Search found 2507 matches

by BeebMaster
Mon Oct 16, 2017 3:18 pm
Forum: acorn atom
Topic: Acorn Atom Econet
Replies: 15
Views: 853

Re: Acorn Atom Econet

The hierarchical file structure wasn't introduced till the Level 2 file server. In Level 1 users had a single-letter-DFS directory allocated to them and the file server disc was an unmodified DFS disc, so if there are directories with full names being referred to it must be at least a Level 2 type l...
by BeebMaster
Sun Oct 15, 2017 10:13 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Yes, that's basically it, except it "looks" like a triangle as the two diodes are both connected to the same 5V point on the backplane. There's no diode in the battery holder, it's just a 3xAA battery holder which has 3 rechargeable batteries in. So what I hope I've done is to allow the RI...
by BeebMaster
Sun Oct 15, 2017 8:37 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Well, it probably is, most of my things are, but it works and hasn't gone on fire yet, so I've reassembled it and I now have two fully working RISC PCs repaired in the space of one weekend. I shouldn't have waited 6 months thinking I couldn't do it before doing it. I think I'll have to have a go at ...
by BeebMaster
Sun Oct 15, 2017 7:45 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Right. I have fixed it. I even found some 1N1001 diodes, I must have bought them for fixing MDFSes. With one diode I couldn't get the clock to keep going, it just set itself back to the last time input on every reset. I think that was because the clock chip wasn't being powered directly from the bac...
by BeebMaster
Sun Oct 15, 2017 5:37 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Diodes, schmiodes, I knew I wouldn't have any, apart from that special Domesday BAV21 type that looks like a chip. I've taken apart an old shrink-wrap Master battery pack, that has an IN4005, that'll have to do. Do I need 2 diodes? A300 picture shows two, but the RISC PC technical drawing battery/RT...
by BeebMaster
Sun Oct 15, 2017 2:59 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Very nice, although that wasn't an option for me as the pads on the main board were completely corroded away. Just working out how to relocate the battery with the minimum of fuss. If I put a Master 128 type battery holder with resistor & diode built-in, across the +5V and +0V I connected the cl...
by BeebMaster
Sun Oct 15, 2017 1:53 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

It's a bit rough and ready, and of course is only a proof-of-concept, but here is the first ever RISC PC Flying Clock! RPC600FlyingClock1.jpg RPC600FlyingClock2.jpg Works a treat, although the battery hasn't been added yet, and the on-board battery doesn't help, so it forgets itself after a power of...
by BeebMaster
Sun Oct 15, 2017 12:24 pm
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Yes, got all that here. Looking now.
by BeebMaster
Sun Oct 15, 2017 11:28 am
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Right, GUESSING after looking at the datasheet, before my impatience completely eats up my whole mind, body & soul: Pin 1 - Connect to crystal Pin 2 - Connect to crystal Pin 3 - dunno Pin 4 - Connect to battery negative Pin 5 - Connect to C20 on podule (as above) Pin 6 - Connect to C19 on podule...
by BeebMaster
Sun Oct 15, 2017 11:21 am
Forum: software: other
Topic: BBC Domesday Project - Source code available
Replies: 13
Views: 1021

Re: BBC Domesday Project - Source code available

This is a very exciting and important find! I understand now why a direct sector dump of the whole drive was sought. I've downloaded my own copy of the files, so far I've only looked at the EXALL listing and I'm drooling already! So are we learning that the BBC Domesday System, that pinnacle of 8-bi...
by BeebMaster
Sun Oct 15, 2017 11:01 am
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Well, that sounds so simple that even I could get it wrong.

Although I'd need a bit more detail of what pin connects to what other component etc.

I'm tempted to be getting the through-hole version of the clock chip if I'm going to do it.
by BeebMaster
Sun Oct 15, 2017 10:42 am
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Hmmm, interesting. I think that would work. The RPC 600 does exactly what the 700 was doing during its duff clock & crystal escapade, ie. red screen of life on power-on, (floppy drive light probably telling me the problem but it isn't connected up at the minute), then enters supervisor mode with...
by BeebMaster
Sun Oct 15, 2017 8:31 am
Forum: hardware
Topic: RISC-PC Not Working
Replies: 61
Views: 3431

Re: RISC-PC Not Working

Only 7 months later I have replaced the clock crystal and it is now back to being fully functional. Remembered the time and date overnight. Yesterday shortly after the repair the hard drive was behaving a bit curiously, it seemed to spin down after about 2 or 3 seconds and take the same amount of ti...
by BeebMaster
Fri Oct 13, 2017 4:12 pm
Forum: software: other
Topic: Variants of ADFS
Replies: 16
Views: 803

Re: Variants of ADFS

I can't offer any assistance really except to egg on anyone and everyone with the capability to do this. One of the major obstacles many of us are finding is being able to archive real SCSI/ST506 Winchester discs. Being able to do a direct sector copy from proper ADFS to IDE/CF/SD etc. ADFS would be...
by BeebMaster
Fri Oct 13, 2017 3:59 pm
Forum: hardware
Topic: 6502 second processor poll
Replies: 40
Views: 1669

Re: 6502 second processor poll

My first one (around 2002) was the board only from an external 6502 cheese wedge, from 8BS at a time when Chris had a few without the casing or PSU. I think that one eventually went in the Tesco Cheese Biscuits Box. Then more than one cheese wedge, a Master Turbo from Nelson IT (currently Station 20...
by BeebMaster
Sun Oct 01, 2017 7:47 pm
Forum: hardware
Topic: Compudata Hard-drive CS-1057
Replies: 54
Views: 1941

Re: Compudata Hard-drive CS-1057

If you really don't have a spare floppy disc handy then you might be struggling. But if you have DOS Plus discs 2, 3 or 4 there might be a spare bit of space on one of them, and the PC might read them. Otherwise I think you will have to get hold of a blank floppy or two (I can help gladly but there ...
by BeebMaster
Sun Oct 01, 2017 12:27 pm
Forum: other vintage computer hardware, software and games
Topic: Mystery device on eBay
Replies: 2
Views: 519

Re: Mystery device on eBay

It is interesting, I wonder what the insides look like?

I can't see that it connects to a Beeb (or anything else apart from the mains) so it isn't a BBC peripheral as such. Maybe it was just somebody's idea of an ultra-modern (at the time) egg-timer?
by BeebMaster
Sat Sep 30, 2017 4:52 pm
Forum: software
Topic: ST-506 Hard disc image creation
Replies: 17
Views: 817

Re: ST-506 Hard disc image creation

Can you use dd within RISCix?
by BeebMaster
Fri Sep 29, 2017 8:19 pm
Forum: hardware
Topic: Compudata Hard-drive CS-1057
Replies: 54
Views: 1941

Re: Compudata Hard-drive CS-1057

Ooh version 1.01, I think that's an unknown version. The File Server requires the second processor to be running so it won't work, you just get noise through the speaker usually as it runs at &400 and overwrites the sound buffer. Any combination of Beeb and 6502 second processor can be used - Ma...
by BeebMaster
Thu Sep 28, 2017 10:22 pm
Forum: hardware
Topic: Compudata Hard-drive CS-1057
Replies: 54
Views: 1941

Re: Compudata Hard-drive CS-1057

It's interesting because the boot sequence shows that it tries to run the Acorn print server, which requires a separate ROM, so as it isn't present, there are Bad command errors, and then it runs the file server. It is almost certainly the Acorn Level 3 file server of a version which detects the tim...
by BeebMaster
Mon Sep 25, 2017 4:59 pm
Forum: off-topic
Topic: Dolphin Columns
Replies: 7
Views: 554

Dolphin Columns

I use Ubuntu, with xfce4 desktop as standard, and Dolphin as my file manager of choice, although it isn't part of xfce4 and has to be installed separately. I've never got along with Nautilus, and Thunar is just too simple for my needs, only remembering the last choice of view settings so I can't hav...
by BeebMaster
Fri Sep 08, 2017 12:23 pm
Forum: hardware
Topic: SRAM PCB modification difficulties
Replies: 14
Views: 711

Re: SRAM PCB modification difficulties

It isn't necessary to modify the PCB, you can instead modify the chip by soldering flying wires to the pins and attaching these permanently (by soldering) or temporarily (using a spring-loaded probe clip or similar) to the points on the PCB. That way there's no permanent change to your BBC, there's ...
by BeebMaster
Mon Sep 04, 2017 8:57 pm
Forum: off-topic
Topic: Fine Ales
Replies: 18
Views: 827

Re: Fine Ales

I know this is under "off-topic", but what the Viglen is this??!!!

danielj wrote:Signature
-------
ZX81, Spectrum 48k, Amstrad CPC464, C64

by BeebMaster
Tue Aug 29, 2017 8:41 pm
Forum: hardware
Topic: Domesday pre-release laserdiscs found
Replies: 2
Views: 518

Re: Domesday pre-release laserdiscs found

Very interesting. I suppose it stands to reason that there was a test version, or at least an earlier version before the main release because in the first instance software and hardware actually got tested in those days before being dumped on the general public!!!! and they would have needed a worki...
by BeebMaster
Sun Aug 13, 2017 4:56 pm
Forum: hardware
Topic: A4 ALA66 A4 Econet module?
Replies: 2
Views: 374

Re: A4 ALA66 A4 Econet module?

They are pretty rare, as the number of responses may hint at! CJE sometimes have them, they may be operating a waiting list for one. Perhaps this is moment for someone to step in and adapt a standard Econet module to fit the A4? Does the A4 have the capability to take an Archimedes podule? An Econet...
by BeebMaster
Sun Aug 13, 2017 4:52 pm
Forum: hardware
Topic: ROM for the Acorn IEEE-488 wedge...
Replies: 7
Views: 950

Re: ROM for the Acorn IEEE-488 wedge...

I make quite a bit of use of sideways RAM for loading ROM images, and only usually commit them to EPROM if I need a permanent solution.

On my Econet file server, I often have users created specifically for the purpose of loading a particular ROM, eg. *I AM IEEE, *I AM ANFS418, *I AM BASIC4 etc.
by BeebMaster
Sat Aug 12, 2017 9:38 pm
Forum: general
Topic: Winchester Hard Drive Noises
Replies: 9
Views: 860

Re: Winchester Hard Drive Noises

Ooh what a lovely thread!

Here's a Seagate ST225.
ST225.mp3.7z
(562.8 KiB) Downloaded 23 times

I always thought the Miniscribe 8425 had the best sounds, but I don't have one handy.
by BeebMaster
Sat Aug 12, 2017 7:52 pm
Forum: hardware
Topic: ROM for the Acorn IEEE-488 wedge...
Replies: 7
Views: 950

Re: ROM for the Acorn IEEE-488 wedge...

I've used IEEEFS0.5 to work with my kit, although to very little avail as you can't do much without an IEEE488 device attached to the adapter. I seem to recall that there is a mistake in the manual which is corrected in JGH's version - possibly there is a thread on here about this. My last set of pi...
by BeebMaster
Tue Aug 08, 2017 7:18 pm
Forum: off-topic
Topic: how is it called metal box for 3,5 or 5,25
Replies: 21
Views: 2077

Re: how is it called metal box for 3,5 or 5,25

Ooh nice, I like that! Matching black bezel and ribbon cable as well!
by BeebMaster
Sun Aug 06, 2017 5:29 pm
Forum: software: other
Topic: L3 Server Changelog
Replies: 26
Views: 2229

Re: L3 Server Changelog

Here's another thought...the earliest version of the FileStore code, in ROM, appears to be 1.31. That's not much of a leap from 1.24 (less so than the previously latest-known version of L3, 1.07). So maybe the FileStore used the same code, tweaked for use with the slightly different hardware.