Search found 833 matches

by crj
Tue Jun 12, 2018 12:01 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 81
Views: 2809

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

helpful wrote:
Tue Jun 12, 2018 1:13 am
the attendee list (actually a table list)
That's a good point. I won't need a table. But I'm still interested in the pay-for-two-days-get-three deal on access to the museum, the out-of-hours socialising, etc. (-8
by crj
Mon Jun 11, 2018 11:42 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 81
Views: 2809

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

Eeek! Sorry, I've been away from the forums for a bit. Many thanks to Boydie for prodding me.

Yes, I'll definitely take a place, please!
by crj
Sun May 13, 2018 7:20 pm
Forum: general
Topic: Maplin Electronics in administration
Replies: 110
Views: 5797

Re: Maplin Electronics in administration

I stuck my nose through the door today. They're still being ridiculously optimistic price-wise. A lot of what's left I wouldn't buy at anything less than 80% discount, but it's only been reduced by 50% so far. Even now, they seem to have their heads in the sand about just how cheaply commodity stuff...
by crj
Tue Apr 24, 2018 4:41 pm
Forum: general
Topic: Today I received.....
Replies: 4742
Views: 320349

Re: Today I received.....

Finally, some melatonin:
DSC_0618.JPG
I'm hoping this will fix my sleep disturbance and give me my life back. If it does, hopefully that in turn will mean more energy devoted to retrocomputing projects. (-8
by crj
Wed Apr 18, 2018 5:24 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

Also, remember to translate between BBC filename characters and WinDOS characters Incidentally, it's not stated but I assume it is understood that character 96 in Acorn filenames always maps to ASCII/Unicode character 96 (i.e. backtick) regardless of whether the file is coming from 8-bit or 32-bit ...
by crj
Wed Apr 18, 2018 5:00 pm
Forum: for sale / freebies
Topic: Free, via Twitter: Beeb stuff in Canterbury
Replies: 16
Views: 1142

Re: Free, via Twitter: Beeb stuff in Canterbury

Thanks ever so much, mildlydiverting, for keeping this kit in circulation, especially at such a difficult time for you. Heartily agreed. Thank you for deciding this is worth some precious spoons! If more old computers got rehomed and fewer got sent to landfill by house clearance companies, the worl...
by crj
Wed Apr 18, 2018 4:40 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

Also, remember to translate between BBC filename characters and WinDOS characters: # <-> ? . <-> / $ <-> < ^ <-> > & <-> + @ <-> = % <-> ; And special case, as it's nonreversable: WinDOS SPC -> BBC _ As a related headache, what happens when we encounter an Acorn file called CON, LPT1 or similar? Is...
by crj
Wed Apr 18, 2018 4:37 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

Any alternatives must start with "what happens with existing systems". So, going back 25 years, "what happens when I use an Acorn system to copy a file from an Acorn filesystem to a DOS disk?" Which, in terms of filenames is: the filename is as close to identical as possible. So, dragging HELLO fro...
by crj
Wed Apr 18, 2018 4:33 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

Even if INF files don't make sense, either now or then, it's been around for more 25 years and any system that doesn't support them will have the failing that it doesn't support them. Agreed. As I said: I mean yes, if it's become a de facto standard it has to be supported for interface purposes It ...
by crj
Wed Apr 18, 2018 3:07 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

I wonder if we can create something that's backwards compatible. I wonder how many tools currently read the _second_ line of the INF file? OK. Here's the first difficulty we encounter with that idea: what is the "second line" of an INF file? Specifically, does the file use Acorn line endings, host ...
by crj
Tue Apr 17, 2018 10:54 pm
Forum: for sale / freebies
Topic: Free, via Twitter: Beeb stuff in Canterbury
Replies: 16
Views: 1142

Re: Free, via Twitter: Beeb stuff in Canterbury

Quick update on this: the National Videogame Arcade guys visited and took the software, books etc, but I now have about... ten BBC Bs, four masters, and a pile of floppy drives / monitors (3 Cubs, plus other misc ones...) Joining the dots, I'm the "anotherclive" you responded to on Twitter. (-8 I h...
by crj
Tue Apr 17, 2018 10:46 pm
Forum: hardware
Topic: RGB to Component Video
Replies: 5
Views: 440

Re: RGB to Component Video

Careful. You say "RGB Component Phono connectors", but component video over phono (RCA) connectors is seldom RGB. It's much more common for it to be the YPbPr format which is favoured in countries with NTSC. If you're certain you really want RGBS on phonos, you can make up a lead to do that using ju...
by crj
Tue Apr 17, 2018 10:37 pm
Forum: general
Topic: Today I received.....
Replies: 4742
Views: 320349

Re: Today I received.....

If you want the contents of the EPROM chip with the uncovered window not to decay, it's best to cover the window with either a paper label or black insulation tape. Yeah I noticed that. I'm guessing that whatever is/was on it wasn't that important to the previous owner Actually, wouldn't an EPROM b...
by crj
Tue Apr 17, 2018 2:49 am
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3193

Re: New Disk Image Editor

Anyone who uses C, C++, or other languages complied to those languages such as Eiffel already gives up any right to talk about proper engineering practice [...] Anyone who's not autistic will understand there is always tradeoff between perfection (which in reality doesn't exist) and practicality in...
by crj
Sat Apr 14, 2018 11:15 pm
Forum: off-topic
Topic: LOL DESCRIPTION
Replies: 606
Views: 61344

Re: LOL DESCRIPTION

The computer end of the lead is a five pin plug so should be compatible with any of the 1980's home computers that had a three, five or seven pin DIN socket.
A 5-pin DIN plug "should" fit a 3-pin DIN socket? Really now?
by crj
Thu Apr 12, 2018 11:53 pm
Forum: hardware
Topic: Soldering and Hotair station options
Replies: 38
Views: 1762

Re: Soldering and Hotair station options

After one 40 pin DIP I'd had enough and bought this: http://cpc.farnell.com/duratool/d00672/desoldering-station-uk-eu-plug/dp/SD01384?mckv=sZ5p7NarZ_dc|pcrid|224654335881|kword||match||plid||pid|SD01384|&CMP=KNC-GUK-CPC-SHOPPING&gclid=EAIaIQobChMIoMf6j4Ct2gIVqbXtCh1GjQnlEAQYASABEgKhYfD_BwE Ooh! Tha...
by crj
Wed Apr 11, 2018 1:14 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 1787

Re: Acorn files on other platforms

I agree that Python is a pretty good choice for anything amenable to being coded in it. But, although MicroPython is available for embedded systems, I'm not sure it's up to running a 6502 emulation at a sensible speed with small RAM footprint. Meanwhile, C has been around for almost half a century a...
by crj
Wed Apr 11, 2018 12:32 pm
Forum: programming
Topic: Keyboard Buffer
Replies: 6
Views: 439

Re: Keyboard Buffer

It might be more polite and more robust to insert the keystrokes into the buffer. That will work even if someone's installed different buffering code, and means what you insert ends up queued behind anything that's already pending. You could hook into the RTI instruction. If pasting then, before exe...
by crj
Wed Apr 11, 2018 12:17 am
Forum: wanted
Topic: B+128 keystrip & upper case
Replies: 30
Views: 1190

Re: B+128 keystrip & upper case

daveejhitchins wrote:not sure what the SG stands for, though
"Slightly grimy"? That way it would better match 35-year-old computers. (-8<
by crj
Wed Apr 11, 2018 12:14 am
Forum: programming
Topic: Keyboard Buffer
Replies: 6
Views: 439

Re: Keyboard Buffer

It's neither key codes nor ASCII. Things are a tiny bit more complicated than that. Most things in the keyboard buffer itself (the thing you insert into using *FX138) are simple ASCII characters or control codes. They're not keyboard raster codes, and considerations like SHIFT, CTRL, SHIFT LOCK and ...
by crj
Tue Apr 10, 2018 11:35 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 1787

Re: Acorn files on other platforms

This is all a confusing mess. I'll start by making a few general observations, then get more specific. Firstly, and most importantly, as a general principle an archiving tool's main job is to preserve as much information as possible. If, during the path from source filing system, through archiving, ...
by crj
Tue Apr 10, 2018 1:10 am
Forum: other vintage computer hardware, software and games
Topic: C64 fault
Replies: 7
Views: 535

Re: C64 fault

That's a great-looking resource! Need an Acorn version of it ... :D Unfortunately, ten times as many C64s were sold as Beebs. That means (a) they have a bigger pool of failed machines to draw from in getting screenshots and (b) they have more people in the community who want the resource, which pro...
by crj
Tue Apr 10, 2018 12:56 am
Forum: hardware
Topic: BBC Micro cut-out space on left hand side of keyboard
Replies: 11
Views: 675

Re: BBC Micro cut-out space on left hand side of keyboard

I think the reason speech synthesis on the Beeb failed to thrive, even the Computer Concepts and Superior Software offerings, is that they were too expensive for a toy, but not good enough for serious professional use. If you were, for example, Stephen Hawking you'd shell out the US$4,000 for a DECt...
by crj
Mon Apr 09, 2018 2:42 am
Forum: software: other
Topic: Any short type-ins for unattended Beebs?
Replies: 102
Views: 4652

Re: Any short type-ins for unattended Beebs?

Oh, there's also Rheolism for the Archimedes, of course.
by crj
Mon Apr 09, 2018 2:33 am
Forum: software: other
Topic: Any short type-ins for unattended Beebs?
Replies: 102
Views: 4652

Re: Any short type-ins for unattended Beebs?

10 MODE 4 20 DIM X%(3),Y%(3) 30 X%(1)=32:Y%(1)=32 40 X%(2)=1248:Y%(2)=32 50 X%(3)=640:Y%(3)=992 60 X%=RND(1280):Y%=RND(1024) 70 REPEAT 80 N%=RND(3) 90 X% = (X%+X%(N%))/2 : Y% = (Y%+Y%(N%))/2 100 PLOT 69,X%,Y% 110 UNTIL FALSE Spoiler: it produces this , which often surprises people. (-8 Disclaimer: ...
by crj
Mon Apr 09, 2018 2:12 am
Forum: general
Topic: Do your family and friends 'get it'?
Replies: 25
Views: 1075

Re: Do your family and friends 'get it'?

I hang around Cambridge geek circles, so many of my friends not only "get it" but are actively involved in such things themselves. Cambridge has that kind of eerie small-world quality that means I bump into Centre for Computing History staff at parties. (And the garage that maintains my car occupies...
by crj
Sun Apr 08, 2018 10:38 pm
Forum: hardware
Topic: Reverse Tube - an amusing idea
Replies: 8
Views: 605

Re: Reverse Tube - an amusing idea

Acorn had a HostFS podule that contained a ULA during development of the Arc to allow use of the BBC's drives — there’s a schematic and dump of the ROMs on here somewhere. Mmm. And between the Springboard and the Archimedes with the Tube Podule, there was the "A500 Second Processor". I donated an A...
by crj
Sun Apr 08, 2018 10:34 pm
Forum: hardware
Topic: Reverse Tube - an amusing idea
Replies: 8
Views: 605

Re: Reverse Tube - an amusing idea

...

!

Oculus Rift attached to two Beebs. Make one of them a Master; run a mashup of the Tube and Master versions of Elite, so it renders stereoscopically across both machines. If it worked, that would be easily the most awesomely preposterous abuse of retrocomputing I've ever encountered.
by crj
Sun Apr 08, 2018 10:30 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 1787

Re: Acorn files on other platforms

If you haven't already seen it, you might want to take a look at py65 . That's one of the things I'm aware of, but confess I've not investigated thoroughly. I'm not certain it's an especially good fit for what I'm up to, though it could be (yet) another thing to look at when trying to determine cor...
by crj
Sun Apr 08, 2018 1:43 am
Forum: hardware
Topic: Reverse Tube - an amusing idea
Replies: 8
Views: 605

Re: Reverse Tube - an amusing idea

Then there's the fact that a limit amount of parallel processing was only part of the reason to have a 2nd processor. ... This idea isn't a way to get the normal benefits of a second processor. People who want that can indeed use a normal second processor or, nowadays, PiTubeDirect. What I'm thinki...