Search found 1841 matches

by BigEd
Sun Jun 17, 2018 4:47 pm
Forum: stardot.org.uk
Topic: Post editing
Replies: 59
Views: 710

Re: Post editing

Generally, I like the idea of a grace period which allows quick early edits. I'd hope we could find a period which is long enough to work for everyone. And generally I don't like late edits, because some people will miss the update. It's nice for a post to be correct, but not so nice if people see o...
by BigEd
Sun Jun 17, 2018 3:39 pm
Forum: stardot.org.uk
Topic: Post editing
Replies: 59
Views: 710

Re: Post editing

I know it's a pain to tweak an installation (because it risks trouble at upgrade time) but making these 'edited 99 times' footers visible only to mods and admins might be a good story. I thought I could filter them out using my brain, but my brain says it can't do it. The really useful cases are the...
by BigEd
Sun Jun 17, 2018 8:17 am
Forum: programming
Topic: English wordlist checker
Replies: 2
Views: 94

Re: English wordlist checker

I like it! A cromulent idea. With some code for stemming you could do a bit better, I think: forming plurals and gerunds, with a list of irregular cases, so your filter needn't deal with a full vocabulary as-spelt-out.
by BigEd
Sun Jun 17, 2018 7:32 am
Forum: stardot.org.uk
Topic: Post editing
Replies: 59
Views: 710

Re: Post editing

I agree that the footer is a bit less useful now as a warning flag - although I'd normally not worry about edited posts, unless it's a heated argument. Cosmetic edits are always fine, of course, but if a few minutes has passed, adding a 'one more thing' might well be missed by people who got a notif...
by BigEd
Sun Jun 17, 2018 7:27 am
Forum: stardot.org.uk
Topic: Post editing
Replies: 59
Views: 710

Re: Post editing

I imagine this isn't an option, but in some forum software you get free edits for the first 10 minutes or so - after which the behaviour changes. There is a facility here called 'save draft' - presumably you can edit your draft... But is it annotated as an edit? Let's find out... OK saved and restor...
by BigEd
Sat Jun 16, 2018 9:43 pm
Forum: software: other
Topic: BBC Micro Compendium by Jeremy Ruston
Replies: 52
Views: 1433

Re: BBC Micro Compendium by Jeremy Ruston

Thanks for running that test!

It might be that both algorithms make a 1 or 2 ULP error on the same input argument: it looks like a complicated number when reduced to a ratio and printed in decimal, but perhaps it's a really simple number.
by BigEd
Sat Jun 16, 2018 5:25 pm
Forum: software: other
Topic: BBC Micro Compendium by Jeremy Ruston
Replies: 52
Views: 1433

Re: BBC Micro Compendium by Jeremy Ruston

It's nothing to write home about:
Basic 4r32 as shipped: sum is 2.80552831E-4, worst is 2.61333737E-5
by BigEd
Sat Jun 16, 2018 5:05 pm
Forum: software: other
Topic: BBC Micro Compendium by Jeremy Ruston
Replies: 52
Views: 1433

Re: BBC Micro Compendium by Jeremy Ruston

An interesting historical anecdote is that the Chebychev-optimisation of the coeffecients was carried out by a very early version of BBC BASIC (Z80) which at that stage had no transcendental functions at all! Effectively it bootstrapped-itself, without needing any external assistance from another l...
by BigEd
Sat Jun 16, 2018 2:20 pm
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 45
Views: 1445

Re: Using BBC BASIC to teach programming concepts in 2017

The phrase I've picked up is "computational thinking" - the aim being that kids should be prepared to live in a world where so much is mediated by software. It helps to have some idea about what kinds of things software can do, and can't do. How to use it, and how it fails. That's related to knowing...
by BigEd
Sat Jun 16, 2018 12:54 pm
Forum: other vintage computer hardware, software and games
Topic: From fractals, over the hills and far away...
Replies: 1
Views: 88

Re: From fractals, over the hills and far away...

Human knowledge is a fractal tree... it seems very worthwhile to keep exploring new branches!

Image
by BigEd
Sat Jun 16, 2018 12:26 pm
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

I did read through an issue of that when it was mentioned previously:
viewtopic.php?f=11&t=13699
(Edit: and as I recall it was pretty good)

(My other half is helping at a code club these days, but I'm not (yet) involved in any way.)
by BigEd
Sat Jun 16, 2018 12:18 pm
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

Smalltalk certainly has an excellent pedigree - if we didn't have the likes of python, perhaps that's where we'd head after the block languages?
by BigEd
Sat Jun 16, 2018 11:54 am
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

I've read good things about Logo, like children discovering for themselves how to tackle a program by breaking it into manageable pieces. And Logo is a Lisp . That has to be a good thing! (By which I mean, it's not a toy language, and it's not an ad-hoc language. More likely to help with good habits...
by BigEd
Fri Jun 15, 2018 10:34 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 99
Views: 5209

Re: RGB to HDMI using a Pi Zero and a small CPLD

Never too late with a software-based solution! Which is not to say that anything is possible, because there are timing constraints with updating the Pi's framebuffer.
by BigEd
Wed Jun 13, 2018 2:22 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 99
Views: 5209

Re: RGB to HDMI using a Pi Zero and a small CPLD

Mode 7 will always look retro!
by BigEd
Wed Jun 13, 2018 12:24 pm
Forum: stardot.org.uk
Topic: Has Stardot been purged from Google search?
Replies: 14
Views: 296

Re: Has Stardot been purged from Google search?

I'm not so sure. This is my test. Edit: ah, it's already revisited the index page of the forum - 36 mins ago - so with a bit of luck it will re-trawl the whole archive in due course. (Total posts 202796...) Edit: a little over an hour after that first hit, there's now one thread in the results. 1467...
by BigEd
Wed Jun 13, 2018 11:41 am
Forum: stardot.org.uk
Topic: Has Stardot been purged from Google search?
Replies: 14
Views: 296

Re: Has Stardot been purged from Google search?

(I suppose we might need to wait a week or more for a re-index?)
by BigEd
Wed Jun 13, 2018 10:03 am
Forum: software: other
Topic: Bugs in log and trig functions of Basic 4r32
Replies: 8
Views: 1191

Re: Bugs in log and trig functions of Basic 4r32

Just to note: the adventure continued, with some follow-up here:
viewtopic.php?p=201814#p201814
by BigEd
Wed Jun 13, 2018 9:15 am
Forum: stardot.org.uk
Topic: Has Stardot been purged from Google search?
Replies: 14
Views: 296

Re: Has Stardot been purged from Google search?

danielj wrote:
Wed Jun 13, 2018 9:12 am
Nope. It hasn't!
One of the top hits for site:stardot.org.uk is
"Board index - stardot.org.uk - Accept privacy policy"

I wonder if robots should not have to jump through that hoop? Or is this a red herring?
by BigEd
Wed Jun 13, 2018 8:59 am
Forum: software: other
Topic: Border tracing Mandelbrot generator for the Beeb
Replies: 78
Views: 5805

Re: Border tracing Mandelbrot generator for the Beeb

litwr wrote:
Tue Jun 12, 2018 10:35 am
I am curious what is the frequency of the 2nd CPU that gets us only 45 sec?
I think the answer is here:
B-Em in Master Turbo mode but with the 2nd proc running much faster
(Which is to say, it's in emulation, presumably on a very fast x86.)
by BigEd
Tue Jun 12, 2018 9:34 pm
Forum: projects
Topic: 640x512 50 fps Bad Apple on a B... how?!
Replies: 28
Views: 884

Re: 640x512 50 fps Bad Apple on a B... how?!

Wow!
by BigEd
Tue Jun 12, 2018 8:42 pm
Forum: software: other
Topic: Using BBC BASIC on a Homebrew Computer
Replies: 9
Views: 452

Re: Using BBC BASIC on a Homebrew Computer

JGH has written a couple of helpful documents on the topic:
http://mdfs.net/Software/BBCBasic/Porting/

You need very little, I think, to just get character input and output working to see life.
by BigEd
Mon Jun 11, 2018 2:46 pm
Forum: off-topic
Topic: ST micro ARM boards....
Replies: 10
Views: 391

Re: ST micro ARM boards....

The teensy boards are interesting too - especially as one of them uses an ARM chip which is 5V tolerant. Umm, except I notice now that they use NXP, not ST chips!
by BigEd
Sun Jun 10, 2018 10:35 am
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

There might be merit in taking the advanced students (for want of a better word) off into other diversions: but I'd rate Logo as more merit-worthy than Basic. I see there might be some kind of turtle graphics offering already. The Pi is just a small computer, in this context, so it's a fine place to...
by BigEd
Sun Jun 10, 2018 10:15 am
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

Thinking about it, I'd be strongly inclined to stick within the languages which are part of the syllabus - but collect ideas for mini-projects to be executed in those languages.
by BigEd
Sat Jun 09, 2018 9:02 pm
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

Here's an earlier attempt to collect some thoughts. I would suppose interactivity is important, although getting a program to produce something colourful or musical might also hit the spot. (Thing is, I'm not an educator.)
by BigEd
Sat Jun 09, 2018 3:36 pm
Forum: hardware
Topic: Monitors
Replies: 48
Views: 814

Re: Monitors

That's a very unexpected result indeed! (Unless somehow I've lost the plot... or does the machine have internal modifications???)
by BigEd
Sat Jun 09, 2018 3:13 pm
Forum: hardware
Topic: Monitors
Replies: 48
Views: 814

Re: Monitors

This, while possible, was a "right pox" as it involved waiting 15 minutes while the telly found the ATV channel (35) that the signal was coming through (while with the SCART the result was instantaneous): - P_20180609_114957_HDR.jpg - That is from the TV-out with my converter from the dustbin, as t...
by BigEd
Sat Jun 09, 2018 2:21 pm
Forum: general
Topic: Education, teachers and code clubs
Replies: 20
Views: 335

Re: Education, teachers and code clubs

Well done - I think codeclub is an excellent thing to be doing. My only thought is that RISC OS Pico is a good facsimile of the Beeb world, direct on the Pi and with no emulation. Instant boot to a BBC Basic prompt, the usual BBC Basic facilities but with much improved video MODEs, and of course an ...