Search found 401 matches

by philb
Fri Apr 16, 2021 11:31 pm
Forum: 8-bit acorn software: other
Topic: "Edit" Source Code
Replies: 19
Views: 716

Re: "Edit" Source Code

Ah yes, that BigStu logo looks somewhat familiar. I vaguely recall SJMON or some such being branded as "a BigStu production" as well.
by philb
Fri Apr 16, 2021 11:04 pm
Forum: wanted
Topic: WTB : A5000 keyboard
Replies: 4
Views: 35

Re: WTB : A5000 keyboard

I think all the pre-RiscPC keyboards were interchangeable, functionally if not cosmetically. I'm fairly sure I have a few at my office in various states of disrepair. If you are happy to take a filthy one that needs cleaning and possibly more, and you aren't too bothered about what it looks like, yo...
by philb
Fri Apr 16, 2021 10:53 pm
Forum: wanted
Topic: Wanted: ANFS ROM for Master 128
Replies: 10
Views: 171

Re: Wanted: ANFS ROM for Master 128

[Is the "04" significant I wonder? Maybe make an image of it in case it's an unknown variant? Yes, I will do. They all have hand-written labels that talk about "Pr. B" so they must be pre-release Master versions. Which with hindsight makes it obvious that they can't be 4.25 beca...
by philb
Fri Apr 16, 2021 8:04 pm
Forum: wanted
Topic: Wanted: ANFS ROM for Master 128
Replies: 10
Views: 171

Re: Wanted: ANFS ROM for Master 128

Sorry for the delay. Those three ROMs are "ANFS 4.18 04". I might have a 4.25 one around somewhere, or I could erase one of the 4.18s and re-blow it with 4.25. Let me have a bit of a look.
by philb
Fri Apr 16, 2021 6:56 pm
Forum: introduce yourself
Topic: Afternoon All
Replies: 9
Views: 85

Re: Afternoon All

a1exh wrote:
Fri Apr 16, 2021 6:54 pm
I always wanted one, lots of owners in the local computer club. I wanted an A3000 or A3020 but they go for ££££ so I had to settle for an A5000 which has just arrived.
That's funny, I would have thought an A5000 would be worth more. Sounds like you got a good deal there!
by philb
Fri Apr 16, 2021 4:00 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

The best copy of the schematic I have found online is http://stardot.org.uk/mirrors/www.bbcdocs.com/filebase/econet/FilestoreServiceManualv2.pdf but yes, it's rather rough. There's a guy on the Facebook group who has been redrawing some of the old schematics to make them more legible. Maybe he could...
by philb
Fri Apr 16, 2021 11:33 am
Forum: 8-bit acorn hardware
Topic: Econet widget
Replies: 4
Views: 170

Re: Econet widget

One is what appears to be a micro SD card slot. What is that for? Will this include fileserver firmware to serve files from the SD card? That was sort of the idea, yes. It doesn't cost much to have the µSD slot on there and it's nice to have at least the option. At that point it becomes just a &quo...
by philb
Fri Apr 16, 2021 9:29 am
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

The FileStore does use both the internal oscillator and the ph4 output on the 65C102. Here's a small extract from the schematic: Screenshot from 2021-04-16 09-26-40.png Of course, that's not to say it couldn't be made to work with a different CPU; if you were desperate enough you could certainly mak...
by philb
Fri Apr 16, 2021 8:41 am
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

Yes. I think my next plan is going to be to remove all the socketed ICs that connect to the data bus, and also remove the Econet module, and see if I can then get to a point where the CPU executes code reliably from ROM and the levels on the data bus look OK. I think there will be a little bit of fi...
by philb
Thu Apr 15, 2021 11:43 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

Oh, and, it turns out that the CPU in the 6502 2P is a 65C02, not a 65C102, so it won't work in the FileStore. It's possible that the CPU from a Master might be compatible, I'd have to check. But I don't currently think that my problem is actually a bad CPU anyway.
by philb
Thu Apr 15, 2021 5:26 pm
Forum: 8-bit acorn hardware
Topic: Econet widget
Replies: 4
Views: 170

Re: Econet widget

No, I carelessly didn't think of that at the time. I'm sort of hoping not to blow them up very often, and replacing a surface-mount part is at least a quicker operation than desoldering all the pins of a through-hole one, but if I do another version of the board then I will change one of the line dr...
by philb
Thu Apr 15, 2021 4:38 pm
Forum: 32-bit acorn hardware
Topic: Minipodule metalwork
Replies: 25
Views: 691

Re: Minipodule metalwork

Here's a first glimpse of the PCB, partially assembled.
2109457945042.jpg
by philb
Thu Apr 15, 2021 2:51 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

I had a look at my second unit today. It's doing much the same as the first one, no MODE light, except this one doesn't have a stuck NMI. IMG_20210415_131202.jpg I can see the processor fetching the reset vector successfully but it all seems to go off into the weeds after that. Here's a better view ...
by philb
Thu Apr 15, 2021 2:31 pm
Forum: 8-bit acorn hardware
Topic: Econet widget
Replies: 4
Views: 170

Econet widget

First power up, no smoke which is a good start! Apologies for slightly blurry photo.
IMG_20210415_121613.jpg
by philb
Wed Apr 14, 2021 7:47 pm
Forum: 32-bit acorn hardware
Topic: New owner of an Archimedes 440
Replies: 32
Views: 675

Re: New owner of an Archimedes 440

I would be interested to see the results of the test ROMs when they arrive, as the RAM test detailed here looks quite interesting. https://stardot.org.uk/forums/viewtopic.php?p=185914 I wonder if it needs any functioning RAM to work, or if it runs entirely out of the ROM. If it's outputting its res...
by philb
Tue Apr 13, 2021 6:06 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

Yes, those floppy posts are a pain. I have left mine also supported on the rear two posts and the front of the case, which seems fine as a temporary measure. If a replacement CPU doesn't help I guess my next step will be to hook it up to the logic analyzer and see if I can work out what the processo...
by philb
Tue Apr 13, 2021 1:36 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

I took one of my units into the lab this morning and had a bit of a poke at it. Clocks and reset are working, CAS and RAS to the RAMs run, but the floppy controller seems to be asserting NMI into the 65C02 continuously. Also, the high-order address bits on the CPU appear to be stuck at zero and don'...
by philb
Tue Apr 13, 2021 10:11 am
Forum: wanted
Topic: Wanted: ANFS ROM for Master 128
Replies: 10
Views: 171

Re: Wanted: ANFS ROM for Master 128

There's no version number on the label, but I can easily enough pop them in the programmer or into a computer and check the version. I will do that later today. Is there a particular version you wanted/needed? I think 4.25 was the latest.
by philb
Tue Apr 13, 2021 8:32 am
Forum: wanted
Topic: Wanted: ANFS ROM for Master 128
Replies: 10
Views: 171

Re: Wanted: ANFS ROM for Master 128

I seem to have loads of them here. ("Project B" is Master 128, right?) Send me a PM if you want one.
by philb
Mon Apr 12, 2021 3:04 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

When it does do a "test" a lot of the time it's just giving you the acceptable result value already pre-coded into the program, as I found here: Yes, I think when it says "Check IC1 pin 23..." that's supposed to be read as an instruction to the user, not a statement of what the ...
by philb
Sun Apr 11, 2021 7:35 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

sorry to hear that. Is the light static or flashing? Any noise from accessing floppies? I assume you've got the test diags disc? Yes, I downloaded the test diags disk from https://acorn.huininga.nl/pub/disks/originals/Acorn/FileStore/ No activity from the floppies or the MODE light at all. The POWE...
by philb
Sun Apr 11, 2021 6:28 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

Powered up but sadly neither unit seems to be working: fan spins, power light comes on but nothing else. I'll have to take them to the lab at work where I have proper test equipment to figure out what's wrong.
by philb
Sun Apr 11, 2021 4:44 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

Putting them back together.
IMG_20210411_163918.jpg
by philb
Sat Apr 10, 2021 10:26 pm
Forum: 8-bit acorn hardware
Topic: Finding an Acorn Winchester Hard drive
Replies: 12
Views: 428

Re: Finding an Acorn Winchester Hard drive

KenLowe wrote:
Sat Apr 10, 2021 6:28 pm
Here's a few photos of some new 5.25" cases I've had built...
Very nice. Will the metalwork also accept a 5.25" floppy mech?
by philb
Sat Apr 10, 2021 10:25 pm
Forum: introduce yourself
Topic: Hello and first question
Replies: 8
Views: 192

Re: Hello and first question

Hello :) Technically those books will all be still in copyright. I think the rule is that copyright lapses after the author has been dead for 70 years, and clearly that is unlikely to have happened yet for a book that was written 40 years ago. Duplicating a copyrighted work (or significant portions ...
by philb
Sat Apr 10, 2021 9:50 pm
Forum: 8-bit acorn hardware
Topic: Advice on powering up after 20 years
Replies: 18
Views: 538

Re: Advice on powering up after 20 years

It does sound like it's at least trying to do something. Did you mean RO3057S not RO3075S? If so then I think those drives were relatively common at the time and there might be someone who has a spare PCB they could lend you to try, just in case what you have is an electronics failure not a mechanic...
by philb
Sat Apr 10, 2021 7:38 pm
Forum: 8-bit acorn hardware
Topic: Advice on powering up after 20 years
Replies: 18
Views: 538

Re: Advice on powering up after 20 years

Good work on the 180MB Fujitsu by the way, that sounds interesting!
by philb
Sat Apr 10, 2021 7:38 pm
Forum: 8-bit acorn hardware
Topic: Advice on powering up after 20 years
Replies: 18
Views: 538

Re: Advice on powering up after 20 years

I don't know much about Rodimes specifically, other than I seem to recall they had a fairly high mortality rate even in the 1990s. Can you tell by looking and/or listening whether the head is moving? One fairly common failure mode on older drives is that the head arm gets stuck in the parking positi...
by philb
Fri Apr 09, 2021 5:33 pm
Forum: 8-bit acorn hardware
Topic: FileStore restoration
Replies: 79
Views: 1667

Re: FileStore restoration

I think they use glass media but to be honest I'm not 100% certain. I was also a tiny bit nervous that the process might be too aggressive but they've come out well, and it was pretty cheap. I'm going to try painting the FileStores over the weekend and, if they look good, I'll take the other two cas...

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