Search found 1774 matches

by RobC
Fri Nov 17, 2017 2:05 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 127
Views: 3683

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

I'll be arriving tomorrow too. My plan is to bring some soldering kit as I'll be fitting some VideoNuLA boards. (I'll also have a few spares if anyone wants to buy one!) I'll bring a Beeb running Unix under the Pi copro PDP11 emulator and my laptop in case I get a chance to do some work on BeebJack....
by RobC
Wed Nov 15, 2017 9:48 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 127
Views: 3683

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

IanS wrote:Anyone going at the weekend got a spare dram chip KM41C1000P-12 (1Mx1bit), or equivalent they can bring along for my A440/R140?

viewtopic.php?f=16&t=14064

I'll have a look - I picked up some Arc RAM chips a while back.
by RobC
Wed Nov 15, 2017 7:56 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

So, if I understand correctly we have a PDP emulator running on a real ARM in the form of Pi Tube Direct. Yes. In all of that do we have a portable (e.g C) PDP emulator or is it in ARM assembler? It's based on the Sanos PDP11 SimH emulator which is in C: http://www.jbox.dk/sanos/pdp11.htm It only n...
by RobC
Wed Nov 15, 2017 4:20 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

I've now got this working on the native Pi co-pro. It needs the changes implemented in the Diamondback dev release but seems to be running happily on my 1GHz Pi Zero. As expected, it's much faster than the ARMTDMI and certainly feels comparable to my recollections of using Unix on a mainframe in the...
by RobC
Tue Nov 14, 2017 3:02 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 127
Views: 3683

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Last time at Markfield I managed to repair my A4 keyboard connector, which was nice. Unfortunately since then my A4 has failed in another way. Would anyone be willing to assist in a little diagnostic help over the weekend? Happy to try to help. I can bring a working A4 PSU if that would help? Think...
by RobC
Tue Nov 14, 2017 12:27 pm
Forum: projects
Topic: Starting a Prince of Persia port...
Replies: 129
Views: 7879

Re: Starting a Prince of Persia port...

Looking forward to seeing this :D

Given that it's already Master-only, is it worth thinking about just requiring an extra 16K of sideways RAM? I'm guessing that many Master owners have a cartridge that gives RAM in slot 0/1 or 2/3.
by RobC
Tue Nov 14, 2017 10:30 am
Forum: introduce yourself
Topic: Hello, I am a keen acorn owner and hope to take part in the forum.
Replies: 12
Views: 299

Re: Hello, I am a keen acorn owner and hope to take part in the forum.

Welcome to the forum and best wishes for the rest of your treatment.
by RobC
Sun Nov 12, 2017 4:56 pm
Forum: software: other
Topic: DOS Plus assisstance
Replies: 6
Views: 160

Re: DOS Plus assisstance

ERASE filename

works for me.
by RobC
Fri Nov 10, 2017 11:02 pm
Forum: hardware
Topic: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.
Replies: 25
Views: 775

Re: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.

is it possible to copy the dosboot from the cf card to a physical floppy and boot up the old fashioned way? Not sure - I'll have a look at my original boot disk to see what format it's in and what's on there. Also, how do you access/use the panos stuff with the pitube pandora copro option? From ADF...
by RobC
Fri Nov 10, 2017 4:54 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Thanks - 16MB should be more than enough as it runs on the 4MB ARM 2 core. I'll have a look at recompiling it with 16MB. EDIT: Thanks to Dave's suggestion, I now have the Pi CoPro reporting 16MB from BAS135. Still can't get the PDP-11 emulator working though as it's now hanging when trying to boot t...
by RobC
Fri Nov 10, 2017 2:55 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

I've been looking at building the PDP11 emulator for the native Pi copro and have now figured out how to build C executables for it and have the stubs library connected up. Unfortunately, the emulator needs more than the current limit of 2MB as it is complaining that it can't allocate enough memory ...
by RobC
Thu Nov 09, 2017 5:52 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Boydie wrote:Is it compiled for arm1 or arm2? ie Will it work on a real arm evaluation system?

ARM2. I might be able to build it for ARM1 with an early version of the Norcroft compiler - it gave a lot of errors when I tried but it wouldn't be impossible to port.
by RobC
Thu Nov 09, 2017 4:14 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Ah, what will be happening is that the Unix console will be sending anything it doesn't understand to the the system the emulator is running on. Which in this case is ultimately the BBC VDU, so by the accident of you running the PDP11 emulator on a system with the BBC VDU drivers, you are sending t...
by RobC
Thu Nov 09, 2017 4:09 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

I am guessing you built in for the 26 Bit ARM 2 mode? Yes for the ARM Evaluation system version but the ARM7TDMI version is 32-bit. It is much faster on the ARM7TDMI copro and borders on usable. Maybe on the Pi CoPro you could build it for the Native ARM mode. This would make it a lot faster ;) My ...
by RobC
Thu Nov 09, 2017 12:15 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

sweh wrote:Character 4 is the standard Unix EOF character; possibly it's being filtered out? Try doing VDU 19,0,&34,0,0,0 instead...

Spot on - &34 set it to blue (so did &14 and &24) so the OS is treating &04 differently.
by RobC
Wed Nov 08, 2017 3:39 pm
Forum: software: other
Topic: Setting up PANOS!
Replies: 47
Views: 2352

Re: Setting up PANOS!

I have a HD image with Panos (and loads of other 32016 software) installed.

PM me if you want a copy.
by RobC
Wed Nov 08, 2017 7:41 am
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

jgharston wrote:Is that using the ANSI VDU driver?

No.

The odd thing is that VDU 19,0,p| works for all other values of p apart from 4. Thinking about it, it's possible that the OS is replacing VDU 4 with some other behaviour - I'll try to do some more digging today.
by RobC
Tue Nov 07, 2017 9:36 pm
Forum: upcoming and recent events & exhibitions
Topic: London Show / Saturday 28th October 2017
Replies: 26
Views: 1266

Re: London Show / Saturday 28th October 2017

My work in progress centipede on the left, not sure about the one on the right, but Rob did have a series of pictures showing on his Nula some of the time. I think the picture is of Xenon 2 but it isn't a game port, it's one of the images from Simon's NULA gallery disks. (I had Simon's stuff runnin...
by RobC
Tue Nov 07, 2017 1:49 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Thanks Dominic - it's fun to see these minicomputer OSs come to life on a Beeb... (Just realised that I forgot to reply to your e-mails about Flex! Sorry - the period just before the London show was very busy.) I think I'll have a look at putting it on the Pi copro next but that'll probably require ...
by RobC
Mon Nov 06, 2017 10:26 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

I usually leave it logged on as boot as then its in single-user mode and a lot of multi-user multi-tasking is turned off. Thanks - not sure why things like 'ls' were quicker when I logged in as 'dmr' though. A quick fiddle suggests stty erase '^?' does it. The confusing thing is that it isn't echoe...
by RobC
Mon Nov 06, 2017 8:06 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2474
Views: 174024

Re: Worth Taking a Look At

The A5000 I had at home always felt faster than the A540 at work, I had always assumed it was RAM bandwidth. I think memory runs at the same speed on the A540 and A5000 (12MHz). I don't really notice any difference between my 25MHz R260 (under RISC OS) and 25MHz A5000. My A540 has been upgraded so ...
by RobC
Mon Nov 06, 2017 6:49 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

BigEd wrote:JGH's PDP-11 Basic runs in Unix? I am surprised! Or did you have to do some kind of port? Or am I confused?

Yes - it runs on the copro or on real hardware from Unix:
http://mdfs.net/Software/PDP11/BBCBasic/

I just transferred the binary with UxFiler and called it from the Unix shell.
by RobC
Mon Nov 06, 2017 6:37 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

I've now got this running on Sprow's ARM7TDMI copro. It's much more responsive and borders on the usable (at least with my GoSDC - I haven't tried it with the DC yet). It's certainly comparable to my A540. Logging on as user dmr gives access to a quicker shell which is fairly responsive (relatively ...
by RobC
Sat Nov 04, 2017 1:18 pm
Forum: hardware
Topic: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.
Replies: 25
Views: 775

Re: Running DosPlus (version 2.1) with Raspberry Pi 80286 processor emulator on BBC master 128.

This isn't the one that has my name as the registeree is it? Can we please create another version and distribute that if it is? Don't believe so - this was installed on to my DC from my original M512 and Panos floppies. (Out of interest, how do you check the registration details?) Please could I re...
by RobC
Sat Nov 04, 2017 12:38 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Is this supposed to work with the Arm Co-Pro emulation in BeebEm ? I'd only tested it on the Pi Copro and matchbox - it hangs on the matchbox (possibly due to lack of memory). Just tested it now and I get the same error in BeebEm - don't know whether it's a problem with its emulation or an issue wi...
by RobC
Sat Nov 04, 2017 9:19 am
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

The next step is clearly to run PDP11 BBC BASIC on it. Now that would be funny! I'll have to give it a go :D Wait... this is a PDP-11 running on an emulator framework, ported to the ARM Second processor, which is in turn being emulated by a bit-banging Raspberry Pi. I can't help feeling there must ...
by RobC
Fri Nov 03, 2017 10:57 pm
Forum: hardware
Topic: Unix on the Beeb
Replies: 36
Views: 1010

Re: Unix on the Beeb

Does v7 run natively on the PDP-11 copro? I don't think so but I believe that JGH has been looking at getting Unix running on it: http://mdfs.net/Software/PDP11/BBCUnix/ Seems like cutting SIMH out of the equation would be the way to success Yes, although this was only a bit of fun after getting th...

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