Search found 1758 matches

by jms2
Fri May 12, 2017 12:46 pm
Forum: off-topic
Topic: Windows Technical Support v a BBC Master 128
Replies: 8
Views: 182

Re: Windows Technical Support v a BBC Master 128

Fantastic work!! =D> Nearly 11 minutes of their time wasted must be a record - I kept one going in a very similar vein for nearly as long once, but I have to concede victory to you. Interesting technique you used, being quite open with them that this was a BBC computer and that it doesn't "do&q...
by jms2
Sun Apr 30, 2017 7:32 pm
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

OK - here's Draft 2 of Issue 3 of the Electron Advanced User Guide. I think this now includes everything that people have asked for following the review of draft 1. The headline changes compared to Issue 2 (still in red text for review purposes) are: - New cover picture to replace the bizarre compos...
by jms2
Sat Apr 29, 2017 9:30 pm
Forum: off-topic
Topic: Let's talk about serious matters
Replies: 3
Views: 130

Re: Let's talk about serious matters

OK, I tried it. First impressions are pretty good considering that this method is Not Officially Approved :wink:. This is what I did - it's not the same as what was mentioned in the article because I wasn't paying attention when I read it. #-o - Got the kettle nearly boiling, but not quite (it did s...
by jms2
Sat Apr 29, 2017 8:46 pm
Forum: off-topic
Topic: Let's talk about serious matters
Replies: 3
Views: 130

Re: Let's talk about serious matters

Interesting... never tried it, but I will give it a go.

I find that some cups of tea come out better than others, and I don't know why. If this method is more consistent then I will be pleased!
by jms2
Thu Apr 27, 2017 7:47 pm
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

Thanks -- that's now included. I've got another interesting little anomaly to resolve now, which relates to the main system variables (those set by OSBYTES &A6-&FF). I'm including all the details of these from the "Allmem" file into the EAUG, excluding anything which is not relevan...
by jms2
Tue Apr 25, 2017 10:13 pm
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

I have realised that I have more work to do in updating the memory map chapter, and I've been progressing that a bit today. There will be quite a lot of changes for the third edition; please keep the ULA discoveries (and other suggestions) coming! A question : what is &2F4 used for? It just says...
by jms2
Sun Apr 23, 2017 9:28 pm
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

davidb wrote:That looks good to me!


Excellent, thanks for the feedback David (s)!
by jms2
Sun Apr 23, 2017 6:42 pm
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

I've just checked what I did in the Electron ULA VHDL: https://github.com/hoglet67/ElectronFpga/blob/master/src/common/ElectronULA.vhd#L641 That's also suggesting the bit order is: <start bit> <bit 0> <bit 1> <bit 2> ... <bit 7> <stop bit> What exactly did I say earlier that contradicts this? I've ...
by jms2
Sun Apr 23, 2017 11:26 am
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

I see what you mean about the figure, but are you sure your understanding is correct? It clashes with what hoglet said previously, and also with this remark which was present in the original AUG: "If the byte is not read within about 2ms, the data will be lost forever as bit 7 falls off the end...
by jms2
Sun Apr 23, 2017 6:40 am
Forum: hardware
Topic: Electron ULA Documentation Updates
Replies: 69
Views: 2279

Re: Electron ULA Documentation Updates

I'll have a look at that David (the figure that is, I can't promise to unravel the mysteries of the shift register!) :D Your suggestion is the prompt I needed to get on and finish this draft. It is 90% done, but I got stuck with trying to contact Chris Dewhurst over the diagrams, and since then the ...
by jms2
Sun Apr 16, 2017 6:56 am
Forum: adventures
Topic: The Darkness of Raven Wood
Replies: 59
Views: 2233

Re: The Darkness of Raven Wood

BTW, a funny thing I noticed is that the Electron seems unable to display the colour yellow (or at least, ElectrEm is). On ElectrEm, colour 3 is white, colour 7 is gray. Is this the way the Electron display works, or is it an ElectrEm bug? C. That sounds very strange! Electrons certainly can displa...
by jms2
Sat Apr 15, 2017 7:44 am
Forum: other vintage computer hardware, software and games
Topic: IBM PC XT meets the 21st Century!
Replies: 16
Views: 404

Re: IBM PC XT meets the 21st Century!

Ah, I see. I did know about PC podules but I didn't realise you could get them for the A4000, nor that they were powerful enough to run Windows.

Reading your other thread, I do have the ARMDRV.DRV file... But for the Risc PC 486 card. I don't know if it would be the same...
by jms2
Fri Apr 14, 2017 9:51 pm
Forum: other vintage computer hardware, software and games
Topic: IBM PC XT meets the 21st Century!
Replies: 16
Views: 404

Re: IBM PC XT meets the 21st Century!

How is the A4000 running Windows?
by jms2
Fri Apr 14, 2017 8:11 am
Forum: other vintage computer hardware, software and games
Topic: IBM PC XT meets the 21st Century!
Replies: 16
Views: 404

Re: IBM PC XT meets the 21st Century!

That's a superb setup that you've put together. It's interesting to see, because my main recollection of these machines is seeing them in the corner of offices, covered with dirt, with a green screen and being used for stock control or something. We also had some at school, also with green screens, ...
by jms2
Thu Apr 13, 2017 12:48 pm
Forum: introduce yourself
Topic: 30 year old bbc micro reborn
Replies: 18
Views: 416

Re: 30 year old bbc micro reborn

Congratulations!! :D

... but if its a BBC B, surely it is more than 30 years old?
by jms2
Tue Apr 04, 2017 12:00 pm
Forum: introduce yourself
Topic: Hi from Derbyshire
Replies: 13
Views: 317

Re: Hi from Derbyshire

Hello from Derby Mark!
by jms2
Thu Mar 30, 2017 4:17 pm
Forum: acorn atom
Topic: New Acorn Atom Issue 5 owner
Replies: 14
Views: 294

Re: New Acorn Atom Issue 5 owner

That's a very nice machine! :D Congratulations.
by jms2
Thu Mar 30, 2017 4:15 pm
Forum: hardware
Topic: Repairing a broken Archimedes A3000 ... Update 14.05.17 - mouse progress - the mouse fully works too! I think, it's done
Replies: 159
Views: 3167

Re: Repairing a broken Archimedes A3000 ...

Ok, thanks, so it looks like Zarchos has them. I'd missed that. :D

Now, my A3000 is working ok despite having some corrosion in the sockets, but I'd say that if you are fault finding then renewing the sockets would be a smart move.
by jms2
Thu Mar 30, 2017 12:00 pm
Forum: hardware
Topic: Repairing a broken Archimedes A3000 ... Update 14.05.17 - mouse progress - the mouse fully works too! I think, it's done
Replies: 159
Views: 3167

Re: Repairing a broken Archimedes A3000 ...

I had the same problem with mine. I don't think it is possible to buy a new keyboard socket, but I would be delighted if someone was able to source an equivalent. The best thing to do is use a multimeter to check continuity of all the tracks in the area, and then repair the bad ones with Kynar wire....
by jms2
Tue Mar 28, 2017 3:19 pm
Forum: hardware
Topic: Announcement : Update on hardware produced by me.
Replies: 5
Views: 365

Re: Announcement : Update on hardware produced by me.

1024MAK wrote:In any event, the forum thanks you for you continued efforts =D>


Seconded! :D All my prime add ons are superb, and even the colour board is *nearly* perfect.
by jms2
Sat Mar 25, 2017 5:13 pm
Forum: hardware
Topic: A3020 Hard Drive Formatting for Dummies
Replies: 11
Views: 250

Re: A3020 Hard Drive Formatting for Dummies

Looks like you are correct... Have a look at this.

However, part of the board's functionality is to provide an Econet interface. This is a Good Thing, so rather than junk the board you really need to figure out how to disable the hard disk locking.
by jms2
Sat Mar 25, 2017 2:06 pm
Forum: introduce yourself
Topic: I had an Electron once..
Replies: 10
Views: 253

Re: I had an Electron once..

Hello and welcome Cris, I too had an Electron, then a BBC and then an A3000. I echo what everyone else has said about the battery, but from your other thread it sounds like you have already done something about that. Just a bit of nostalgic fun (from memory!): If your replacement battery is working,...
by jms2
Sat Mar 25, 2017 1:55 pm
Forum: hardware
Topic: A3020 Hard Drive Formatting for Dummies
Replies: 11
Views: 250

Re: A3020 Hard Drive Formatting for Dummies

Hello Cris, You are right, you do need !Hform to format the hard disc. And yes, the machine will read DOS 1.44mb floppies. However, it should be able to read and write to them, so this situation you describe with the write protect tab sounds like a fault. Not one I've heard of before either, but oth...
by jms2
Wed Mar 22, 2017 10:32 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

I tried out a different cable, and all seemed well... But only for a day, and now I am seeing Broken Directory errors. There is certainly a fault with the IDE interface, but it is an intermittent one.

I'm going to look for dirty contacts and dry joints.
by jms2
Tue Mar 21, 2017 10:47 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

It had to happen... no sooner had I decided that real HDDs are the future, then signs of the previous issues that I had start to reappear. :twisted: Specifically, on boot the third partition has disappeared, ie there's no icon on the icon bar, just a gap. This is exactly the kind of weird stuff that...
by jms2
Tue Mar 21, 2017 10:10 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

... and that worked fine, after some faffing about getting both IDE devices to share the same interface. The CF card insisted on being the Master no matter what I did to its jumpers, so I had to make the real HDD into the slave for the purposes of transfer. The strange thing was, the corruption pres...
by jms2
Tue Mar 21, 2017 6:19 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

I tried just typing *co. Idefsdiscs 4, and hey presto, four drives of the correct sizes appear! :D So thanks, you're right, it didn't need formatting at all. Now to try to salvage what I can from the CF card. My plan is to leave the partitions as they are but tell the disc to only use the first one....
by jms2
Tue Mar 21, 2017 6:59 am
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

All that said, and going back to the original post... unless you are mapping out defects or using a suspected faulty drive, HForm etc. only needs to set up the partition table to make a drive usable with RISC OS. Low level formatting isn't required on IDE HDDs in the way it used to be needed with S...
by jms2
Mon Mar 20, 2017 11:07 pm
Forum: hardware
Topic: Quarndon Electronics
Replies: 12
Views: 864

Re: Quarndon Electronics

Hello I worked at Quarndon Electronics Ltd for 30 years until it finally closed. I am the person who assisted the gentleman in the post above. I am now working for a new company who actually used to be a customer of Quarndon Electronics and was disappointed like the rest of you that we had to close...
by jms2
Mon Mar 20, 2017 10:59 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 10
Views: 316

Re: Formatting real harddiscs >512MB on RO3.1

flaxcottage wrote:On my A3000, which has a Castle IDE interface !HForm formatted the real hard disc with no problem.

That's interesting... Searching previous posts on here and elsewhere suggests that it doesn't work with third party interfaces, but maybe some are more compatible than others.

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