Search found 175 matches

by scruss
Tue Apr 07, 2020 11:55 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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 3:54 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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 3:41 pm
Forum: off-topic
Topic: Which retro calculator is best?
Replies: 29
Views: 689

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 5:09 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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 3:23 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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 6:18 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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
Thu Apr 02, 2020 11:33 pm
Forum: hardware
Topic: Looking for 3D printing tips
Replies: 16
Views: 364

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: software: other
Topic: Two more Pi programs from Valentin Albillo
Replies: 11
Views: 443

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: software: other
Topic: Two more Pi programs from Valentin Albillo
Replies: 11
Views: 443

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: software: other
Topic: BCPL Calculations Package Manual Scanned?
Replies: 5
Views: 276

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: 94
Views: 8422

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: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC VI for Linux with SDL: V1.22.4 released
Replies: 874
Views: 55646

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: 94
Views: 8422

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: 2048

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: software: other
Topic: BBC Basic Bot (on twitter)
Replies: 20
Views: 1045

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: hardware
Topic: 21st Century BBC Micro?
Replies: 14
Views: 698

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: 615

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: 2114

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: hardware
Topic: How many 8bit beeb basic machines
Replies: 19
Views: 627

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: 879

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: hardware
Topic: Three button, non-scrollwheel, optical mice?
Replies: 5
Views: 480

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: 2048

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.
by scruss
Tue Nov 26, 2019 12:08 am
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC VI for Linux with SDL: V1.22.4 released
Replies: 874
Views: 55646

Re: Matrix Brandy BASIC VI for Linux with SDL: V1.22.1 released

The 38h possibly comes from the codes used by xterm to switch the cursor between the VT (text) window and the Tek window. I suspect the tek4010 emulator won't recognise them as there's nothing for it to switch to. I had a chat with Rene Richarz, the author of Tek4010, about this and he notes that t...
by scruss
Thu Nov 21, 2019 2:01 pm
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC VI for Linux with SDL: V1.22.4 released
Replies: 874
Views: 55646

Re: Matrix Brandy BASIC VI for Linux with SDL: V1.22.1 released

Edit: I've just checked in a couple of new demos, sine and spiral, which will use the normal graphics in the SDL build, and Tektronix graphics in tbrandy. There's no path switching in the code, it just switches on TekEnabled then goes ahead with regular BASIC graphics commands. Ooh, nicer still! So...
by scruss
Tue Nov 19, 2019 3:58 am
Forum: introduce yourself
Topic: Another Hi from Glasgow
Replies: 12
Views: 443

Re: Another Hi from Glasgow

Welcome!

I used to live in Kirkintilloch and worked in the dictionaries division at HarperCollins in Bishopbriggs.
by scruss
Tue Nov 19, 2019 3:55 am
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC VI for Linux with SDL: V1.22.4 released
Replies: 874
Views: 55646

Re: Matrix Brandy BASIC VI for Linux with SDL: V1.22.1 released

Neat!

I made this by running tbrandy in an xterm, and entering:

Code: Select all

LOAD "examples/tekspiral"
SYS "Brandy_TekEnabled", 1
RUN
Screenshot from 2019-11-18 22-28-23.png
tekspiral from the Matrix Brandy examples folder
I also ran it through rricharz/Tek4010 for moar Tek goodness : https://www.youtube.com/watch?v=3Ew3O4xFp0Y
by scruss
Thu Oct 24, 2019 3:17 pm
Forum: emulators
Topic: Latest version of Riscos on PC via Rpi emulator
Replies: 3
Views: 458

Re: Latest version of Riscos on PC via Rpi emulator

I mean, if you really want to do this you could emulate a Raspberry Pi under QEMU and run it from there. That's quite a lot of work, and doesn't get you any further than RPCEmu.
by scruss
Mon Oct 14, 2019 12:52 am
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 37
Views: 1503

Re: Calculating digits of Pi in Basic

Timing just the calculation, 50 digits in 44 seconds: Or in BBC BASIC for SDL 2 on a i7-4790K @ 4.00GHz, 4400 digits in 44 seconds. Couldn't get it to run at all in Matrix Brandy on the same machine. It failed with Address exception at line 100 . I suspect a 64 bit problem, as it seems to run fine ...
by scruss
Wed Oct 09, 2019 2:12 pm
Forum: hardware
Topic: Digital Tape Deck
Replies: 22
Views: 1590

Re: Digital Tape Deck

Yes, the low memory warning comes up with any sketch that's beyond a trivial size. Best ignored.
by scruss
Wed Oct 09, 2019 2:10 pm
Forum: acorn atom and system
Topic: Anyone tried to port Atom Basic to py65?
Replies: 1
Views: 310

Re: Anyone tried to port Atom Basic to py65?

For a really simple 6502 board, I don't think you can do much simpler than Lee Hart's 6502 40th Anniversary Computer Badge. Lee's updating it now as the original LED display is no longer available, and the original suffered from having no input beyond serial.