Search found 843 matches

by crj
Tue Apr 10, 2018 11:35 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

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: 724

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: 806

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: 145
Views: 8648

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: 145
Views: 8648

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: 1335

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: 852

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: 852

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: 2213

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: 852

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...
by crj
Sun Apr 08, 2018 1:25 am
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

For what it's worth, I'm currently pursuing the idea of emulated 6502 code in a restricted environment as a way to implement filing systems. In the process, I'm trying to formulate a clean C++ emulator implementation based loosely on the one in PiTubeDirect, but taking advantage of generic coding te...
by crj
Sat Apr 07, 2018 3:28 pm
Forum: hardware
Topic: Reverse Tube - an amusing idea
Replies: 8
Views: 852

Reverse Tube - an amusing idea

A random idea that occurred to me... Tube ULA: 8 bytes of memory-mapped I/O Tube space in SHEILA on the Beeb: 32 bytes The logic required to connect a Tube ULA's host side to one Beeb normally, and the parasite side to &FEF0-7 on a second Beeb would be small and simple. (For added style, you'd inclu...
by crj
Thu Apr 05, 2018 8:54 pm
Forum: hardware
Topic: Running a beeb with no keyboard plugged in
Replies: 31
Views: 1182

Re: Running a beed with no keyboard plugged in

I've heard rumours that you can run without a keyboard if you unplug the System VIA (IC 3) though I've never tried it myself. As for the ROM problem: IC88 and IC101 are working; IC52 and IC100 are not? That means ROMs xx01 and xx11 are working, xx00 and xx10 are not. Assuming there is one root cause...
by crj
Thu Apr 05, 2018 8:28 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 583
Views: 52707

Re: Palettemate / enhanced video ULA with 4096 colours

That's a cheap clone which might or might not work. Fortunately, it's reasonably easy to get both USB and Blaster interfaces correct at the electrical level so it probably won't blow anything up!

The Terasic clones for about £40 seem to be the cheapest that people actually trust.
by crj
Thu Apr 05, 2018 8:23 pm
Forum: hardware
Topic: Soldering and Hotair station options
Replies: 38
Views: 2139

Re: Soldering and Hotair station options

Hey, at least that's down from the half a grand people had to pay for a Metcal iron a decade ago!
by crj
Thu Apr 05, 2018 1:15 am
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

A wild idea that's occurred to me: At first glance neither ADFS nor 1770 DFS need very much of the OS. If you emulated: 6502 CPU RAM at &0000-&02FF, &0D00-&1FFF The filing system ROM at &8000-&BFFF (no need for paging!) OS entry points at &FF00-&FFFF Floppy hardware in page &FE80-&FE87 Hard disc har...
by crj
Thu Apr 05, 2018 12:34 am
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

Ooh! Stylistically at least, if not in terms of completeness of implementation, that's much more like it. (-8
by crj
Wed Apr 04, 2018 10:13 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

None of this seems awfully hard to fix; you're right that Perl isn't the easiest language to work with, but adding these features to the existing, working code is still going to be much easier than rewriting the whole thing I'm not so sure of that. It's a 1,000-line Perl monolith which combines com...
by crj
Wed Apr 04, 2018 6:05 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

Are you aware of Stephen's mmb_utils? [...] They are written in perl, but run happily on Windows. I use these for the packaging phase in all of my projects. I don't know about Kieran, but I've glanced at them. While they may solve the specific, narrow problem of shoehorning some specific files into...
by crj
Wed Apr 04, 2018 2:14 am
Forum: off-topic
Topic: Bank Holiday
Replies: 25
Views: 1222

Re: Bank Holiday

I sent Mrs H out yesterday to grab some reduced chocolate eggs Mmmmm! I hope she found some! In recent years, supermarkets seem to have elected to have the Easter eggs vanish from shelves instead of sitting around discounted after Easter, presumably to encourage people to buy full-price eggs before...
by crj
Wed Apr 04, 2018 12:00 am
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

I hate that the name in the inf can override the filename on the host machine My instinct is that it's fine that it can override the host filename. Given the alternative is being sure that you have a reversible mapping between host filename and Acorn filename - a pretty tall order given how many di...
by crj
Tue Apr 03, 2018 4:39 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

Have you never opened a ZIP file on RISC OS? No, never! Back in the day I used NFS to my RISCiX server, and now my heart is in 8-bit retrocomputing. The reason I'm putting thought into RISC OS as well is that I recognise any solution has to work for both to enjoy widespread acceptance. Never notice...
by crj
Tue Apr 03, 2018 12:49 am
Forum: off-topic
Topic: My Wife
Replies: 39
Views: 2047

Re: My Wife

)-8
by crj
Tue Apr 03, 2018 12:47 am
Forum: hardware
Topic: Arduino Filestore - Code now available to download
Replies: 9
Views: 821

Re: Arduino Filestore - Code now available to download

I thought the RISC OS NetFS hacked the choice of library itself?
by crj
Tue Apr 03, 2018 12:42 am
Forum: hardware
Topic: Printing from the BBC Model B
Replies: 15
Views: 955

Re: Printing from the BBC Model B

No, you'd want a forwards serial to USB adapter. Serial... to..... USB. So the stuff goes from the serial port, goes through and adapter, and goes to a USB port. Stuff starts at the serial end, and as time advaces in the direction that time advances, it becomes USB stuff. A backwards serial to USB ...
by crj
Tue Apr 03, 2018 12:39 am
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 2213

Re: Acorn files on other platforms

Hmm. What tools support a 256Kbyte DFS image, though? It won't fit on a disc; can you make a .ssd file that big and have it work? The extension to ZIP is good to know about; I assumed ZIP files just tended to contain a .INF file alongside the actual file. For completeness, it looks like ZIP comes in...
by crj
Mon Apr 02, 2018 2:20 am
Forum: software: classic games
Topic: (OT?) What's that simple game with converging enemies?
Replies: 6
Views: 699

Re: (OT?) What's that simple game with converging enemies?

You say real-time, so this isn't it, but robots sounds like the turn-based version. It's been available since forever as one of the games on BSD unix systems.
by crj
Mon Apr 02, 2018 1:09 am
Forum: projects
Topic: Making reasonable progress with a Sudoku solver
Replies: 84
Views: 4985

Re: Making reasonable progress with a Sudoku solver

Note the code can go at &800 on a second processor; most of the OS is missing. (-8

(Actually, if you're running pure machine code without using BASIC or similar, you can start at &400 and use contiguous RAM all the way up to &F800!)
by crj
Mon Apr 02, 2018 1:05 am
Forum: hardware
Topic: RGB keyboard LEDs?
Replies: 26
Views: 1419

Re: RGB keyboard LEDs?

Excellent! (-8 Limor "Lady Ada" Fried has spoken a few times about the maker culture of today feeling very like the home computer revolution of the late seventies and early eighties. The kids who'd have been hacking in BASIC 40 years ago are now messing about with 3D printers and a pile of electroni...
by crj
Mon Apr 02, 2018 12:55 am
Forum: hardware
Topic: Printing from the BBC Model B
Replies: 15
Views: 955

Re: Printing from the BBC Model B

The BBC Micro can print via serial as well as parallel. That's almost certainly a better bet for bodging through to a modern printer. And I may be out of touch, but a few years ago, printers used to auto-detect between Postscript, PCL and plain text depending on the preamble of whatever you sent the...