Search found 2900 matches

by BeebMaster
Fri Nov 15, 2019 2:30 pm
Forum: hardware
Topic: IDEFS LFAU 2K vs. 1K
Replies: 4
Views: 185

Re: IDEFS LFAU 2K vs. 1K

When I replaced the hard drive in my RISC PC 700 in 2017 (RISC OS 3.7) with a "40GB" drive (actually 40,000,000,000 bytes probably), I could only format it with a LFAU of 128K, the formatter wouldn't let me go any lower. So although there are only 520MB of space used according to a file count, the a...
by BeebMaster
Fri Nov 15, 2019 2:18 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 22 to 24 November 2019 - NOW FULL
Replies: 104
Views: 3888

Re: ABUG SOUTH 22 to 24 November 2019 - NOW FULL

Just a week to go, so I'm starting to think about what to bring. I think there's probably only going to be table space for one full machine setup at a time so I plan to bring my workhorse Master Turbo (Station 114) with dual 5.25" floppy drives, BeebSCSI and PiTube as the main setup. I can also brin...
by BeebMaster
Thu Nov 14, 2019 12:24 am
Forum: hardware
Topic: EPROM?
Replies: 4
Views: 230

Re: EPROM?

Sssshhhh that's a secret! Actually, I am running short of them after all these years! So the batch of 8271 disc kits (if Texas Instruments actually eventually trouble themselves to fish out the blueprint for the 74LS393 and make some) might have some ceramic 27C256 with a window and everything!
by BeebMaster
Thu Nov 14, 2019 12:14 am
Forum: software & utilities for the pc, mac or unix
Topic: Proposal for BBC BASIC 'FOR lists'
Replies: 26
Views: 706

Re: Proposal for BBC BASIC 'FOR lists'

It's a nice idea, and the ability to loop with string variables rather than numeric variables does sound like it would be very handy, but I am still trying to think of an actual programming use for this FOR extension. It could be used where sequences of data have a recognisable numeric value but irr...
by BeebMaster
Wed Nov 13, 2019 12:48 pm
Forum: emulators
Topic: Econet on BeebEm for OSX (Mac)
Replies: 4
Views: 136

Re: Econet on BeebEm for OSX (Mac)

There should be an error eventually after *CAT, do you not get any response at all? (Even after five minutes)? ANFS will work in sideways RAM and should always show up in *ROMS, if it's not appearing there when loaded into sideways RAM then it might be a corrupt ROM image. There are circumstances wh...
by BeebMaster
Wed Nov 13, 2019 9:37 am
Forum: emulators
Topic: Econet on BeebEm for OSX (Mac)
Replies: 4
Views: 136

Re: Econet on BeebEm for OSX (Mac)

I can't speak for how it might work in an emulator, but you get that behaviour on a Master 128 when there is some communication problem with the network, like an incorrect clock speed, faulty Econet interface, a termination problem or crossed wires for example. (In most cases you eventually get the ...
by BeebMaster
Sat Nov 09, 2019 12:29 pm
Forum: hardware
Topic: Cumana disc drive
Replies: 3
Views: 136

Re: Cumana disc drive

It sounds like it might be the protective square metal cover for the drive head which has come unstuck and worked loose blocking the disc entry. If you take the lid off the drive you will probably be able to remove it and discard or re-affix.
by BeebMaster
Fri Nov 08, 2019 9:31 pm
Forum: off-topic
Topic: E-Bay Complaint
Replies: 17
Views: 507

Re: E-Bay Complaint

Well thank you all, I thought it deserved a bit more exposure:

https://www.ebay.co.uk/itm/202818102892
by BeebMaster
Fri Nov 08, 2019 2:24 pm
Forum: off-topic
Topic: Why Is E-Bay Showing Me Other People's Recently Viewed Items?
Replies: 26
Views: 836

Re: Why Is E-Bay Showing Me Other People's Recently Viewed Items?

Oh that's interesting, I have heard of that but I thought it was just for knitting and teapots and what-not.
by BeebMaster
Fri Nov 08, 2019 12:42 pm
Forum: off-topic
Topic: E-Bay Complaint
Replies: 17
Views: 507

E-Bay Complaint

I've had enough of them now...

by BeebMaster
Wed Nov 06, 2019 11:26 pm
Forum: off-topic
Topic: Why Is E-Bay Showing Me Other People's Recently Viewed Items?
Replies: 26
Views: 836

Re: Why Is E-Bay Showing Me Other People's Recently Viewed Items?

Interesting...I never had the verification thing but definitely had the "showed what everyone else was watching" thing. I'm frit to turn the adblocker back on now in case it starts asking me to identify component part of the American road traffic system.
by BeebMaster
Wed Nov 06, 2019 11:21 pm
Forum: hardware
Topic: Best display for a BBC?
Replies: 12
Views: 671

Re: Best display for a BBC?

Not tried that, but my Pi powers it from the HDMI input without it even being connected to the mains.
by BeebMaster
Tue Nov 05, 2019 11:39 pm
Forum: hardware
Topic: Best display for a BBC?
Replies: 12
Views: 671

Re: Best display for a BBC?

I have one of these and it works well (although it is currently deployed purely as a "keep-alive" for my Raspberry Pi 4 which loses all contact with input devices unless it is outputting some HDMI to somewhere). I think they are actually unbranded. You need one that accepts RGB SCART input (the 5th ...
by BeebMaster
Tue Nov 05, 2019 1:47 pm
Forum: off-topic
Topic: Toshiba TV Haunted!
Replies: 21
Views: 962

Re: Toshiba TV Haunted!

Unfortunately budget constraints have dictated the quality of what we can afford, and long ago we decided that the television set must cost less than a full central heating system. Anyway, I'm glad to report that on our third attempt...no wait, I'm not going to tempt fate by finishing that sentence....
by BeebMaster
Tue Nov 05, 2019 1:37 pm
Forum: off-topic
Topic: Why Is E-Bay Showing Me Other People's Recently Viewed Items?
Replies: 26
Views: 836

Re: Why Is E-Bay Showing Me Other People's Recently Viewed Items?

They're trying to sell me ladies' underwear now...
Screenshot_2019-11-05_13-32-57.png
by BeebMaster
Tue Nov 05, 2019 12:08 pm
Forum: hardware
Topic: RiscPC palette weirdness
Replies: 6
Views: 252

Re: RiscPC palette weirdness

Some of those pictures look like something has gone awry with the logical to physical colour mapping (assuming it's the same principle as used in Beebs): it looks like somebody has been playing about with VDU 19 to change black (and green) to red, for example, and the everton mint stripes remind me ...
by BeebMaster
Wed Oct 30, 2019 9:40 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2950
Views: 276758

Re: LOLPRICE

Makes my own little Apple offering on there look rather lame. Perhaps I should increase the reserve price by a factor of 100,000...
by BeebMaster
Sun Oct 27, 2019 3:51 pm
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

Unfortunately the external keyboard didn't help. All I ever got was a quick flash on the caps lock and num lock lights at start-up, or steady on when holding the reset button, but nothing else. Also I tested the keyboard in the A3020 and whilst it mostly works, there are several keys not working, wh...
by BeebMaster
Sat Oct 26, 2019 8:30 pm
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 849

Re: Loading a ROM into SW Ram - basics

I can't quite see how, but this must be a functional difference between a B and a Master because with DFS 2.25/SRAM 1.05 loaded into SRAM (!!!!) and ROM 9 unplugged, I still get Illegal parameter.
by BeebMaster
Sat Oct 26, 2019 8:11 pm
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 849

Re: Loading a ROM into SW Ram - basics

I don't have a 1770 Model B to test, but with that on M128 I get "Illegal parameter". I can now get Illegal address, but only by using SRDATA or SRROM on a bank that isn't Sideways RAM (ie. 4-7 on the Master). But there appears to be a bug, because after an SRLOAD command the behaviour of SRDATA and...
by BeebMaster
Sat Oct 26, 2019 8:00 pm
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 849

Re: Loading a ROM into SW Ram - basics

I think we need to trace how this Illegal address error comes about, because although I can see it listed within the 1770 DFS ROM, I can't do anything which generates this error. Most incorrectly formed SRLOAD commands give a Bad command error, sometimes an Illegal parameter error, but I can't get i...
by BeebMaster
Thu Oct 24, 2019 9:22 am
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

Luckily I have a backup on my MDFS from May 2015, which means it I had it working as recently as that, meaning that my memory is at fault. I thought that couldn't be right and it isn't. My memory and logic are both at fault. That's the date I backed up my MDFS to my RPi NFS server, so all it means ...
by BeebMaster
Wed Oct 23, 2019 10:51 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 217

Re: RISC PC Disappearing Memory

I just had the RISC PC on again, and noticed it was showing 130MB, but then it crashed during the early part of the boot sequence. Pressing reset was the only way out and then it gave me address exception errors and and a supervisor prompt. Ctrl-Reset set it back to 66MB and working again. I'm wonde...
by BeebMaster
Tue Oct 22, 2019 1:08 pm
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

Steve3000 is very kindly lending me his keyboard adapter, so whilst the Post Office decide when they are going to deliver it, I am pressing on with other patients in the mortuary. The very good news is that the second, Family Pack A3010 is fully working. Several keys weren't working initially (F10-F...
by BeebMaster
Mon Oct 21, 2019 2:13 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 217

Re: RISC PC Disappearing Memory

The only other 72-pin RAM module I have is a 4MB one, and installing that gives me a 70MB RAM message with the two modules in either slot. So that rules out my 64MB max theory. I think it also rules out faulty sockets on the board, although the 4MB module only has chips on one side, so it could stil...
by BeebMaster
Mon Oct 21, 2019 12:58 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 217

Re: RISC PC Disappearing Memory

Very possibly, there are chips on both sides. I wonder how I would test that. I didn't really think it would be a RAM fault as I thought POST would find it, but the Technical Reference Manual mentions a CMOS bit which skips a long RAM test for machines > 64MB RAM, I could do with re-enabling that, i...
by BeebMaster
Mon Oct 21, 2019 12:33 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 217

RISC PC Disappearing Memory

This is a new one on me. I noticed a few days ago that the amount of applications RAM on my RPC 700 had reduced considerably, and re-starting it I got a "RISC OS 66MB" message instead of the usual "RISC OS 130MB". I don't know where the other 64MB has gone! I've checked down the back of the sofa and...
by BeebMaster
Fri Oct 18, 2019 10:07 am
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

There's no flashing from the floppy. The only sign of life I can get is using the UHF out. When it's switched on a get a fairly steady black screen as opposed to snow/jittering with it switched off. I've given the board another clean with vinegar then water then IPA and let it dry out overnight, and...
by BeebMaster
Thu Oct 17, 2019 12:44 pm
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

Ah - Technical Reference Manual tells me that LK3 is for a serial keyboard. Don't think I've got one...
by BeebMaster
Thu Oct 17, 2019 11:37 am
Forum: hardware
Topic: An0n0 Mortuary
Replies: 8
Views: 508

Re: An0n0 Mortuary

That POST code is "unreadable CMOS" which is entirely predictable of course but since it's been that way for 9 years or more it might be a dead duck without extensive surgery. Nothing flashes now - but I can't recollect if the A3010 flashes on the floppy disc drive light or the light on the keyboard...