Search found 3628 matches

by daveejhitchins
Fri Oct 06, 2017 8:20 pm
Forum: hardware
Topic: Electron Plus 1 (or Master 128) Cartridge Sockets
Replies: 25
Views: 1489

Re: Electron Plus 1 (or Master 128) Cartridge Sockets

and it looks like the slots are *slightly* narrower than those on the Electron. The main difference between the Master Cartridge socket and the Electron one is: The Master socket is solid plastic containing the contacts - The Electron one has 'end' caps which can move slightly and invariably do! I'...
by daveejhitchins
Fri Oct 06, 2017 8:15 pm
Forum: hardware
Topic: Acorn 3000 4mb Ram Expansion
Replies: 43
Views: 1016

Re: Acorn 3000 4mb Ram Expansion

pictor wrote:Do you have any of the 4Mb upgrades left please?
Yes I have . . . I should have the testing problem sorted out within the fortnight - Please be patient folk . . .

Dave H :D
by daveejhitchins
Wed Oct 04, 2017 7:31 am
Forum: software: other
Topic: BBC Master Cartridges
Replies: 21
Views: 2059

Re: BBC Master Cartridges

I use Low Profile IC sockets in my cartridge projects - User choice when ordering! This allows EPROMs to be fitted.

I'm now working on a 3D printed case for all my cartridge boards :D

Dave H :D
by daveejhitchins
Mon Oct 02, 2017 8:35 pm
Forum: introduce yourself
Topic: Just re-bought my 1st Acorn Atom
Replies: 10
Views: 263

Re: Just re-bought my 1st Acorn Atom

Welcome to the Forum, Fraser . . . Enjoy . . .

And well done with your Atom =D>

Dave H :D
by daveejhitchins
Sun Oct 01, 2017 9:15 pm
Forum: introduce yourself
Topic: Hi
Replies: 14
Views: 238

Re: Hi

Welcome to the Forum, Richard . . . Enjoy . . .

Dave H :D
by daveejhitchins
Sun Oct 01, 2017 7:19 am
Forum: hardware
Topic: Baildon Electronics IDE Interfaces - Replication
Replies: 93
Views: 5299

Re: Baildon Electronics IDE Interfaces - Replication

It's getting nearer to a full time project . . . PCB to finish and, more importantly, PLDs to reverse engineer . . .

Dave H :D
by daveejhitchins
Sun Oct 01, 2017 7:07 am
Forum: hardware
Topic: Electron - Memory Detection Issues with the AP6
Replies: 8
Views: 226

Re: Electron - Memory Detection Issues with the AP6

My feeling is that's a bit drastic, and might possibly have unforeseen consequences (who knows what existing code might rely on the default behaviour). The MOS Tube detection code, for example. Not really . . . We know exactly what the Tube is looking for, so that wouldn't be an issue. However, for...
by daveejhitchins
Sun Oct 01, 2017 6:53 am
Forum: hardware
Topic: USB Electron Cartridge Interface
Replies: 27
Views: 1526

Re: USB Electron Cartridge Interface

8bitkick wrote:One idea crossed my mind - get down to Vintage Computer Festival West next year with Acorn machines and represent!
Oh yes . . . You've just got to go when they're saying this:
VCFW Says wrote:Don’t forget — CHM is the world’s best computer museum . . .
and check-out if they have the full Acorn kit! :roll:

If you need anything (?) I'm sure we should be able to assist, somehow!

Dave H :D
by daveejhitchins
Sun Oct 01, 2017 6:39 am
Forum: introduce yourself
Topic: Hello from W Yorks
Replies: 8
Views: 177

Re: Hello from W Yorks

Welcome to the Forum, ajw99uk . . . Enjoy . . .

Good to see another Yorkshire man (?) especially with a A540 - not many of those around . . .

Dave H :D
by daveejhitchins
Sun Oct 01, 2017 6:32 am
Forum: hardware
Topic: Electron - Memory Detection Issues with the AP6
Replies: 8
Views: 226

Electron - Memory Detection Issues with the AP6

This discussion arose during the BeebSCSI issue with production New AP5 thread. The first quote comes from this post . Moved here as it's a separate issue. Mark I think the root cause of this confusion is that when no serial port is present, a read of &FC65 returns &FC (i.e. the high byte of...
by daveejhitchins
Sat Sep 30, 2017 6:00 am
Forum: hardware
Topic: 27513 and Master ROM cartridge
Replies: 15
Views: 347

Re: 27513 and Master ROM cartridge

Interestingly, I've just found a flyer on 4corn for the ACP advanced ROM Adaptor II, which also cited "support for 27513 and 27011 devices (when used with the correct software) for which we are currently developing new products ". Wonder if they ever came up with "the correct softwar...
by daveejhitchins
Fri Sep 29, 2017 7:31 am
Forum: hardware
Topic: 27513 and Master ROM cartridge
Replies: 15
Views: 347

Re: 27513 and Master ROM cartridge

It does indeed look a lot like four paged 27128s. The way you select one of the four banks is simplicity itself: you just write to any address in the EPROM. Bottom two bits of the value you write are the page number. Beware! Some ROMs and maybe the OS write to each available sideways bank checking ...
by daveejhitchins
Wed Sep 27, 2017 9:54 pm
Forum: hardware
Topic: A5000 Memory Upgrade
Replies: 9
Views: 250

Re: A5000 Memory Upgrade

danielj wrote:*shakes fist at sky* -
Assuming a source of MEMC1As, would a 4-8MB be particularly hard to work out?
Ah! The point here is that no work, other than to find the memory, would be needed e.g. stock of PCBs available!

Dave H :D
by daveejhitchins
Wed Sep 27, 2017 12:36 pm
Forum: hardware
Topic: A5000 Memory Upgrade
Replies: 9
Views: 250

Re: A5000 Memory Upgrade

Sorry, I should have said: 2-4MB

Dave H :D
by daveejhitchins
Wed Sep 27, 2017 11:08 am
Forum: hardware
Topic: A5000 Memory Upgrade
Replies: 9
Views: 250

A5000 Memory Upgrade

Would there be anyone interested in A5000 Memory upgrades to 4MB?

Dave H :D
by daveejhitchins
Wed Sep 27, 2017 9:04 am
Forum: hardware
Topic: Acorn 3000 4mb Ram Expansion
Replies: 43
Views: 1016

Re: Acorn 3000 4mb Ram Expansion

OK, re the problems I'm having with 4Mb Memory upgrades not working :oops: I have a solution which should solve this problem. I'm away for a week from this Friday (29-09-17), so will sort everyone out when I get back. I 'may' also have a solution for other machines in the Archimedes range [-o< Dave ...
by daveejhitchins
Wed Sep 27, 2017 8:15 am
Forum: projects
Topic: Roguelike for the beeb. In BASIC.
Replies: 23
Views: 671

Re: Roguelike for the beeb. In BASIC.

I had similar problems to Simone e.g. No Room Error, when writing the MGC Menu. I chose to use BeebEM, on my MacBook, as I could do that anywhere - even in the caravan :D Shadow Mode, Mode 0 and ABE (Advanced BASIC Editor) along with the ABEs in-built Utilities gives me a good working environment. A...
by daveejhitchins
Tue Sep 26, 2017 7:43 am
Forum: hardware
Topic: USB Electron Cartridge Interface
Replies: 27
Views: 1526

Re: USB Electron Cartridge Interface

daveejhitchins wrote:If anyone would like a board, please pm me.
^^^ Just a reminder.

Thanks Phil . . .

Dave H :D
by daveejhitchins
Tue Sep 26, 2017 7:24 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

If you wish to stay at the hotel, the prices I've been quoted are £55 for the Friday night, £75 for the Saturday night or £125 for both nights. Rooms can be booked direct with the hotel on 01530 245454. PLEASE CHECK WITH THE HOTEL as prices may have changed since I last enquired. If/when you do boo...
by daveejhitchins
Mon Sep 25, 2017 8:29 am
Forum: for sale / freebies
Topic: ELECTRON User Port & ROM/RAM Board with UPURS - NOW AVAILABLE
Replies: 109
Views: 4423

Re: ELECTRON User Port & ROM/RAM Board with UPURS - NOW AVAILABLE

uniforix wrote:Awesome Mega Games cart though Dave, been loving mine since it arrived friday ;-)
Many thanks . . .

Dave H :D
by daveejhitchins
Mon Sep 25, 2017 7:29 am
Forum: introduce yourself
Topic: Hi
Replies: 9
Views: 205

Re: Hi

Welcome to the Forum, RudolfXC . . . Hope you stay around once you've got everything working!

Dave H :D
by daveejhitchins
Mon Sep 25, 2017 7:27 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

I know where the boards are, I think I know where the oscillators are, it's the stash of 140 new ACT153's and passives that seem to be MIA. :lol: I know the feeling! After my storage phase, while the Garage was converted into my lovely new workshop, and Mrs H being so kind as to 'tidy-up' for me :s...
by daveejhitchins
Sun Sep 24, 2017 4:09 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Oh! Forgot to mention: I'll be there Friday to Sunday - Paid-up and Booked-up.

sixxdog_uk wrote:Sunday 19th: 7am - 10pm (not that I expect anybody to stay that late!)
Oh! I can be there until 10. After all we've paid for it :-

Dave H :D
by daveejhitchins
Sun Sep 24, 2017 4:03 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 52
Views: 1666

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

EDIT: I doubt I'll be bringing any kit unless it's small and fits in my bag. Getting around on crutches means I can't easily move my kit around any more :( Hey . . . That's what we're for :D - If you do need things loading, at your end just let me know - If need be I can collect and drop you off - ...
by daveejhitchins
Sat Sep 23, 2017 9:02 pm
Forum: wanted
Topic: German? Electron
Replies: 4
Views: 180

Re: German? Electron

tomlinson wrote:Hi, I'm looking for an Electron with the metal internal lining... I think it's a German version???

Does anybody have one that they would be happy to part with?
Only ever seen photos :?

Dave H :D
by daveejhitchins
Sat Sep 23, 2017 8:59 pm
Forum: hardware
Topic: Challenge of the month - Troubleshooting?
Replies: 18
Views: 471

Re: Challenge of the month - Troubleshooting?

adrm wrote:Would there be any chance of you recording a video on your desoldering and removal work?
OK, I'll pop the videos on YouTube - It seems I have a subscriber already - My MGC add. linked from the MGC on eBay :shock: \:D/

Dave H :D
by daveejhitchins
Sat Sep 23, 2017 6:56 pm
Forum: hardware
Topic: Challenge of the month - Troubleshooting?
Replies: 18
Views: 471

Re: Challenge of the month - Troubleshooting?

DutchAcorn wrote:Yea, get rid of the bird shit next to IC72. :D
Hmmm! Does look a little nasty.

Is there a Bill of Materials for the Beeb? That would certainly help.

Dave H :D
by daveejhitchins
Fri Sep 22, 2017 7:13 pm
Forum: hardware
Topic: Challenge of the month - Troubleshooting?
Replies: 18
Views: 471

Re: Challenge of the month - Troubleshooting?

OK, here's a photo of the patient . . . I won't be working on it 'full-time' - so I'll post here when I get some work done. I think the first job I'll do is to remove all the ICs and IC sockets. Clean the board and fit all new IC sockets. I'll also be checking for any damage. Dave H :D IMG_2051.jpg ...
by daveejhitchins
Thu Sep 21, 2017 9:50 pm
Forum: hardware
Topic: Testing RAM for a 4Mb A3000 Upgrade
Replies: 3
Views: 140

Re: Testing RAM for a 4Mb A3000 Upgrade

Some DRAM chips can automatically refresh themselves. You will need to read the relevant data sheet... Yes they do . . . I used some of the first commercially available pseudo static RAM when I built a memory card for my Elf 1802 computer - it must have been back in the late 70s :shock: I've still ...
by daveejhitchins
Thu Sep 21, 2017 9:45 pm
Forum: hardware
Topic: Advanced Quarter Megabyte RAM - Preliminary
Replies: 9
Views: 1036

Re: Advanced Quarter Megabyte RAM - Preliminary

Hmmm! Just picked this thread again :-k Either I was on-something in 2013 or all the attachments have been screwed! I start off here talking about the AQR but all but one of the attachments I've posted are to do with the ABR :shock: So to pick-up the thread, here are some photo of the AQR . Kindly t...

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