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Could you repeat but load a different image into each slot so that the two slots aren’t the same. Include the second Elk confirmation before moving to a Master. Yup! Tried that - I've actually been trying different 'ideas' for the last two days - and repeating the same tests over and over. As time ...

What makes you sure that both images have been loaded on the Elk in the first place? Your video shows the program asking to load the ABR and then showing slots 2 & 3 with the ABR utils but do you actually check off-video that each has the image physically loaded? I’m guessing that one of the two sl...

More testing has revealed a possible faulty Master. Need to do some more testing tomorrow morning. For the first hour or so of use I'm getting some strange results (see images and attached videos). Then it starts to behave. So I've been fighting these faults and no faults trying to get an EEPROM bas...

Prime wrote: ↑

Tue Aug 14, 2018 9:48 am

Did you mean Argos?

Brain typo . . .

Dave H

Just to let people know: Aldi have a special-buy of a Juice brand 5000mA power bank for sale, from last Sunday, for £12.95 - half the price they are in Argus . . . Dave H

MartinB wrote: ↑

Mon Aug 13, 2018 8:36 pm

On your last ‘issue’, I shall await further info because I haven’t a clue what you’re on about....

I feel a few videos are needed - just in case my imagination has gone astray . . .

Dave H

Hi, Martin or is that the invisible man :wink: I've been using your EEPROM utilities a lot, over the last few days, during the testing of the ABR with a 28C256 fitted, not all the features but enough. The following are not criticisms but observations: If I follow your instructions to the letter - th...

You've a problem with IC58 (leg missing or not soldered) and IC55 that still has blue corrosion on the socket pins. You need to treat the whole area with white vinegar, using a small brush (an old toothbrush works well!). Remove any socketed components first . . . Leave the vinegar on for about 10mi...

Elminster wrote: ↑

Sun Aug 12, 2018 9:22 pm

I most have something that programs PAL somewhere, is there a link to the instructions on programming it or just the code?

I'll add the JED file for a GAL16V8

Dave H

I've now fixed the PLD so this mod will now work for an ABR fitted into a Master.

Note: The PLD will need to be updated first, see this post for details. If you don't have programming facilities for PLDs, either return the PLD or ABR to me and I'll reprogram it for you.

Dave H

Welcome to the Forum, lambdamikel . . . Enjoy . . .

Dave H

Sounds like the exact process needed for my B modules... including persuading Martin to add support [-o< That would be similar to my AP7 ap7a.jpg ap7b.jpg An ABR for an IC socket - Shown here in an Electron AP6 but you could change the links and it was supplied with leads to fit into a Beeb. A bit ...

For completeness, here are the Electron nCS, nOE and R/nW signals for a write and read cycle: abr_elk1.jpg abr_elk2.jpg abr_elk3.jpg And here is the PLD code: Name ABR-Issue3 ; PartNo 16L8 ; Date 12/08/2018 ; Revision 03 ; Designer D.E.J. Hitchins ; Company Retro Hardware ; Assembly Advanced Battery...

Having the software controlled LOCK and UNLOCK means you don't need a physical write-protect switch - bonus :mrgreen: Does this chip return inverse/toggling bytes for a short while after an attempted write even if locked like the Greenliant chips do? That's a problem I had with the chips I used & D...

Update . . . Instigated the nCS controlled write sequence which seems to have fixed the problem. As in the first post: Top trace down = T2, nCS, Noe and R/nW abr21.jpg abr22.jpg abr23.jpg Testing on the Master, with MartinB's utilities, has gone well. The only thing you have to remember is to use th...

I’m on hols Dave as you know but quickly, I didn’t ever get my eeprom stuff working in a Master internal socket but everything was fine in a cartridge. That’s probably no help whatsoever but just thought I’d mention it...😜 Thanks, Martin . . . I think Steve must have, as I'm sure one or more of his...

When I converted my garage to workshop I used the standard loft boarding for the loft floor, Workshop ceiling and walls - with insulation between. I've not any problems with the loft flooring - lots of 'stuff' stored on it

Dave H

This thread was for the Electron - which turned out to be easy e.g. just removing the battery and replacing the SRAM with the 28C256 Flash/EEPROM worked. The ABR for the Master seems to be causing me problems :? First I tried exactly what I did for the Electron - Master wouldn't even start-up. Hmmm...

philb wrote: ↑

Sat Aug 11, 2018 8:41 am

Awesome, thanks. No rush, I'll be on holiday in darkest Yorkshire for the next couple of weeks anyway.

Darn . . . No Christmas card for you then

Dave H

Welcome to the Forum, Tris . . . Enjoy . . .

Dave H

danielj wrote: ↑

Thu Aug 09, 2018 7:55 am

Finished version:

Looking Great

Dave H )

hoglet wrote: ↑

Thu Aug 09, 2018 9:43 am

The final accounts say I made a profit of £13.61

Wow! . . . That's £1.36/unit - I've just got to get a viewing of your business plan, Dave - it seems to be far better than mine

Dave H

Hmmmm! . . . Col, try using BeebSCSI with DFS

Dave H

Hmmm! I was side-tracked today trying to fathom out why I can't get an ABR with a 28C256 fitted to work in a Master! Works fine in an Electron. But all this is for another thread. Back on track . . . One thing I want to check, tomorrow, is: - Is the OS any different e.g. in none Turbo mode? Dave H :D

I noticed that both non-working ULAs have totally different sockets for the same chip. Lack of parts on later Elks? Yes, I've seen three different types of ULA socket on Electrons. Two of them are remarkably resilient with the other prone to pin snapping - fortunately repairable! The Electron servi...

I and others have noticed a problem with running some hardware with Prime's MRB. Note: There's lots of testing still to do and the problem may not be the MRB, however, testing so far (see below) does indicate this . . . The problem I'm seeing is with disc access: ADFS with Acorn's Plus 3 and my AP3 ...

Welcome to the Forum, Chris . . . Enjoy . . .

Dave H

Darn . . . Too late - I have some floppy extenders! I'll dig them out if anyone does want one(?)

Dave H

Welcome to the Forum, bailey . . . Enjoy . . .

Dave H

p.s. Don't stop the rambling

B-em runs on more recent mac os :) Personally I don't think the compiling is very far down the techy-route (I perhaps unfairly think if you're using unsupported free software you should be prepared to get your hands a bit dirty here and there). Perhaps someone will work out how to package it nicely...