itm/Paul-Fray-Ltd-i-o-Expansion-Card-100-350-/361826850547/ I don't think the seller realises it's an Archimedes podule – there's no mention of anything remotely Acorn-y the listing, and since Paul Fray mos...
by sdsolle
Wed Sep 23, 2015 9:45 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2656
Views: 218757

Re: Worth Taking a Look At

I think if we were to club together to get them, after scanning and sharing the correct home for them would be the museum for computing history or the like... Don't do anyone any good stuck on a shelf. d. Agree with that . . . I'll do my best :wink: I'm not bidding. If a joint fund is needed, I'm w...
by sdsolle
Wed Jul 23, 2014 10:24 pm
Forum: hardware
Topic: Black blank screen
Replies: 33
Views: 2335

Re: Black blank screen

Hi Sean , yep tried that . nothing :( I think this ones doomed for the spares box :( OK, let's take a step back. The Beeb service manual urges you to carry the tests out with RGB connected - are you Europe? Do you have a telly with a SCART socket? If so, buy/build yourself a Beeb->SCART lead. (If y...
by sdsolle
Wed Jul 23, 2014 9:24 pm
Forum: emulators
Topic: Can any Acorn emulators save UEF cassette images?
Replies: 4
Views: 1878

Re: Can any Acorn emulators save UEF cassette images?

CMcDougall wrote:BeebEm414 defo works for me!

Comms > Tape Control,
press Record, then put in name of the .UEF :D
Ahah! Thanks :)
by sdsolle
Tue Jul 22, 2014 12:35 pm
Forum: hardware
Topic: How to source some screws?!
Replies: 5
Views: 677

Re: How to source some screws?!

If anyone's ever really stuck sourcing screws, Clerkenwell Screws are amazing: https://shopfrontelegy.files.wordpress.com/2013/11/clerkenwellscrew-ckwlr-ec1-1846_1200.jpg (Photo from the Shopfront Elegy blog ) I've turned up there in person with random bolts which they've identified in seconds "… yu...
by sdsolle
Tue Jul 22, 2014 10:40 am
Forum: hardware
Topic: Black blank screen
Replies: 33
Views: 2335

Re: Black blank screen

Hi Conrad -
1024MAK wrote: Try changing screen mode, so type MODE 0 and see what happens. Also try the other screen modes.
Did you try this?

Cheers,

Sean.
by sdsolle
Tue Jul 22, 2014 9:34 am
Forum: general
Topic: Today I received.....
Replies: 4697
Views: 317012

Re: Today I received.....

A mismatched pair of 7438 buffers plus 32K of static RAM …

https://www.flickr.com/gp/solle/3FvR55

… and a neat little gizmo for measuring USB voltage and current inline …

https://vine.co/v/M2X916n2QBH
by sdsolle
Sat Jul 19, 2014 2:45 pm
Forum: hardware
Topic: Advice on connecting up the EuroBeeb
Replies: 61
Views: 4231

Re: Advice on connecting up the EuroBeeb

jgharston wrote:(My A5000 is currently chugging its way through creating a source listing of what I'm tentatively calling 3.0 as the only version string in it is "MOSB.3".)
Oooh - what's your weapon of choice for disassembly? (Apols if you've answered this millions of times already ;)
by sdsolle
Sat Jul 19, 2014 1:11 pm
Forum: hardware
Topic: Advice on connecting up the EuroBeeb
Replies: 61
Views: 4231

Re: Advice on connecting up the EuroBeeb

I've also noticed that the PALs on your board are I/O2 and M4, whereas the PALs on Lee's are I/O2 and M5. The I/O PAL determines where devices are in &FExx, the Mx PAL determines the memory map in the rest of memory. This suggests that the memory map might be slightly different, such as &Dxxx being...
by sdsolle
Fri Jul 18, 2014 12:56 pm
Forum: software: other
Topic: make beeb memory bigger ??
Replies: 16
Views: 1898

Re: make beeb memory bigger ??

Is there anything (apart from having to write wodges of code) stopping you adding an entire extra 64K of RAM with the same memory map as a 6502 co-processor? Assuming sufficient determination and time, almost certainly. Is it worth the effort? No. Oh, nowadays, probably not - but it seems a bit odd...
by sdsolle
Thu Jul 17, 2014 10:59 pm
Forum: software: other
Topic: make beeb memory bigger ??
Replies: 16
Views: 1898

Re: make beeb memory bigger ??

Is there anything (apart from having to write wodges of code) stopping you adding an entire extra 64K of RAM with the same memory map as a 6502 co-processor? I'm imagining a mini-OS at F800 in charge of bank-switching the 'real' memory map back (to handle I/O, interrupts, etc), while tweaked Tube Ho...
by sdsolle
Thu Jul 17, 2014 7:04 pm
Forum: hardware
Topic: Userport and PC parallel port
Replies: 16
Views: 1781

Re: Userport and PC parallel port

did you never find the energy to rewind right back to the roots of UPURS and read about its evolution which was actually a migration from parallel to serial? As the man who forgot he'd made himself lunch once said: "Those who cannot remember the pasty are condemned to reheat it" A thread that's so ...
by sdsolle
Thu Jul 17, 2014 1:28 am
Forum: hardware
Topic: Userport and PC parallel port
Replies: 16
Views: 1781

Re: Userport and PC parallel port

You might want to have a look at FTDI's USB 8-bit FIFO: http://www.ftdichip.com/Products/ICs/FT245R.htm The drivers make it appear to the PC or Mac as a COM port (but a COM port that'll shift 300kbytes per second back and forth ;) Might even be possible to use the full 8 bits with some sneaky s/w an...
by sdsolle
Mon Jul 14, 2014 7:33 pm
Forum: for sale / freebies
Topic: Having a clear out
Replies: 312
Views: 27264

Re: Having a clear out

Hey Lee! Seriously, don't worry about it - every Beeb you restore and rehome is one more Beeb that someone's enjoying, and one less thing in a landfill somewhere. You're making a valuable contribution to our cultural heritage - and that's not even remotely meant tongue-in-cheek - would anyone bat an...
by sdsolle
Mon Jul 14, 2014 10:21 am
Forum: hardware
Topic: Control Universal EUROBEEB
Replies: 29
Views: 3132

Re: Control Universal EUROBEEB

(So, if your box is anything like the Beetle, you should be able to connect it via serial port and see a Beeb-like start up banner appear when you power it up, and if you're lucky a BASIC prompt).
by sdsolle
Mon Jul 14, 2014 10:17 am
Forum: hardware
Topic: Control Universal EUROBEEB
Replies: 29
Views: 3132

Re: Control Universal EUROBEEB

Interestingly there's a pair of ROMs on JGH's site that look like a "Tube via serial" implementation for the EuroBeeb. Using this, we may be able to turn EuroBeeb into a 6502 coprocessor without worrying about not having a VDU card or keyboard. That sounds very familiar. I worked on a rival Eurocar...
by sdsolle
Sun Jul 13, 2014 1:59 pm
Forum: hardware
Topic: Let's have 'LS' of that, please!
Replies: 4
Views: 1050

Re: Let's have 'LS' of that, please!

Hi Mark - After (the other) Mark mentioned the output current sink, it occurred to me that my B+ had a socked 7438, so I whipped that out and dropped it in the B's IC80 last night. Bingo! Any drives I connected to the Beeb would now step. So it seems - for my two flavours of 5¼ floppy at least - tha...
by sdsolle
Sun Jul 13, 2014 12:37 pm
Forum: hardware
Topic: 8k ROMs in the BBC B+'s 12k of sideways RAM
Replies: 1
Views: 582

8k ROMs in the BBC B+'s 12k of sideways RAM

Hello! According to … http://mdfs.net/Docs/Comp/BBC/SROM/Mastering/Module01 BBC Telesoftware has broadcast a program that uses this technique to allow BBC B+ 64K computer users to load and run 8K service ROMs in this area of paged memory. Does anyone have a copy of this program, or know what it was ...
by sdsolle
Sat Jul 12, 2014 6:09 pm
Forum: hardware
Topic: Let's have 'LS' of that, please!
Replies: 4
Views: 1050

Re: Let's have 'LS' of that, please!

The biggest difference between the two chips (for this application) is the output sink current. Ahhhh, duh, of course! Thank you - that makes much more sense. I was scratching my head wondering whether it was something clever like the slower chip being chosen to stretch the head step time pulse ;) ...
by sdsolle
Sat Jul 12, 2014 2:14 pm
Forum: hardware
Topic: Let's have 'LS' of that, please!
Replies: 4
Views: 1050

Let's have 'LS' of that, please!

Afternoon! Resurrecting an old issue 7 Beeb which looks as though it once had a 1770 daughterboard - I've replaced the telltale wire link in IC86 with a 74LS393 and dropped in an 8271. BUT! How bizarre is this: http://solle.net/images/stardot/74LS38.JPG IC 79 and 80 should both be 7438, but they're ...
by sdsolle
Tue Jul 08, 2014 5:11 pm
Forum: software
Topic: Compression
Replies: 3
Views: 1250

Re: Compression

daveejhitchins wrote:While were talking about Computer Concepts O:) Does anyone know if their contact links are still valid and monitored? Before I try and contact them
Normally, I believe so. Right now, it looks like someone's unplugged it to do the hoovering …

Edit - I've let Kate know ;)
by sdsolle
Tue Jul 08, 2014 2:19 am
Forum: wanted
Topic: Looking for just a Beeb B case......
Replies: 10
Views: 1551

Re: Looking for just a Beeb B case......

Of course with a water-cut, unibody aluminium BBC case, you wouldn't need the injection moulds …

;)

Sean.
by sdsolle
Mon Jul 07, 2014 11:38 pm
Forum: wanted
Topic: Looking for just a Beeb B case......
Replies: 10
Views: 1551

Re: Looking for just a Beeb B case......

Before I pressed send, I realised that Allen probably still has some Copyright or patent on that case design so would probably be unhelpful :D I didn't send it! Would that be a problem though? Presumably if Allen has some claim over the design (e.g. Acorn paid royalties, rather than buying it outri...
by sdsolle
Mon Jul 07, 2014 8:31 pm
Forum: wanted
Topic: Looking for just a Beeb B case......
Replies: 10
Views: 1551

Re: Looking for just a Beeb B case......

leenew wrote:^^sdsolle - Dunno :lol: but I would love to know.....
:)

I know Allen Boothroyd designed the Beeb case, but do we know who actually manufactured it? They might still be trading!

Cheers,

Sean.

Edit: Gah. You'd think by now I'd know how to spell 'Allen'.
by sdsolle
Mon Jul 07, 2014 6:14 pm
Forum: wanted
Topic: Looking for just a Beeb B case......
Replies: 10
Views: 1551

Re: Looking for just a Beeb B case......

Can't help you with a case, Ed, but your question did make me wonder …

What happened to the Beeb's injection-moulding moulds?
by sdsolle
Mon Jul 07, 2014 1:09 am
Forum: emulators
Topic: Can any Acorn emulators save UEF cassette images?
Replies: 4
Views: 1878

Re: Can any Acorn emulators save UEF cassette images?

TomWalker wrote:ElectrEm used to be able to - I'm not sure if it was implemented in Future though.
:( Doesn't look like it :(

http://electrem.emuunlim.com/Changelog.html

Thanks for the suggestion though :)

Sean
by sdsolle
Sat Jul 05, 2014 6:27 pm
Forum: emulators
Topic: Can any Acorn emulators save UEF cassette images?
Replies: 4
Views: 1878

Can any Acorn emulators save UEF cassette images?

Afternoon all! Several emulators of Acorn machines support UEF natively, to read and write tape data (at original speed or faster) and store state snapshots. Examples include ElectrEm, BeebEm and B-Em. https://en.wikipedia.org/wiki/Unified_Emulator_Format#Applications Is this true? Are there really ...