Search found 475 matches

by Boydie
Thu Oct 29, 2020 2:15 pm
Forum: general
Topic: Today I received.....
Replies: 6011
Views: 617648

Re: Today I received.....

345FE799-745A-4974-B139-3523A63C67A9.jpeg Even the fuse holder is Acorn green! When were these actually sold? I can’t find a mention in any price lists, dealer ads in magazines, or any reviews. The only mention I’ve ever found was in “The Acorn Guide to the Micro” magazine supplement. Edit: Dec ‘82...
by Boydie
Wed Oct 28, 2020 7:10 pm
Forum: 8-bit acorn emulators
Topic: Real HD images in B-Em
Replies: 9
Views: 154

Re: Real HD images in B-Em

It now works! Renaming the existing .dat file to scsi* worked fine, once I'd worked out where I then needed to put it. For some bizarre reason, it wants the scsi*.dat files in \User\*\AppData\Roaming\b-em.exe\scsi, but then creates scsi* files (no extension, should it be .dsc?) in the main B-Em\scsi...
by Boydie
Wed Oct 28, 2020 6:34 pm
Forum: 8-bit acorn emulators
Topic: Real HD images in B-Em
Replies: 9
Views: 154

Re: Real HD images in B-Em

Or you could run the file through: and then it would be suitable for use as a SCSI image and can be used with unpatched ADFS. If it is useful I could look to make the SCSI disc driver handle the IDE format files. My original intention was compatibility with BeebSCSI but it sounds like it would be u...
by Boydie
Wed Oct 28, 2020 5:14 pm
Forum: 8-bit acorn emulators
Topic: Real HD images in B-Em
Replies: 9
Views: 154

Re: Real HD images in B-Em

I *think* that's what I've been doing. I renamed ADFS0.dat to hd4.hdf, tried locating it in B-Em's folder and/or ~\AppData\Roaming\b-em.exe folder. Tried running B-Em with IDE HD selected and ADFS 1.53 loaded (or 1.50, just in case). Still no joy, whereas BeebEm with IDE HD selected and ADFS 1.53 ju...
by Boydie
Wed Oct 28, 2020 4:03 pm
Forum: 8-bit acorn emulators
Topic: Real HD images in B-Em
Replies: 9
Views: 154

Real HD images in B-Em

I have a pair of images of my CF card disc partitions - ADFS0.dat & ADFS1.dat. These read fine in ADFS Explorer, and BeebEm. In B-Em, it's a different story. Best I can get is "Broken Directory" when trying to *MOUNT them. And I'm not too sure it's really reading them, even then. How do I get them t...
by Boydie
Thu Oct 15, 2020 4:10 pm
Forum: general
Topic: Today I received.....
Replies: 6011
Views: 617648

Re: Today I received.....

If you can find out what CPC’s latest special offer code is (two more digits to go on the end of the order code, so it’s 7 characters rather than 5), it’s always worthwhile trying them on the end of anything you order from CPC - quite often what you want is also on offer but they don’t tell you on t...
by Boydie
Thu Oct 15, 2020 2:11 pm
Forum: general
Topic: Today I received.....
Replies: 6011
Views: 617648

Re: Today I received.....

I’ve got the same model. Extremely useful and usable, even in my ham-fists.
by Boydie
Sun Oct 11, 2020 8:43 am
Forum: 8-bit acorn hardware
Topic: Are Rodimes Really Rubbish?
Replies: 19
Views: 609

Re: Are Rodimes Really Rubbish?

Don’t mention The Scottish Drive!!!

‘Tis terrible bad luck. A curse on all your data!
by Boydie
Sat Oct 10, 2020 8:06 pm
Forum: 8-bit acorn emulators
Topic: Trying to compile b-em
Replies: 3
Views: 194

Re: Trying to compile b-em

Boydie, Not your fault in the case of B-Em. Some random junk (keybaord malfunction) had crept into Makefile.win. I have pushed a change to fix that. I am not sure I have ever compiled Allegro on Windows. I have downloaded release packages from the Allegro GitHub and, when I needed to patch it, cros...
by Boydie
Sat Oct 10, 2020 4:23 pm
Forum: 8-bit acorn emulators
Topic: Trying to compile b-em
Replies: 3
Views: 194

Trying to compile b-em

This is turning into quite a voyage of discovery! I'm trying to compile the lastest version of b-em-master from github, on Win10. I've downloaded and installed MinGW (all the Basic Setup), and downloaded and compiled allegro-5.2.2.0. All of which was considerably above my usual skillset, but I think...
by Boydie
Thu Oct 08, 2020 10:58 pm
Forum: general
Topic: Bad news: water damage at CCH
Replies: 6
Views: 517

Re: Bad news: water damage at CCH

But they don’t count (at least not any more)?
by Boydie
Sun Oct 04, 2020 3:42 pm
Forum: other vintage hardware, software and languages
Topic: Looking for some Z80 CPUs
Replies: 4
Views: 256

Re: Looking for some Z80 CPUs

I've got an unused Z80B (part no Z8400BB1) from 1990 or thereabouts, if that's any use.
by Boydie
Wed Sep 30, 2020 7:32 am
Forum: 8-bit acorn hardware
Topic: Ample Rom query
Replies: 36
Views: 1645

Re: Ample Rom query

Alternatively, I can always just upload my M5000 and M5000-4 Issue discs, with passcode and rom id (and rom image) when I get time! :D

Then effort can be focussed on other discs in the series.
by Boydie
Wed Sep 30, 2020 7:28 am
Forum: 8-bit acorn hardware
Topic: Ample Rom query
Replies: 36
Views: 1645

Re: Ample Rom query

108801 in Base 9 converts to &FFFA, so it just works as a 16-bit romid. Presumably, for any given release of issue disc, all the modules on the disc are pre-coded to give the same checksum, so the same passcode will mod all modules in that software release version to the same romid. It may be reason...
by Boydie
Tue Sep 29, 2020 10:06 pm
Forum: 8-bit acorn hardware
Topic: Ample Rom query
Replies: 36
Views: 1645

Re: Ample Rom query

That’d be my guess, although I can’t comment on your checksum generator. The only benefit from working out how to back-engineer the passcode from the offset would be the convenience of just putting it into the Issue disc and getting it to make all the correct modules, instead of having to create the...
by Boydie
Tue Sep 29, 2020 1:11 pm
Forum: 8-bit acorn hardware
Topic: Ample Rom query
Replies: 36
Views: 1645

Re: Ample Rom query

Both my passcodes are 5-digit numbers. I have codes for M5000 and M5000-4 issue discs, both for the same rom id. These codes are different, which is unsurprising as they will generate different checksums by default, and so will need different offsets to match the rom id. I’d guess this applies to an...
by Boydie
Mon Sep 28, 2020 9:56 pm
Forum: 8-bit acorn hardware
Topic: Ample Rom query
Replies: 36
Views: 1645

Re: Ample Rom query

Don’t know if this has been pointed out before, but the ROM ID printed on the ROM (and hence known to the user) is actually in Base 9. This explains how a >16bit number can be stored in two bytes of rom. This may, or may not, help in reverse engineering how the passcode/rom id generator works. Edit:...
by Boydie
Wed Sep 16, 2020 7:57 pm
Forum: off-topic
Topic: Game & Watch Box
Replies: 4
Views: 337

Re: Game & Watch Box

16.5 X 9.6 X 3.3 cm
by Boydie
Thu Sep 03, 2020 9:48 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 50
Views: 2831

Re: For sale: RGBtoHDMI boards

Please could you put me down for:

1 x RGBtoHDMI kit
1 x Analog board kit
by Boydie
Mon Aug 31, 2020 2:39 pm
Forum: for sale / freebies
Topic: Bare 5.25” drives - now rehomed
Replies: 2
Views: 247

Re: Bare 5.25” drives - now rehomed

Now have a new owner
by Boydie
Sat Aug 29, 2020 11:00 am
Forum: for sale / freebies
Topic: Bare 5.25” drives - now rehomed
Replies: 2
Views: 247

Bare 5.25” drives - now rehomed

Or bad home; I’m pretty indifferent.

1 x DS 80T HH, door latch needs repair. Functional status unknown
1 x DS 80T HH, last worked intermittently
1 x PC 1.2M (I think) HH. Never used

Collection only, from Wigan area.
by Boydie
Sat Aug 15, 2020 6:53 pm
Forum: off-topic
Topic: PC Memory Timing Strangeness
Replies: 11
Views: 559

Re: PC Memory Timing Strangeness

Coincidentally, I’ve been suffering random restarts on my latest project. The DDR4-3200 was overclocking to 3600 (with relaxed timings), and passing Memtest86 absolutely fine, so that couldn’t possibly be the issue, right? The rest of the system hadn’t been altered, but Intel BurnTool was no longer ...
by Boydie
Thu Aug 13, 2020 7:24 pm
Forum: for sale / freebies
Topic: FS: Econet Podule - all gone
Replies: 32
Views: 1393

Re: FS: Econet Podule

One please
by Boydie
Thu Aug 13, 2020 1:21 pm
Forum: off-topic
Topic: PC Memory Timing Strangeness
Replies: 11
Views: 559

Re: PC Memory Timing Strangeness

The IMC question was speculative on my part - if the cpu has a slightly weak/elderly integrated memory controller it may be okay for two sticks but unstable with four. Checking the forums out, this can indeed be an issue, more so if the ram is being overclocked, but also at stock. What is your cpu? ...
by Boydie
Wed Aug 12, 2020 1:24 am
Forum: off-topic
Topic: PC Memory Timing Strangeness
Replies: 11
Views: 559

Re: PC Memory Timing Strangeness

Try 24hrs Prime95 on Blend? Since you don’t know which (if any) component is flakey, Blend will test all of them. If it throws up errors, the culprit FFT size will help track down if it’s memory/cpu etc... Then try individual sticks if it looks like memory. How long did you run memtest for (and I pr...
by Boydie
Tue Aug 11, 2020 7:37 pm
Forum: off-topic
Topic: PC Memory Timing Strangeness
Replies: 11
Views: 559

Re: PC Memory Timing Strangeness

May be as well to check the voltage supplied to the memory as well. If your bios is selecting that from the new memory’s profile as well, and it’s only asking for 1.35V then the old stuff won’t be happy...
by Boydie
Sat Aug 08, 2020 8:47 am
Forum: acorn atom and acorn system series
Topic: This looks odd
Replies: 13
Views: 1011

Re: This looks odd

Just to muddy the waters slightly... Back in the early 90s, I managed to get hold of several System 3s and 8-10 Atoms that the Experimental Psychology Dept in Cambridge didn’t want any more. These were all just bog-standard machines, not custom oem jobs. I remember one of them stood out because it h...
by Boydie
Fri Aug 07, 2020 9:05 am
Forum: off-topic
Topic: Anyone else suffer from bent finger(s)?
Replies: 6
Views: 483

Re: Anyone else suffer from bent finger(s)?

Try googling “trigger finger” and “tendon nodules” to see if they match your symptoms.

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