Search found 213 matches

by scruss
Fri Apr 24, 2020 7:12 pm
Forum: development tools
Topic: bbcim problems on linux
Replies: 8
Views: 424

Re: bbcim problems on linux

It compiled and read disk images on my Ubuntu x86_64 system, but won't add anything or even ID known-good disk images as disk images. It also gives lots of warnings like Unable to open plop.dsd.dsk when successfully reading plop.dsd
by scruss
Sun Apr 19, 2020 4:54 pm
Forum: off-topic
Topic: Printing on Thingiverse
Replies: 13
Views: 776

Re: Printing on Thingiverse

Time and care is what's needed with these. Oh, and blue threadlock, if you can be bothered. The first printer I built was always a bit skewed. 3-4 point levelling is only a pain until the device settles, then it's something to do every few months. I'm still amazed to find 3-point levelling on really...
by scruss
Sun Apr 19, 2020 1:21 am
Forum: 8-bit acorn hardware
Topic: What printer are you still using?
Replies: 14
Views: 449

Re: What printer are you still using?

ThinkJets are nice. I guess there must be clever ways of refilling them by now. I remember the Diconix I had (a badged Thinkjet) would make quiet splat! noises as the ink hit the paper. I have (and use) an Oki ML320. They are indestructible. The one printer I haven't got going very well (although I ...
by scruss
Sun Apr 19, 2020 1:16 am
Forum: off-topic
Topic: Printing on Thingiverse
Replies: 13
Views: 776

Re: Printing on Thingiverse

That looks like amazing quality from a Huxley. You must have built it very straight and rigid
by scruss
Fri Apr 17, 2020 12:14 am
Forum: other vintage computer hardware, software and games
Topic: "Plotpourri" graphics demos in Basic for Apple II
Replies: 20
Views: 2536

Re: "Plotpourri" graphics demos in Basic for Apple II

Thanks! That did make it a lot faster. Here's a JSBeeb version: https://bbc.godbolt.org/?autorun&loadBasic=https://gist.githubusercontent.com/scruss/a08020275183b928f16262d3cff66ae0/raw/49d6cc7efda65ceb71a21ba5c9eebc7e9c7c16cc/PLOTPOURRI2-BRANDY.bas or if you just want the source: https://gist.githu...
by scruss
Tue Apr 14, 2020 3:30 pm
Forum: 8-bit acorn software: other
Topic: Cambridge packet radio
Replies: 3
Views: 465

Re: Cambridge packet radio

This might have it: Amateur Radio (19xx)(-)(TBI-71).ssd.

But it's hard enough to find another AX25 station to relay through these days, let alone a non-standard protocol.

73 de VA3PID
by scruss
Tue Apr 14, 2020 3:18 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

If they can fit your part into their MJF printer, then it's perfect. The process is high-detail and generally accepts paint/primer. I think it may be slightly machinable, too. So then I did a bit more shopping around, and the prices keep getting lower! I found a firm called Midlands3d which can prin...
by scruss
Mon Apr 13, 2020 5:30 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

If you can get MJF for forty quid, go for it. It's very good indeed. That was the technology that I quoted nearer two hundred further up.

As long as the MJF printer can do the size and there isn't an additional charge for weight, I think you've found the place to do cheap case rebuilds. Bravo!
by scruss
Wed Apr 08, 2020 12:55 am
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

Or just export the model as an STL then load it up into Meshlab and look for "Non-manifold edges" (there's a view option somewhere that does that). Or just get Netfabb Online to fix it. It may well be fine. Thanks! It's fun to work for that charity. Assistive gaming is a big part of what we do, so w...
by scruss
Tue Apr 07, 2020 4:54 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

Well, if you need the model finished up, checked and exported, let me know. 3D printing is my job, for this assistive technology charity . Most manufacturers are on the optimistic side when quoting bed sizes, and printing right up to the mechanical limits can end up in warped prints (the heated bed,...
by scruss
Tue Apr 07, 2020 4:41 pm
Forum: off-topic
Topic: Which retro calculator is best?
Replies: 29
Views: 963

Re: Which retro calculator is best?

compet361nixies.jpg That's the display from my Sharp Compet 361 Desk Calculator , circa 1969. No scientific functions, but you can persuade it to produce square roots. It uses its own input logic - neither algebraic nor RPN - which makes it a bit special to use. The red LED display TI-30 might win....
by scruss
Mon Apr 06, 2020 6:09 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

So I mocked up something roughly the size and volume of the front of a Master Compact. Windows Print 3D estimated £185, but that was using sintered polyamide. It won't quote for something that large in ABS. Loading the sorta-kinda model into Cura - a popular 3d slicer - and selecting an Ender 5+ as ...
by scruss
Mon Apr 06, 2020 4:23 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

… sending emails in French to a country which clearly doesn't use that language is weird. Especially as they don't include any other languages in these worldwide emails. It's complicated. French is an official language federally here. If your company has its HQ in Quebec (the only province with Fre...
by scruss
Sun Apr 05, 2020 7:18 pm
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

… Then I realised that you just mean draught, as in gust of wind, but with the US spelling! :D 🇨🇦, please. We have very distinct spelling: we have colour like 🇬🇧, tire (as in 🚲, not 🥱) like 🇺🇸, but yogourt like no-one else. I guess I once knew how to spell draft your way, as when I was living in 🏴󠁧...
by scruss
Fri Apr 03, 2020 12:33 am
Forum: 8-bit acorn hardware
Topic: Looking for 3D printing tips
Replies: 28
Views: 898

Re: Looking for 3D printing tips

The overall width might be a problem: most 3d printer beds are only 220–250 mm across. Large ABS prints need an enclosed printer, as it warps and shrinks terribly if there's a draft. Large enclosed printers are not cheap. ABS might work. If 3D printed, it tends to be less rigid than injection moulde...
by scruss
Sat Mar 21, 2020 10:08 pm
Forum: 8-bit acorn software: other
Topic: Two more Pi programs from Valentin Albillo
Replies: 11
Views: 594

Re: Two more Pi programs from Valentin Albillo

okay, so missing the odd multiple detail blunted my message a bit, but it's really only doing a simple root finding. It's going to appear to converge at times roughly cubically because the sine curve is roughly cubic. SIN is slightly more expensive than ATN (on a BBC Micro, at least) so we don't gai...
by scruss
Sat Mar 21, 2020 6:42 pm
Forum: 8-bit acorn software: other
Topic: Two more Pi programs from Valentin Albillo
Replies: 11
Views: 594

Re: Two more Pi programs from Valentin Albillo

It's neat, but it's not doing anything magic. All it's doing is exploiting the fact that sin π = 0 . If you start the program with P > π, you'll notice it converges on the nearest multiple of π: 10 P=RND(100) 15 PRINT "P= ",P 20 FOR I=1 TO 5 30 P=P+SIN(P) 40 PRINT I," ",P," ",P/PI 50 NEXT with three...
by scruss
Thu Mar 19, 2020 12:42 am
Forum: 8-bit acorn software: other
Topic: BCPL Calculations Package Manual Scanned?
Replies: 5
Views: 374

Re: BCPL Calculations Package Manual Scanned?

is this a nice way of ping danielj, who said he'd start scanning it a couple of years ago?
by scruss
Sat Mar 14, 2020 8:00 pm
Forum: off-topic
Topic: New Acorn 8bit? Should there be one?
Replies: 95
Views: 9129

Re: New Acorn 8bit? Should there be one?

RISC OS isn't even on the download page any more. Err, yes it is, just below Ubuntu Mate and OSMC. It's also one of the options in the NOOBS download. My mistake. I thought they'd taken taken it down. It's not in the new Imager app, and it's listed below a whole bunch of OSs that don't even work an...
by scruss
Sat Mar 14, 2020 7:51 pm
Forum: classic languages (e.g. BASIC) on non-acorn platforms
Topic: Matrix Brandy BASIC VI for Linux with SDL: V1.22.5 released
Replies: 1046
Views: 61661

Re: Matrix Brandy BASIC VI for Linux with SDL: V1.22.4 released

… Building on the Raspberry Pi on the other hand is fine with debug information, but ‘make nodebug’ fails with the compiler complaining it cannot find ’SDL.h’, even though compiling with debug info is fine. I’ll admit I don’t have much experience compiling from source, so any help is appreciated! Y...
by scruss
Sat Mar 14, 2020 3:05 am
Forum: off-topic
Topic: New Acorn 8bit? Should there be one?
Replies: 95
Views: 9129

Re: New Acorn 8bit? Should there be one?

I think that's a little more than a Small Matter of Programming. RISC OS still doesn't do partitions bigger than 2GB and its understanding of wifi is slim to none. Its tight event loop turns most Raspberry Pis into very tiny space heaters. I remember when the Raspberry Pi came out, the Foundation wa...
by scruss
Sat Feb 29, 2020 3:39 am
Forum: off-topic
Topic: Odd Peripheral Goings-On With RPi4
Replies: 63
Views: 2363

Re: Odd Peripheral Goings-On With RPi4

The Foundation really doesn't recommend overclocking Raspberry Pi 4s at all. If it's unstable, it's something you did, is their line.

Firefox ESR is nice on the Raspberry Pi 4.
by scruss
Sun Feb 23, 2020 6:08 pm
Forum: 8-bit acorn software: other
Topic: BBC Basic Bot (on twitter)
Replies: 22
Views: 1395

Re: BBC Basic Bot (on twitter)

This one's amusing: 0MO.2:F=1:Y=512:REP.:N=(N MOD4)+1:GC.0,N:MOVE0,Y:DR.1280,Y:Y=Y-F:F=F*1.2:U.Y<0 1GC.0,5:F.I=-8.5TO8.5:MOVE640+I*75,512:DR.640+I*220,0:N.:MOVE0,512:DR.1280,512 2C.6:P. TAB(2,11);"THIS IS THE ONLY":P." WAY I TWEET NOW." 3V.19,N,0,0,0,0:N=(N MOD4)+1:V.19,N,5,0,0,0:I=INKEY(12):G.3 Al...
by scruss
Sun Feb 23, 2020 5:17 am
Forum: 8-bit acorn hardware
Topic: 21st Century BBC Micro?
Replies: 14
Views: 811

Re: 21st Century BBC Micro?

Richard Russell wrote:
Sat Feb 22, 2020 10:04 pm
For example … they implied that BBC BASIC would be available, but that didn't happen (in Raspbian) until I ported my version some years later.
I don't think they quite realized how dependent RISC OS is on code that won't run on new ARMs.
by scruss
Sat Feb 15, 2020 4:52 am
Forum: off-topic
Topic: Regex for UK Telephone Numbers
Replies: 19
Views: 809

Re: Regex for UK Telephone Numbers

I'm pretty sure I'm not dealing with any old area codes before the extra 1 was introduced though. That would likely be impossible to regex. Some cities had special short codes that allowed nearby but not quite local towns to be dialled at local rates. From Glasgow, "32" would get you East Kilbride ...
by scruss
Tue Jan 07, 2020 2:51 pm
Forum: off-topic
Topic: What has happened to Firefox add-ons?
Replies: 37
Views: 2382

Re: What has happened to Firefox add-ons?

I'm told that Firefox Quantum builds and runs quite well on a Raspberry Pi 4, but I can't seem to find a build to point you to on Raspbian Stretch. Privacy Badger, Facebook Cntainer and UBlock Origin should block most trackers. Changing user agent is a little like rearranging the deckchairs on the T...
by scruss
Sun Jan 05, 2020 3:43 pm
Forum: 8-bit acorn hardware
Topic: How many 8bit beeb basic machines
Replies: 19
Views: 735

Re: How many 8bit beeb basic machines

I suspect the answer is unlikely to be resolved, as the actual number of units sold will only have been known by the respective companies. … The chances of us finding factual information on this are very, very slim. Yes. The best we might do is a German tank problem analysis on serial numbers. And ...
by scruss
Sat Dec 28, 2019 5:03 pm
Forum: other vintage computer hardware, software and games
Topic: The C64
Replies: 15
Views: 1036

Re: The C64

Disk compatibility should be excellent, 'cos they used VICE but didn't credit the developers. I'm sure the choice of a custom A20 board seemed like a good idea at the time - but again, the developers benefited greatly from open-source hardware like the A20-OLinuXino boards.
by scruss
Wed Nov 27, 2019 4:12 pm
Forum: 32-bit acorn hardware
Topic: Three button, non-scrollwheel, optical mice?
Replies: 5
Views: 523

Re: Three button, non-scrollwheel, mice?

The Lenovo Scrollpoint Mouse (31P7405) has a residual centre button. The scrollpoint pip in the middle is ignorable, especially if your application doesn't know about X and Y scrolling. It's also fairly stiff to actuate, so may not scroll even if accidentally biffed. They're occasionally available s...
by scruss
Tue Nov 26, 2019 2:57 pm
Forum: off-topic
Topic: Odd Peripheral Goings-On With RPi4
Replies: 63
Views: 2363

Re: Odd Peripheral Goings-On With RPi4

BeebMaster wrote:
Tue Nov 26, 2019 10:38 am
Next to look at is if I can use a GPIO pin to revive from its shutdown-but-still-powered-on state without having to power it off and on again.
This might help: GLOBAL_EN must be shorted to ground to boot. It's a momentary contact that should restart the processor.

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