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The way I recommend, for this issue, is to fit an in-line power switch, close to the Electron, and simply do a power cycle after any game - Instant fix. Quicker that anything you can type!

Dave H.

My unit doesn't like Ctrl/Brk - it immediately fails and doesn't recover without a power cycle - This may be by design! I have been wondering how you would 'latch' a fault. I'll have to study the circuit in more details when I have the TC. Also get the 'scope on it.

Dave H.

Aaaaaaaaaaaaaaarrrrrrrrr! What idiot at JLCPCB thought this was correct? IMG_0968.jpg I'm just about to have a cup of tea and a biscuit so I have chance to calm down . . . I've had thousands of PCBs made with exactly the same DRAWING details, even from JLBPCB, and they've not used the Dimensional D...

rharper wrote: ↑

Thu Oct 29, 2020 12:06 pm

Hi Dave,
Is it possible to modify the first AP5 so that it has a 5v output?
Ray

Yes . . . I'll see if I can get you a photo.

Dave H.

So we any idea what it does, does it short anything or send anything to elk to make it carry out the soak test? It only monitors the Electron, it in no way that I can see controls or triggers the machine so I can't see it doing any harm in plugging it in and seeing what happens. I'm curious what pl...

Are the ULAs interchangeable (they appear to be), or would I be better to swap them back? I've not had any problems using any ULAs in any issue boards - so I'm sure you're OK to leave them as-is. (the issue 2 ULA socket is a bit tricky to move, as the pins never line up easily) The ULA sockets are ...

One of the Forum members wanted a Slogger Switched Joystick Interface - so I made up 5* to get a semi decent price. * I can make more, if needed . . . I've been testing these out. They should work with the tape software that Bud supplies with their interface, as it (can) uses the same address (&FC00...

hoglet wrote: ↑

Thu Oct 29, 2020 11:26 am

I've also switched over to an Issue 2 motherboard (this time with the blobby ULA) and it's still fine.

A blobby ULA in an issue 2 board Where are you getting your Electrons from?

Dave H.

If you have: Phill's MRB, Electron, Plus 1 and Disc interface. PLEASE Format a disc and let me know if you see this error . . . Thanks I don't seem to be able to reproduce this issue. capture25.png The hardware is: - Electron Issue 6 Motherboard - Ferranti ULA (not sure why I've ended up with this ...

I can test with this setup Dave: Prime MRB + Plus 1 + Plus 3 + PRES ADFS v3.31 ... but if I remember correctly, that variant of ADFS never writes ZYSYSHELP at all, because it doesn't have the bug that was in ADFS 1.00. Thanks . . . Could you just try the procedure in the last photo - It seems it's ...

Love it when a plan comes together . . . Even if it's a bit late

Dave H.

Marvin wrote: ↑

Thu Oct 29, 2020 12:23 am

I think I'm right but honestly I'm going cross-eyed looking at this with all the mistakes on it, honestly how could Acorn mess up a simple board so much?

I agree - Myself and othe Forum members - well - I just can't remember seeing any foul ups!

Dave H.

Thanks everyone - Yup! Different decks . . .

Dave H.

A BUMP on this thread as the issue is still affecting Formatting a disc when one of Phill's (Prime) MRB is fitted. This is the issue . . . IMG_0866.jpg If you have: Phill's MRB, Electron, Plus 1 and Disc interface. PLEASE Format a disc and let me know if you see this error . . . Thanks. 1) Doesn’t a...

Welcome to the Forum, Jeremy . . . Enjoy . . .

Dave H.

C2 and C3 are decoupling capacitors, but what value are they? I can see the values of C1 and C5, but what value is C4? C1 - 10u 25V C2 - 47n C3 - 47n C4 - 1u Tant 'L' ? C5 - 47u 16V Tant. D1- OA47 So I think the resistor values are: Correct R1 220kΩ R2 1kΩ R3 not found R4 100kΩ R5 47kΩ R6 1kΩ R7 15...

Sounds excellent! Not that I'm in the first five (and I don't know how many you're planning) but I'm just checking how this connects to the board in the Plus 1... It looks like there are 4 headers: HDR 1 into IC14 — the Plus 1's 8K ROM socket HDR 2 into IC1 HDR 3 into IC6 HDR 4 into IC11 On my Plus...

5 x PCBs arriving this Friday

Dave H.

5 x Prototype PCBs arriving this Friday

Dave H.

Still awaiting those clearer pictures :D Can you please buzz out where the track from R9 goes to under the 74122 chip, I suspect pin 3. Also what's the numbers on the transistors ? I've nearly got my schematic finished but I want to be certain on a couple of things before posting it. R9 goes to pin...

Physically the ANF03 and ALF03 Acorn Tape Machines are different sizes, however, does anyone know if they have the same deck inside? I'm after a set of replacement belts to enable me to refurbish the one I use for all tape work (the ANF03). It's currently working, but . . . DataServe Retro have the ...

Will see what I can do when get another moment to open it :) Still awaiting those clearer pictures :D Can you please buzz out where the track from R9 goes to under the 74122 chip, I suspect pin 3. Also what's the numbers on the transistors ? I've nearly got my schematic finished but I want to be ce...

Now to soak my workaday Electron overnight . . . Where I am at the moment, just leaving it outside in the open will result in it getting a good soaking.... and a wash and shower at the same time... Mark Excellent theory, Mark - cheaper than the dishwasher :lol: But waiting for the sun for the dryin...

All the Electron games in my original MGC are ROMed (216 games in total). Most just occupy 1 x 16K image with some of them needing 2 x 16K. All the ROMing was kindly carried out by DavidB

It's a large file, however, if anyone would like the package, please let me know.

Dave H.

Couldn't resist

Now to soak my workaday Electron overnight . . .

Be interesting to see the schematics (save me doing it )

Dave H.

cmorley wrote: ↑

Mon Oct 26, 2020 9:19 am

C male to A female is an inexpensive passive adapter or cable.

Yes, I do have the adaptor - it's just a reliability thing for what could be be very important data!

Dave H.

So a couple of questions.... Can I plug the CF in and out while the beeb is on? To answer this question . . . It's a hard drive, so, if it's dismounted I can see no reason why you can't change it - but Note: I've not tried this - I doubt you'll damage the CF card as the power connector pin, on the ...

You don't need Ubuntu for dd on a Mac... isn't it a native command on MacOSX (being BSD based)? e.g. https://www.cyberciti.biz/faq/how-to-create-disk-image-on-mac-os-x-with-dd-command/ Ah but . . . As I'm trying to image a drive and the connection will be via USB > IDE - I'd rather do this on Windo...

So . . . It's now sorted - I have a New (opened, not used) identical hard drive in place with all the content from the old drive. Here's the story: The plan was to use FCFS imager. First I needed to try it out. I planned to Image one of my IDEFS 2GB CF cards to the second identical one (?? see below...

Excellent . . .

Dave H.