Search found 958 matches

by poink
Sat Aug 27, 2016 1:40 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4624

Re: T11 second processor board?

It looks like Acorn and other 2nd processors producers just chose Z80 and missed T11. Tthe Z80 second processor completed the specification Acorn originally presented with the BBC (and I believe was part of the agreement). The T-11 might be technically better, but magazine coverage of the time drov...
by poink
Thu Aug 25, 2016 9:43 pm
Forum: hardware
Topic: RiscPC CMOS Amnesia
Replies: 22
Views: 2166

Re: RiscPC CMOS Amnesia

I am not sure if the red screen indicates CMOS reset, so it's almost like it's always being started with 'R' pressed. A CMOS reset is a red border. A red screen apparently indicates that part of the power-on self test has failed . A magenta (which the documentation calls 'purple') screen is display...
by poink
Sun Aug 07, 2016 11:35 pm
Forum: hardware
Topic: SASI vs SCSI question
Replies: 9
Views: 896

Re: SASI vs SCSI question

Do different versions of ADFS support only SASI, or only SCSI? Or is there no real difference between them (I thought SASI was a subset of SCSI-1, but I could be wrong!)? It's more of an evolution; so...it's similar, and often backwards compatible, but probably different enough to justify separate ...
by poink
Sat Aug 06, 2016 10:08 pm
Forum: hardware
Topic: A3010 4 Mbyte RAM upgrade, the SIMM way
Replies: 26
Views: 2920

Re: A3010 4 Mbyte RAM upgrade, the SIMM way

OK understood, not a great find in this text file in reality. The bit that interested me is that it talks about connecting up an inverted DBE to /WR. Unfortunately, I think that's just because the stock A5000 doesn't allow for 4MB expansion boards - which means you've got to get RA9 off the board, ...
by poink
Sat Aug 06, 2016 9:34 pm
Forum: general
Topic: Why did so many BBC games ignore joysticks?
Replies: 15
Views: 2146

Re: Why did so many BBC games ignore joysticks?

The socket was there, built in and ready at the back. I know it wasn't a games machine but coders could have made life easier, as even many of the same games were on other platforms because they used sticks. Good question. At a guess, some combination of: the Model A not being fitted with the ADC (...
by poink
Sat Aug 06, 2016 6:48 pm
Forum: general
Topic: GALLERY: Do you back up your tapes to WAV?
Replies: 12
Views: 1306

Re: GALLERY: Do you back up your tapes to WAV?

There's being mysterious and alluring, and there's just taking the piss. Right, Acorn? 8) Tape loading issues are incredibly frustrating - I know from back in the day, when I never really got tapes to work on any regular basis. Personally, I'd suspect the tape unit, rather than the Beeb, which was ...
by poink
Sat Aug 06, 2016 5:47 pm
Forum: off-topic
Topic: Wi Fi Bottleneck in Linux NFS
Replies: 19
Views: 1481

Re: Wi Fi Bottleneck in Linux NFS

With wireless, it's as if it can't send and receive at the same time. It can't - WiFi is half duplex. Doubtless someone is working on it (I can find papers from 2011 etc.,), however I don't believe that anything commonly deployed can do it. Here's a picture from the system monitor showing network a...
by poink
Sat Aug 06, 2016 3:30 pm
Forum: general
Topic: GALLERY: Do you back up your tapes to WAV?
Replies: 12
Views: 1306

Re: GALLERY: Do you back up your tapes to WAV?

I've had no problem converting to UEF but for the life of me, I fail to see how serial data transfer of the tape stream was never the BBC staple. My understanding is that the Beeb's tape handling itself is fairly robust. I suspect that tools to handle UEF on more boring machines suffer slightly bec...
by poink
Sat Aug 06, 2016 2:55 pm
Forum: general
Topic: Today I received.....
Replies: 5235
Views: 389445

Re: Today I received.....

I thought for a £60 Buy It Now, you'd get what you pay for, with just the dust holding it together. But it's virtually shop condition under the dirt. Clacky keyboard, pristine insides, new feel, the lot. There's just a couple of feet missing. Nice! eBay does...very occasionally...come through. If y...
by poink
Sat Aug 06, 2016 12:33 pm
Forum: wanted
Topic: BBC micro black linear PSU
Replies: 21
Views: 2300

Re: BBC micro black linear PSU

So an old PSU and a massive heatsink would finish the job. I do find the desirability of the old PSUs somewhat amusing given that they're objectively terrible for the task (not least making having a fire extinguisher nearby advisable). ^did he not swap it with MarkH /retro clinic for a new PSU, & h...
by poink
Sat Aug 06, 2016 1:47 am
Forum: wanted
Topic: BBC micro black linear PSU
Replies: 21
Views: 2300

Re: BBC micro black linear PSU

Oh, and by the way, I HATE the inaccurate term "linear power supply" as the operation is highly non-linear.... "Conventional" or "series regulated" are better :wink: Whilst we're being picky, isn't it called 'linear' because (at least in principle) the regulation element(s) are operating in its lin...
by poink
Wed Aug 03, 2016 10:10 pm
Forum: emulators
Topic: Brandy
Replies: 3
Views: 876

Re: Brandy

The documentation says the inline assembler, CALL, USR is mot implemented. How hard would implementation be? It'd be quite invasive if you needed to be able to assemble, then execute the result. On any recent OS, you've got no-execute memory protection for security, so you'd have to ensure that you...
by poink
Wed Aug 03, 2016 8:27 pm
Forum: general
Topic: Today I received.....
Replies: 5235
Views: 389445

Re: Today I received.....

lazarusr wrote:Plus it came with a life time supply of polystyrene packing chips. :shock:
No matter how careful you thought your containment protocols were, you'll be finding them for weeks. (At least it's not shredded polystrene sheet.)
by poink
Wed Aug 03, 2016 7:30 pm
Forum: other vintage computer hardware, software and games
Topic: BBC vs. PET Science-Off!
Replies: 14
Views: 2628

Re: BBC vs. PET Science-Off!

1024MAK wrote:To be fair, Atom's (with their expansions) and Acorn System computers with their 19 inch rack mount cases look the job IMHO :D
Yes, they do.

If you insisted on it being a Beeb, maybe the Reuters APM, given it's a rackmount Beeb?
by poink
Wed Aug 03, 2016 7:24 pm
Forum: other vintage computer hardware, software and games
Topic: BBC vs. PET Science-Off!
Replies: 14
Views: 2628

Re: BBC vs. PET Science-Off!

Commie_User wrote:I don't know about you but the PET seems to suit a grown-up lab setting more than a Beeb.
On TV or publicity photos, the PET. In an actual grown up lab setting, the Beeb.
by poink
Wed Aug 03, 2016 8:03 am
Forum: hardware
Topic: A3010 4 Mbyte RAM upgrade, the SIMM way
Replies: 26
Views: 2920

Re: A3010 4 Mbyte RAM upgrade, the SIMM way

Zarchos wrote:Which choice is relevant ? 1 or 2 connections ?
It doesn't matter; the write signal is the same on both sockets.

(There is a separate write signal for the motherboard RAM, which you shouldn't connect to.)
by poink
Tue Aug 02, 2016 9:36 pm
Forum: hardware
Topic: A3010 4 Mbyte RAM upgrade, the SIMM way
Replies: 26
Views: 2920

Re: A3010 4 Mbyte RAM upgrade, the SIMM way

I add the question about OE in my previous 'need help' message. I don't think you need /OE, because the /CAS, /RAS and /WR lines should be sufficient. AH-HA! I think I see the problem, the write enable line is missing in my original list; connect /WE on the SIMM to /WR on the A3010 . Also, you do n...
by poink
Mon Aug 01, 2016 10:33 pm
Forum: hardware
Topic: Can I have a variable speed knob for the BBC, please?
Replies: 19
Views: 2191

Re: Can I have a variable speed knob for the BBC, please?

So Gorilla must have been faster than I recall without. I did get further in today. It might not be any slower. That command (which is essentially a poke[1]) only slows down things that rely on that 100Hz timer, like the OS sound code. There are plenty of other ways to get a consistent timebase in ...
by poink
Mon Aug 01, 2016 6:05 pm
Forum: hardware
Topic: Can I have a variable speed knob for the BBC, please?
Replies: 19
Views: 2191

Re: Can I have a variable speed knob for the BBC, please?

That sounds a great idea. However is that not wiped out loading Killer Gorilla, which I still think runs the same barring the music? There's two distinct problems; the first is changing the speed of sound playback (for pitch bending etc.,), the second is changing the speed of games to make them eas...
by poink
Mon Aug 01, 2016 4:56 pm
Forum: software: other
Topic: Is there an example of how to execut a * command from keybrd buffer
Replies: 12
Views: 1012

Re: Is there an example of how to execut a * command from keybrd buffer

Sorry, guys . . . I may have not explained my requirement (and my ignorance!) correctly . . . . I'm fetching ASCII characters, from a sideways bank, into a string variable. I'll try to expand on my previous comment. If you've got a string variable A$, if that variable contains the string CASTLE, yo...
by poink
Mon Aug 01, 2016 4:29 pm
Forum: software: other
Topic: Is there an example of how to execut a * command from keybrd buffer
Replies: 12
Views: 1012

Re: Is there an example of how to execut a * command from keybrd buffer

Ah! Yes . . . I've been reading the AUG but have not found an example, so don't fully understand the process. It's OSCLI <str>, so you could do OSCLI "CASTLE" or, introducing variables, A$="CASTLE" OSCLI A$ If you need more, it looks like http://www.benryves.com/bin/bbcbasic/manual/Keyword_OSCLI.ht...
by poink
Mon Aug 01, 2016 4:21 pm
Forum: hardware
Topic: Can I have a variable speed knob for the BBC, please?
Replies: 19
Views: 2191

Re: Can I have a variable speed knob for the BBC, please?

So if you slow the CPU by means other than the CPU clock, notes will sound for longer, and any shaping of the note by the OS will also be extended (but it does depend on if the OS uses interrupts for timing). I've just been looking at the MOS disassembly, and your concern about the use of interrupt...
by poink
Sun Jul 31, 2016 2:17 am
Forum: general
Topic: Obsolete? Hmmph!
Replies: 20
Views: 1414

Re: Obsolete? Hmmph!

And a fax machine is still required, apparently, to transmit a legal signature. No; it's not required, in fact, it's likely actually better, in terms of your legal standing, to cryptographically sign a computer file than to fax a signed document. The legality of electronic signatures was confirmed ...
by poink
Sat Jul 30, 2016 11:29 pm
Forum: hardware
Topic: StrongARM Speed
Replies: 6
Views: 1081

Re: StrongARM Speed

Even I had thought of that - it's got a fan/heat sink on it, so I can't tell, is there another way ? Your best option is probably !Sick (or maybe !ArmSI), although, that'll tell you the current speed, rather than the rated one (apparently, the 160MHz ones were overclocked to 202MHz). I don't believ...
by poink
Thu Jul 28, 2016 3:04 pm
Forum: hardware
Topic: A3010 4 Mbyte RAM upgrade, the SIMM way
Replies: 26
Views: 2920

Re: A3010 4 Mbyte RAM upgrade, the SIMM way

Personally I think I would use a 2.54mm pitch ribbon cable (like IDE cables). You ideally want all the wires to be exactly the same length and not criss cross each other too much, a ribbon cable makes that easier. The downside of ribbon cable is crosstalk, of course; because they run next to each o...
by poink
Tue Jul 26, 2016 10:47 pm
Forum: adventures
Topic: New Adventures?
Replies: 185
Views: 21941

Re: New Adventures?

Still got to leave room for the Program too. ;-) lol. Thats through DFS though right? Does the BBC use ADFS too like the Electron did. That could manage 80 track 640k maximum I think? The greater capacity on ADFS disks is because of the use of MFM encoding, which requires a 1770-style floppy contro...
by poink
Sun Jul 24, 2016 7:21 am
Forum: hardware
Topic: A3010 4 Mbyte RAM upgrade, the SIMM way
Replies: 26
Views: 2920

Re: A3010 4 Mbyte RAM upgrade, the SIMM way

I believe it's: left right simm -------------------------------------- A0-A9 MA0-MA9 VDD VDD VDD VSS VSS VSS RAS RAS RAS0 and RAS2 (at least one of the socket RAS lines to [i]both[/i] on the SIMM. LCAS CAS0 (for D0-D7 left) UCAS CAS1 (for D8-D15 left) LCAS CAS2 (for D0-D7 right) UCAS CAS3 (for D0-D1...
by poink
Sat Jul 23, 2016 5:44 pm
Forum: software: other
Topic: Was the BBC typeset ever reconfigured in programs?
Replies: 9
Views: 2301

Re: Was the BBC typeset ever reconfigured in programs?

It's nice and all, very sciencey when you look at it on a CUB. But what do we have? And are there any fonts to boot? There's a lot of programs that reconfigure the character set (and the OS provides facilities to do it fairly easily). You've probably run several without realising it - the most comm...
by poink
Sat Jul 23, 2016 4:56 pm
Forum: hardware
Topic: A3000 with keyboard problems
Replies: 10
Views: 1113

Re: A3000 with keyboard problems

Do you see any signs of corrosion on the keyboard socket ? Have you checked the end of the flat ribbon keyboard connector has all its black conductive material ? There could be enough missing so that the keyboard works on another machine but not when plugged into this A3000. Cutting 2 or 3 millimet...
by poink
Sat Jul 23, 2016 1:33 pm
Forum: hardware
Topic: A3000 with keyboard problems
Replies: 10
Views: 1113

A3000 with keyboard problems

I've recently acquired an A3000 that seems to be working other than the keyboard. Internally, it's very clean, although the battery (now removed) had turned. (The 4MB upgrade passes the RAM test, however, it seems stuck - any ideas?) Most of the keys work, however a couple don't work at all, whilst ...