Search found 6551 matches

by danielj
Wed Jan 16, 2019 12:32 pm
Forum: hardware
Topic: Is this normal for a Datacentre?
Replies: 3
Views: 147

Re: Is this normal for a Datacentre?

Ditto - my DC seems to get leakage too.

d.
by danielj
Tue Jan 15, 2019 10:18 pm
Forum: hardware
Topic: Preemptive maintenance
Replies: 12
Views: 255

Re: Preemptive maintenance

Although the ram does go, the 6522s are notoriously unreliable! Try swapping them over? That'll give you a bit of an indication...

d.
by danielj
Tue Jan 15, 2019 7:18 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2724
Views: 236295

Re: Worth Taking a Look At

Battery is under the HDD and you can't see it :? - I'd not touch that personally!

d.
by danielj
Tue Jan 15, 2019 11:57 am
Forum: introduce yourself
Topic: Hello from the UK :o)
Replies: 8
Views: 164

Re: Hello from the UK :o)

Hello! And welcome! :) Unfortunately you won't be able to use a USB floppy to get the game off that disc - they only read PC format floppies. You either need an old PC with a built in floppy drive, and the omniflop software, or else something like a kryoflux. Chances are that there's some copy prote...
by danielj
Mon Jan 14, 2019 3:35 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Excellent - so, I'm fairly confident that my master's actually fine now, but I'm pleased this turned out to be quite interesting in a completely nerdy kinda fashion! :D
by danielj
Mon Jan 14, 2019 12:08 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Do you see that hang even if adfs is the chosen filing system?

I'll try the other tests this evening!

d.
by danielj
Mon Jan 14, 2019 11:30 am
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

See what happens in different modes - as the master retains the current mode on soft break. As I said, 7 or 135 is fine, it just barfs in other modes (so I'm not necessarily thinking it's memory that's at fault here...) The only other thing I have in there is a NuLA which is on the same data bus as ...
by danielj
Sun Jan 13, 2019 10:13 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Have you got an UPURS rom handy to pop in Daniel? (or even the disc-based utility versions?) If you repeatedly perform UPXROM ? you should get consistent SWR bank results each time. Just a thought if it helps.... :) I'll have a look at this tomorrow, thanks Martin :D I'm sure I've got it knocking a...
by danielj
Sun Jan 13, 2019 9:16 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

For completeness - OK, so it generally finds banks 4, 5 and 6, but it's sometimes finding 0, 1 and 3 instead of 7... Usually 1 if it's getting the wrong one...

d.
by danielj
Sun Jan 13, 2019 8:42 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Well! There's a thing. Thanks Dave :) - extra brains are fab. It was fine with the FS's unplugged. I then realised that ANFS was in there and I'd obviously taken the econet module out whilst I was testing... ANFS was the guilty party on this one - once I'd re-inserted the filing system ROMs and plug...
by danielj
Sun Jan 13, 2019 8:31 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

good plan. One mo! :)

d.
by danielj
Sun Jan 13, 2019 7:57 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Links are correct, it was behaving fine yesterday, just today it seems to have gone odd. I'm convinced this mode 7/135 being fine on soft reset, but if you're in another mode it hangs on soft reset before displaying the Filing System Banner (properly hung, caps lock does nowt) thing points at what's...
by danielj
Sun Jan 13, 2019 7:28 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

OK - I'll have a look and see what I've got in the tank to have a go at this. I think at this stage I'm just going to resort to rather a lot of clips or see if I can jerry-rig something with a 40pin IC socket...
by danielj
Sun Jan 13, 2019 7:14 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

I can MacOS on a laptop, I can probably reach from the pc with linux either in a VM or using the Windows Linux Subsystem (ubuntu)? I suspect I'll need a test clip too...

d.
by danielj
Sun Jan 13, 2019 7:00 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

I do! - Is there a potted "how to hook it up" guide?

d.
by danielj
Sun Jan 13, 2019 6:42 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Free from bits it still behaves the same way :( The next step is to start desoldering things :'( Is there a disassembly of MOS 3.2? I'd like to work out what it's doing on soft break as that should point at where the issue lies... I'm sure I saw one somewhere but can't for the life of me find it... d.
by danielj
Sun Jan 13, 2019 5:39 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

Re: BBC Master grumpy sideways RAM detection

Actually, it's nothing to do with the coprocessor, any mode other than 7/135 just hangs after the OS processor banner on break...
by danielj
Sun Jan 13, 2019 4:54 pm
Forum: hardware
Topic: BBC Master grumpy sideways RAM detection
Replies: 39
Views: 469

BBC Master grumpy sideways RAM detection

My master's suddenly got grumpy detecting sideways RAM using the routines in the new bitshifter's demo - it seems to get the banks with the lower sideways ram wrong more often than not... This would seem to suggest that the ROMSEL register's misbehaving? Am I right in thinking this is in the MEM CON...
by danielj
Sun Jan 13, 2019 8:00 am
Forum: acorn atom and system
Topic: Acorn System 1 TinyCAD and VeeCAD
Replies: 13
Views: 305

Re: Acorn System 1 TinyCAD and VeeCAD

Kicad is really the go-to open source cad/pcb package. Bit of a learning curve but it's very good. Even used (and developed) by Cern!

Ive used it for a fair few pcbs, and Simon Inns has done a lot with it including the latest beebscsi and the domesday duplicator.
by danielj
Sun Jan 06, 2019 7:50 pm
Forum: hardware
Topic: Keyboard Mat - Model B
Replies: 1
Views: 129

Re: Keyboard Mat - Model B

Someone was considering cutting some (that wouldn't have the lettering on them), but there have never been any new ones made and made available as far as I know.

d.
by danielj
Sun Jan 06, 2019 6:31 pm
Forum: software
Topic: Disc errors with adffs?
Replies: 20
Views: 626

Re: Disc errors with adffs?

This is the version I'm using, and it's fine with the HD disc controller: https://www.4corn.co.uk/articles/acornc5/

d.
by danielj
Sat Jan 05, 2019 11:02 pm
Forum: software
Topic: Disc errors with adffs?
Replies: 20
Views: 626

Re: Disc errors with adffs?

Hmm, I installed the final 26bit release from 4corn on my a5000 via a gotek and that worked fine... Mind you, that version is OK on a riscpc too...
by danielj
Fri Jan 04, 2019 9:18 am
Forum: off-topic
Topic: Solder/flux recommendations
Replies: 10
Views: 256

Re: Solder/flux recommendations

Arc would have been leaded. CPC sell multicore 60-40 still, that's what I've found to be the best? I have a US brand too which doesn't wet as well... I use no-clean liquid flux from CPC too:https://cpc.farnell.com/warton/315-0-5l-bottle/315-noclean-flux-1-2-litre/dp/SD00085 This is all for surface m...
by danielj
Thu Jan 03, 2019 7:33 pm
Forum: general
Topic: Date of last (final) use of BBC Micros in classrooms?
Replies: 16
Views: 414

Re: Date of last (final) use of BBC Micros in classrooms?

Actually, that reminds me, I nobbled a master which had just been retired from use when I was doing teacher training in 1998!
by danielj
Thu Jan 03, 2019 4:05 pm
Forum: general
Topic: Date of last (final) use of BBC Micros in classrooms?
Replies: 16
Views: 414

Re: Date of last (final) use of BBC Micros in classrooms?

Used all the way up until I left in 1992 at my old school. Finally bought it in 1994 iirc when the entire network got taken out by a thunderstorm. All replaced with PCs at that point...

d.
by danielj
Wed Jan 02, 2019 9:33 pm
Forum: emulators
Topic: Borrow a beeb in the Bay Area?
Replies: 6
Views: 311

Re: Borrow a beeb in the Bay Area?

If you've got a Master, you've no need for a compact :D

d.
by danielj
Mon Dec 31, 2018 7:49 am
Forum: archive issues
Topic: Retro Software website down
Replies: 31
Views: 1055

Re: Retro Software website down

The forum is basically defunct and no longer used. It should probably be removed?

d.
by danielj
Sun Dec 30, 2018 6:31 am
Forum: hardware
Topic: Old Master
Replies: 2
Views: 236

Re: Old Master

6522s are generally awful in anything :D

The one with the messed up screen, try holding the cmos reset when you turn it on (R).

d.
by danielj
Tue Dec 25, 2018 8:04 pm
Forum: wanted
Topic: Acorn A3000 ARM 3
Replies: 23
Views: 604

Re: Acorn A3000 ARM 3

Hello, welcome to the forum.

If no one's got one knocking about, I'd be fairly confident that CJE will:
http://www.cjemicros.co.uk/micros/indiv ... ARM3A3K-SH

You'd have to have a conversation with them though to see which varieties they actually have?

d.
by danielj
Sat Dec 22, 2018 2:19 pm
Forum: hardware
Topic: Over-etched pads
Replies: 8
Views: 191

Re: Over-etched pads

Does it work? If so, I'd just leave it. The only real way to repair gold plating is to re-plate it electrolytically. Some of the solutions to do that aren't particularly nice (you'd need to wear a respirator), but all the gear is certainly going to cost more than £50...