Search found 549 matches

by IanS
Wed Mar 14, 2018 6:55 pm
Forum: software
Topic: Required Modules - A5000/OS 3.11
Replies: 5
Views: 326

Re: Required Modules - A5000/OS 3.11

I thought I was doing well having a 16Mb A540, I can only dream of 2GB.
by IanS
Wed Mar 14, 2018 3:57 pm
Forum: emulators
Topic: Spark FS and RPC Emu Starting from Scratch again!
Replies: 10
Views: 905

Re: Spark FS and RPC Emu Starting from Scratch again!

pixelblip wrote:Filing system or path Net: Not present.

Looks like there is a hard-coded path in TtxtInit
teletext.PNG

Change it to something else.
by IanS
Wed Mar 14, 2018 2:57 pm
Forum: emulators
Topic: Spark FS and RPC Emu Starting from Scratch again!
Replies: 10
Views: 905

Re: Spark FS and RPC Emu Starting from Scratch again!

Sparkplug is the easiest way to bootstrap the system, once you have that you can open other zip files (including spark fs).

https://www.4corn.co.uk/articles/sparkplug/
by IanS
Wed Mar 14, 2018 11:59 am
Forum: hardware
Topic: ECONET AEH60 schematics & ROM image
Replies: 11
Views: 390

Re: AEH60 schematics & ROM image

danielj wrote:Can't see any other use for it - although it could store updated modules I guess....

Looks like it:-
http://www.beebmaster.co.uk/32bit/A7000FixNet8.html
by IanS
Mon Mar 12, 2018 10:53 pm
Forum: hardware
Topic: ECONET AEH60 schematics & ROM image
Replies: 11
Views: 390

Re: AEH60 schematics & ROM image

jgharston wrote:
Ottly wrote:Do the schematics exist for this econet interface?
this one?

No, the AEH60 fits in the RISC-PC/A7000 network slot. That schematic also doen't have the collision detection, so shouldn't be used.
by IanS
Mon Mar 12, 2018 10:51 pm
Forum: hardware
Topic: ECONET AEH60 schematics & ROM image
Replies: 11
Views: 390

Re: AEH60 schematics & ROM image

I've never seen a schematic, but the fact it has programmable logic on the board would make it hard to reproduce, unless you had the details of the logic within. Do you want to re-create one just to get Econet on a RISC-PC/A7000, as there are simplified circuits that can use a standard master module...
by IanS
Mon Mar 12, 2018 8:54 pm
Forum: hardware
Topic: Econet Bridge Circuit Diagram
Replies: 7
Views: 939

Re: Econet Bridge Circuit Diagram

So, has anybody already built a homebrew Econet bridge? Not quite the same shape PCB, and it uses two econet modules rather than having the 6854's on-board, but it works fine. http://www.stardot.org.uk/forums/viewtopic.php?f=41&t=5594&p=163890#p163890 Beebmaster has some better photos of it...
by IanS
Sat Mar 10, 2018 1:49 pm
Forum: hardware
Topic: File system testing
Replies: 7
Views: 468

Re: File system testing

sirbod wrote:Having recently gone through this pain to track down the root cause of disc errors we were seeing on various devices, on the RiscPC and A-series...
[...]

Do you have test programs you can share? I could try writing somthing, but I'd then be testing my test programs as well as the hardware.
by IanS
Sat Mar 10, 2018 1:47 pm
Forum: hardware
Topic: File system testing
Replies: 7
Views: 468

Re: File system testing

daveejhitchins wrote:By the way, didn’t the version 5 have a SM IC underneath the PCB?

Yes, it has a HCT174 as a page latch for the rom. As ZIDEFS is only 8K, it's unnecessary, I only need two bits of page latch (I actually have 3 in the current design so can go up to a 16K image if needed)
by IanS
Fri Mar 09, 2018 11:42 pm
Forum: hardware
Topic: File system testing
Replies: 7
Views: 468

File system testing

As you may have seen I have re-created the ICS IDE podule (it's about as simple as an IDE podule can be). But so far it is working fine with ZIDEFS. http://stardot.org.uk/forums/viewtopic.php?f=41&t=5594&start=4440#p196675 However as Dave H mentioned, I don't have a ny series resistor, witho...
by IanS
Fri Mar 09, 2018 12:55 am
Forum: general
Topic: Today I received.....
Replies: 4538
Views: 293293

Re: Today I received.....

Hmm. Widely-spaced 64-pin connector one end, normal 40-pin the other. 32-pin DIL socket. Four 20/24-pin narrow DILs. That'll be the underside of an unpopulated IDE podule PCB? Ok, it wasn't the toughest quiz. It's since been populated. It's an ICS clone, so it works with ZIDEFS. It can also be fitt...
by IanS
Fri Mar 09, 2018 12:27 am
Forum: general
Topic: Today I received.....
Replies: 4538
Views: 293293

Re: Today I received.....

Well, technical, as it's after midnight it was yesterday.
IMG_20180308_233407894_HDR.jpg

Can you guess what it is?
by IanS
Wed Mar 07, 2018 11:32 am
Forum: other vintage computer hardware, software and games
Topic: No more leaded solder
Replies: 47
Views: 1362

Re: No more leaded solder

Ordered over the weekend, so yes.
by IanS
Wed Mar 07, 2018 11:27 am
Forum: other vintage computer hardware, software and games
Topic: No more leaded solder
Replies: 47
Views: 1362

Re: No more leaded solder

Farnell sold me some recently that arrived yesterday, try them.
by IanS
Wed Feb 21, 2018 3:46 pm
Forum: hardware
Topic: *FORMAT - Formatting floppy from console
Replies: 2
Views: 193

Re: *FORMAT - Formatting floppy from console

Are you missing part of the display on the left hand side. The format should be "DOS/x".
format.PNG
by IanS
Mon Feb 19, 2018 10:06 pm
Forum: projects
Topic: Making reasonable progress with a Sudoku solver
Replies: 75
Views: 2492

Re: Making reasonable progress with a Sudoku solver

Attached are updated versions with PASS set to be a word so that the count doesn't wrap for the hard puzzles above (but no other improvements). Jeremy Would that affect its ability to solve a puzzle, or just a display issue? If I fill in 1-9 in the top left 9 squares, it solves quite quickly. Put i...
by IanS
Mon Feb 19, 2018 7:03 pm
Forum: hardware
Topic: Can I use this to hook my Amiga to the CUB?
Replies: 8
Views: 317

Re: Can I use this to hook my Amiga to the CUB?

! Sorry, that probably sounded dim :D -> what I was driving at is why did they bother fixing it to digital RGB if it'll work fine in analogue mode, and be more generally compatible ;) :D d. In analog mode it would probably need resistors fitted in the cable to connect to a beeb. Like using a SCART ...
by IanS
Wed Feb 14, 2018 8:46 pm
Forum: software: other
Topic: Any Valentine software for the BBC?
Replies: 8
Views: 410

Re: Any Valentine software for the BBC?

Try these 2: http://bbcmicro.co.uk/game.php?id=2309 http://bbcmicro.co.uk/game.php?id=2307 Boring! I'd recommend this instead: http://bbcmicro.co.uk/game.php?id=1508 Looks like there is a problem with that. (I think it was only the second picture in) sam_currupt.png Still got to the end, suprisingl...
by IanS
Sat Feb 10, 2018 12:08 am
Forum: hardware
Topic: BBC micro black linear PSU repair
Replies: 12
Views: 414

Re: BBC micro black linear PSU repair

It's a very simple circuit, very little to go wrong. Plug it in and see if you get an AC output on each of the output windings before going any further. The rest can be eaily replaced, but the transformer would be harder to source a replacement.
by IanS
Fri Feb 09, 2018 11:40 pm
Forum: hardware
Topic: BBC micro black linear PSU repair
Replies: 12
Views: 414

Re: BBC micro black linear PSU repair

Have you seen this - https://martin-jones.com/2013/08/30/the-bbc-micro-linear-power-supply/ Looks like you need to identify the two output windings, with it disconnected from the mains you should be able to identify which wires are for which winding. I think you then need to ensure you get them phas...
by IanS
Tue Feb 06, 2018 7:46 pm
Forum: acorn atom
Topic: Atom duo 64k board issue
Replies: 14
Views: 501

Re: Atom duo 64k board issue

oss003 wrote:I think you typed #97FF instead of #9FFF in line 30, but that doesn't matter.

That wouldn't affect the printing of the last two blocks, I can't see an easy mistake that would cause the last two blocks to be untested.
by IanS
Sat Feb 03, 2018 1:35 pm
Forum: hardware
Topic: Today I overclocked my A3010
Replies: 287
Views: 16906

Re: Today I overclocked my A3010

Looks ok to me, but I'm no expert on thermal relief.

Could you add a label showing what the board is for. "Acorn Axxxx 4M Memory" or something similar.
by IanS
Sat Feb 03, 2018 1:14 pm
Forum: hardware
Topic: Today I overclocked my A3010
Replies: 287
Views: 16906

Re: Today I overclocked my A3010

Looks ok, a couple of comments on the aesthetics. Your initials and date are hidden under the silkscreen. oakram_bit.PNG It would be nice to move some of the component labels so they aren't under other components or cropped at the edge of the board. (e.g. X1, X2 and the C's on the top side) oakram.P...
by IanS
Thu Feb 01, 2018 1:11 pm
Forum: off-topic
Topic: Thermistor, washing machine and hair dryer
Replies: 11
Views: 456

Re: Thermistor, washing machine and hair dryer

Water level is done by a pressure sensor - air filled pipe connects to drum at one end and to a pressure sensor "in the dry". As the water level increases it goes up the pipe compressing the air which actuates an on/off switch (old school, giving a "reached level X"), or more li...
by IanS
Sun Jan 21, 2018 6:45 pm
Forum: archive submissions
Topic: Atom ROMs
Replies: 3
Views: 178

Re: Atom ROMs

Anyone know Paul Bond from the Econet Roms : * : * Copyright (c) Paul Bond : * 1981 Topexpress Ltd : * 1 Portugal Place : * Cambridge CB5 8AF : * England : * Tel CAMB 65128 Do you know if they work? Seems to be Econet 2.40 ("04.2 TENOCE" near the start of the roms)
by IanS
Thu Jan 11, 2018 8:41 pm
Forum: past events & exhibitions
Topic: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*
Replies: 143
Views: 8546

Re: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*

1024MAK wrote:On the Friday, numbers gradually fall during the afternoon. Leaving very diminished numbers after 16:30.

Mark

From the intro text, on Friday, we have the room from 5pm.

Sunday, people start to drift away from about lunch time.
by IanS
Tue Jan 09, 2018 12:55 pm
Forum: hardware
Topic: Econet podule for RISCPC & A7000
Replies: 71
Views: 10568

Re: Econet podule for RISCPC & A7000

So I've been trying to make a full Econet podule - http://stardot.org.uk/forums/viewtopic.php?f=41&t=5594&start=4320#p189894 Very interesting! Looks like it can take a standard Econet module as well as discrete components. Correct, Econet hardware modules are getting expensive, and apart fr...
by IanS
Sun Jan 07, 2018 10:43 pm
Forum: hardware
Topic: Econet podule for RISCPC & A7000
Replies: 71
Views: 10568

Re: Econet podule for RISCPC & A7000

So I dissassembled the econet module, to find that it was looking for "7" for ProdType_Econet. If I run "Podule_ReadInfo" (as the module does), with the bitmask &62, I don't get 7 from from the podule for the product type, I get a zero. I'll try some other podules for compari...
by IanS
Sun Jan 07, 2018 9:16 pm
Forum: hardware
Topic: Econet podule for RISCPC & A7000
Replies: 71
Views: 10568

Re: Econet podule for RISCPC & A7000

So I've been trying to make a full Econet podule - http://stardot.org.uk/forums/viewtopic.php?f=41&t=5594&start=4320#p189894 Each bit works ok, I just need a bit of help getting them to work together. With a single byte = 0x08 in the rom, the Econet module works fine. With an extended podule...
by IanS
Tue Jan 02, 2018 11:10 pm
Forum: past events & exhibitions
Topic: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*
Replies: 143
Views: 8546

Re: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*

Can you move me to the "with kit" list as I will probably bring a laptop, so somewhere to put it would be nice.