Search found 763 matches

by paulb
Thu Oct 19, 2017 9:08 pm
Forum: hardware
Topic: 128K banked flash ROM cartridge
Replies: 9
Views: 212

Re: 128K banked flash ROM cartridge

Yeah, that's an interesting puzzle. The /FC73 line in the cartridge interface would be much more useful if it only went low for the currently selected cartridge. Exactly. /INFC and /INFD go low when the CPU is accessing &FCxx and &FDxx, so if you want to have your paging register at a diffe...
by paulb
Thu Oct 19, 2017 7:14 pm
Forum: hardware
Topic: 128K banked flash ROM cartridge
Replies: 9
Views: 212

Re: 128K banked flash ROM cartridge

Nice work! First time I've seen anyone using the &FC73 paging register... that'll be interesting to play with! Dave and I discussed other mechanisms for having a slot-specific paging register. Unfortunately (but understandably), the output enable signals are relevant only to accesses within the...
by paulb
Wed Oct 18, 2017 2:29 pm
Forum: software: other
Topic: Acornsoft P-System
Replies: 9
Views: 201

Re: Acornsoft P-System

Obligatory Chris's Acorns link: P-System Acornsoft/TDI (APP14)

It is the UCSD p-System running on the Beeb with 6502 second processor providing Pascal and Fortran compilers and the p-code runtime, of course.
by paulb
Mon Oct 09, 2017 9:03 pm
Forum: software: other
Topic: Turbo Cassette
Replies: 20
Views: 1868

Re: Turbo Cassette

by paulb
Thu Oct 05, 2017 4:55 pm
Forum: off-topic
Topic: Alternate Universe Micros...
Replies: 12
Views: 299

Re: Alternate Universe Micros...

Proton Rev C - BBC Micro Model B+ or B+ with third party shadow RAM extension... Z80 second processor for CP/M. Also Amstrad CPC 6128) One has to wonder what might have happened if Acorn and Amstrad had collaborated at different points in time. Having read "The Amstrad Story", referenced ...
by paulb
Thu Oct 05, 2017 11:01 am
Forum: off-topic
Topic: Alternate Universe Micros...
Replies: 12
Views: 299

Re: Alternate Universe Micros...

The interesting thing about this universe and Acorn's own activities in it is that there are actually plenty of "alternative" microcomputers in Acorn's portfolio. I cannot remember the source for this right now, but an apparent condition connected to offering Acorn the BBC contract based o...
by paulb
Mon Oct 02, 2017 3:59 pm
Forum: general
Topic: Which games from other platforms did you wish was on the BBC?
Replies: 16
Views: 470

Re: Which games from other platforms did you wish was on the BBC?

I always longed for a proper version of Gauntlet, but could never really see how it would look nice on a Beeb, even if it could run at a decent speed. Between jerky scrolling, hi res / no colours, or chunky res with colours, it always seemed like an impossible task. That said, I've since imagined h...
by paulb
Sun Oct 01, 2017 1:04 pm
Forum: hardware
Topic: Electron ULA Schematics
Replies: 18
Views: 700

Re: Electron ULA Schematics

Thanks to Harry for making these scans available! Page 4/Sheet 5 might be related to the keyboard decoding, just from a quick look. Page 5/Sheet 6 seems to have colour outputs, so it might be related to the palette. Page 6/Sheet 7 might be related to the display logic, given some of the labels. Page...
by paulb
Mon Sep 18, 2017 5:41 pm
Forum: software: classic games
Topic: Galaforce 30th Anniversary Full Source code for BBC Micro
Replies: 15
Views: 1536

Re: Galaforce 30th Anniversary Full Source code for BBC Micro

What is the licence of the work? Does GitHub care about hosting potentially non-redistributable software? (Probably not: it drives people to their platform.) I'm not trying to infringe anyones copyrights and there are plenty of other examples of buildable retro BBC Micro software on github. I'd als...
by paulb
Mon Sep 18, 2017 1:42 pm
Forum: software: classic games
Topic: Galaforce 30th Anniversary Full Source code for BBC Micro
Replies: 15
Views: 1536

Re: Galaforce 30th Anniversary Full Source code for BBC Micro

I've finally managed to push this up to github for anyone interested. https://github.com/crumbgit/Galaforce What is the licence of the work? Does GitHub care about hosting potentially non-redistributable software? (Probably not: it drives people to their platform.) Also, in the README.md file it sa...
by paulb
Sat Sep 16, 2017 9:26 pm
Forum: hardware
Topic: Troubleshooting my latest BBC B
Replies: 70
Views: 1224

Re: Troubleshooting my latest BBC B

Btw, if you just need a few general odds and ends, Kjell & Company can be useful, as well. Especially if you live in, or around, Oslo. Yes, it's great that Kjell & Company came to town, filling the gap that Clas Ohlson managed to leave open in the last few years. Their prices really aren't ...
by paulb
Sat Sep 16, 2017 6:29 pm
Forum: hardware
Topic: Troubleshooting my latest BBC B
Replies: 70
Views: 1224

Re: Troubleshooting my latest BBC B

You can get quite a number of items shipped from Elfa for NOK 60,- (GBP 5,60) shipping, and 0,- handling fee. Deliveries are quite fast too. So I'll go with them. Do they still provide some kind of local presence? The irritating thing about Mouser, Digikey, RS and those suppliers is that they prete...
by paulb
Sat Sep 16, 2017 5:57 pm
Forum: hardware
Topic: Troubleshooting my latest BBC B
Replies: 70
Views: 1224

Re: Troubleshooting my latest BBC B

UPS can be quite "slow". DHL is quite fast, but they also charge a lot to handle VAT/customs declaration. (Close to GBP 25 in handling fees for the last item they shipped here) Last time Posten did the customs for something I ordered, that may have been going on for GBP 15, if I remember ...
by paulb
Sat Sep 16, 2017 4:09 pm
Forum: hardware
Topic: Troubleshooting my latest BBC B
Replies: 70
Views: 1224

Re: Troubleshooting my latest BBC B

I'm located in Norway, so trade counters are hard to come by. RS has a Norwegian site that I'll check out (I recently registered), but I suspect they don't give free shipping to here. No matter what, I'll order a few spares this weekend :D Mouser does free shipping to Norway, and Digikey also appar...
by paulb
Fri Sep 15, 2017 4:47 pm
Forum: other vintage computer hardware, software and games
Topic: Eastern Blok computers
Replies: 7
Views: 476

Eastern Block computers

Interesting to note, while many such machines were based on local implementations of z80, at least one is based on LSI-11 architecture - a PDP-11 on your desk! https://en.wikipedia.org/wiki/Electronika_BK Indeed, we had a discussion about PDP-11 and similar architectures a while back. Of course, no...
by paulb
Mon Sep 11, 2017 4:12 pm
Forum: general
Topic: Artwork on the Music 500 manual
Replies: 5
Views: 239

Re: Artwork on the Music 500 manual

I meant to add a pic here ... The compositional elements are reminiscent of some of the Electron promotional materials. AMP18 Masterpieces of Software from Acornsoft for the Electron has a different style and is a bit more surreal, however. I imagine that there are other works by the same artist am...
by paulb
Sun Sep 10, 2017 8:40 pm
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 23
Views: 537

Re: Using BBC BASIC to teach programming concepts in 2017

You can probably guarrantee that whenever there's some news item with somebody saying "Schools should teach X", my immediate response is: "what, you mean they don't? as in don't any more? they did when I was at school". With this observation we travel full circle to the topic of...
by paulb
Sun Sep 10, 2017 3:18 pm
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 23
Views: 537

Re: Using BBC BASIC to teach programming concepts in 2017

During my 'O' level years we had "Design For Living" which taught us exactly that. How to use a bank account, what mortgages were, how to avoid getting a "social disease", basic household skills such as not pouring grease down the drain and how to prepare food without poisoning ...
by paulb
Mon Sep 04, 2017 2:46 pm
Forum: off-topic
Topic: Fine Ales
Replies: 18
Views: 495

Re: Fine Ales

Now, you know those are IINOs (IPAs In Name Only) - the American stuff is a revival of the original 1800s stuff from here - quite strong and heavily hopped to survive the journey to India. The modern IPA is quite a nice thing and should demonstrate that strength should be a secondary consideration ...
by paulb
Wed Aug 16, 2017 10:28 pm
Forum: hardware
Topic: Isolated Word Recognisor
Replies: 8
Views: 347

Re: Isolated Word Recognisor

Maybe it really is what the name says: voice recognition was becoming an area of interest for companies like Acorn in the 1980s.
by paulb
Wed Aug 16, 2017 9:59 am
Forum: software: classic games
Topic: "Unfixable bug" in BBC B Elite
Replies: 41
Views: 2003

Re: "Unfixable bug" in BBC B Elite

I wonder who "nix" is, and where this came from? He (gender assumed) is a regular at LWN.net, but unlike others his identity hasn't been revealed by various means. (Although I think that the message should be more important than the identity, the custom for using opaque identities on that...
by paulb
Tue Aug 15, 2017 7:35 pm
Forum: software: classic games
Topic: "Unfixable bug" in BBC B Elite
Replies: 41
Views: 2003

Re: "Unfixable bug" in BBC B Elite

I was reading lwn.net the other day and came across this in the comments: I can think of two pieces of software that were completed. TeX, because Knuth decreed it (and bugfixes didn't stop even then), and BBC B Elite, which must be considered to eventually have been completed because there was lite...
by paulb
Sun Jul 30, 2017 7:53 pm
Forum: software: other
Topic: cc65 C Cross Compiler
Replies: 17
Views: 932

Re: cc65 C Cross Compiler

I ran strings on the bbc.lib and confirmed that it seems to contain 'BRKV', 'EVNTV' in. My only thought is that my link line isn't actually using bbc.lib, but then even explicitly adding the lib to the link line returns the exact same error messages about missing 'BRKV' etc. cl65 -t bbc -m hello.ma...
by paulb
Sat Jul 29, 2017 10:45 am
Forum: emulators
Topic: AMP: Combining bare-metal emulation with Linux on the same Pi
Replies: 3
Views: 255

Re: AMP: Combining bare-metal emulation with Linux on the same Pi

I'm not familiar with the details of the Raspberry Pi series, but this sounds like the kind of thing people do with hypervisor/microkernel solutions. I've been playing around with Fiasco.OC recently, and it seems that people do rather similar things to this with that technology. In other words, peop...
by paulb
Fri Jul 28, 2017 7:45 pm
Forum: hardware
Topic: 6809 experiments
Replies: 122
Views: 5005

Re: 6809 experiments

lezanderson wrote:If you are wanting a 'New' Acorn Electron ..the first thing to do is put the Electron ULA onto a CPLD.


See here for exactly this.
by paulb
Fri Jul 28, 2017 1:37 pm
Forum: hardware
Topic: 4corn update 28/07/2017 - Circuit Diagrams
Replies: 8
Views: 348

Re: 4corn update 28/07/2017 - Circuit Diagrams

flibble wrote:Firefox? They're just jpeg, if very large.


Firefox may refuse to show them at full resolution, showing an upscaled lower-resolution version instead, at least if my experience is representative. Any half-decent image viewer should be adequate, though.

Thank you very much for doing this!
by paulb
Thu Jul 27, 2017 2:24 pm
Forum: hardware
Topic: Possibly Unscanned Acorn Circuit Diagrams - Need Help!
Replies: 15
Views: 810

Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

An update, this week I have access to an A3 scanner, but it doesn't quite have my ideal specs, only scans to compressed jpeg. Here is a scan of the Electron Plus 1 diagram at 600dpi greyscale JPEG, at this res it is very readable and the slight badness in the scan is mainly down to the photocopiedn...
by paulb
Wed Jul 12, 2017 7:32 pm
Forum: software: other
Topic: He-Man music demo
Replies: 12
Views: 686

Re: He-Man music demo

Very nice! Will Thundercats be next?
by paulb
Tue Jul 11, 2017 3:22 pm
Forum: software
Topic: Editing the palette in !Paint
Replies: 2
Views: 189

Re: Editing the palette in !Paint

Am I missing the obvious, but if I create a 256 colour sprite in !Paint, with a palette, how does one then edit this palette? I can find the 'Edit Palette' menu option, but is greyed out. Is this because it is this 'Partial Palette'? If so, how do I create a 'Full Palette' 256 colour sprite? I didn...
by paulb
Mon Jul 10, 2017 11:15 am
Forum: archive submissions
Topic: 32016 REDUCE
Replies: 6
Views: 339

Re: 32016 REDUCE

Boydie wrote:According to the manual, REDUCE comes with an associated support language, RLISP.
It also comes with a Standard LISP compiler which is loaded on demand (switch COMP should be turned on).


More details on RLISP here.

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