Search found 1349 matches

by BigEd
Fri Sep 22, 2017 12:59 pm
Forum: software: other
Topic: Are there versions of BBC Basic with extensions (like procedures)
Replies: 10
Views: 300

Re: Are there versions of BBC Basic with extensions (like procedures)

(BBC Basic, in the SDL flavour, supports lots of platforms and for free - see here.)
by BigEd
Fri Sep 15, 2017 3:57 pm
Forum: other vintage computer hardware, software and games
Topic: Graphics on the Multicomp
Replies: 4
Views: 130

Re: Graphics on the Multicomp

There's a fair chance the Basic is taking no extra resources at all: you need memory in the FPGA, and that memory can be initialised at configuration time. So, in the first few milliseconds after power up, as the FPGA is configured to implement the right logic gates and connect them up in the right ...
by BigEd
Fri Sep 15, 2017 3:25 am
Forum: other vintage computer hardware, software and games
Topic: Eastern Blok computers
Replies: 7
Views: 378

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
by BigEd
Tue Sep 12, 2017 7:21 pm
Forum: upcoming and recent events & exhibitions
Topic: Retro Computer Festival - CCH, Cambridge - 16 & 17 September 2017
Replies: 28
Views: 1019

Re: Retro Computer Festival - CCH, Cambridge - 16 & 17 September 2017

I hope to go, not sure which day yet, probably as a joint expedition with revaldinho.
by BigEd
Sun Sep 10, 2017 5:00 pm
Forum: hardware
Topic: 6809 experiments
Replies: 109
Views: 4300

Re: 6809 experiments

Oh, yes please, do publish!
by BigEd
Sun Sep 10, 2017 10:49 am
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 23
Views: 417

Re: Using BBC BASIC to teach programming concepts in 2017

I notice you recommend using an emulator: how about RTR's free-as-in-beer SDL version of BBC Basic?
by BigEd
Sat Sep 09, 2017 7:43 pm
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 23
Views: 417

Re: Using BBC BASIC to teach programming concepts in 2017

Some interesting reading in that magazine - thanks for the pointer!
by BigEd
Fri Sep 08, 2017 1:03 pm
Forum: hardware
Topic: New 65C02/W65C816 copro
Replies: 65
Views: 2215

Re: New 65C02/W65C816 copro

An interesting (and frustrating?) gotcha!
by BigEd
Fri Sep 01, 2017 3:42 pm
Forum: software: classic games
Topic: "Unfixable bug" in BBC B Elite
Replies: 32
Views: 1275

Re: "Unfixable bug" in BBC B Elite

I was thinking about this a few weeks ago, and I thought one way to make it faster without losing much circularity would be to run the iteration twice - or more - between plottings. I
haven't yet tried it though.
by BigEd
Thu Aug 31, 2017 11:17 am
Forum: software: other
Topic: Another C compiler?
Replies: 6
Views: 328

Re: Another C compiler?

You might be interested in a collection of links to C compiler efforts, at least a couple of which are intended to be educational:
http://anycpu.org/forum/viewtopic.php?f=8&t=447
by BigEd
Thu Aug 31, 2017 11:04 am
Forum: software: other
Topic: Another C compiler?
Replies: 6
Views: 328

Re: Another C compiler?

Same talk(?) in Cardiff a bit earlier:
http://www.pydiff.wales/events/2017-09-19.html
by BigEd
Thu Aug 31, 2017 6:51 am
Forum: software: other
Topic: Another C compiler?
Replies: 6
Views: 328

Re: Another C compiler?

Great find! I think this is the repo for the project:
https://github.com/benjaminmisell/bbc-c

(I also found this unrelated but interesting story of building a C compiler over 40 days)
by BigEd
Wed Aug 30, 2017 8:49 am
Forum: software: other
Topic: Can we have useful BASIC with no IF statements?
Replies: 35
Views: 1051

Re: Can we have useful BASIC with no IF statements?

I'll raise you, can you write a paragraph (180 letters minimum) of English text which is readable out loud and which is meaningful and which makes sense without using the letter 'e'? Alrighty! Just switch on a BBC Micro and start coding. Try omitting all IFs, ANDs and BUTs... Oops! No BUTs in BBC B...
by BigEd
Tue Aug 29, 2017 3:52 pm
Forum: software: other
Topic: Can we have useful BASIC with no IF statements?
Replies: 35
Views: 1051

Re: Can we have useful BASIC with no IF statements?

Lardo Boffin wrote:You could try something like the following...

Yes, you can do a surprising amount with just arithmetic.
by BigEd
Tue Aug 29, 2017 3:51 pm
Forum: software: other
Topic: Can we have useful BASIC with no IF statements?
Replies: 35
Views: 1051

Re: Can we have useful BASIC with no IF statements?

I'll raise you, can you write a paragraph (180 letters minimum) of English text which is readable out loud and which is meaningful and which makes sense without using the letter 'e'? Mark I should think so. How difficult a task... not so difficult if you watch what you do. I know of a book - A Void...
by BigEd
Tue Aug 29, 2017 10:01 am
Forum: acorn atom
Topic: Atoms ahoy on HACKADAY!
Replies: 9
Views: 245

Re: Atoms ahoy on HACKADAY!

Well done Dave - fame at last! No, hang on, I think you might already be famous.

(The BlackIce boards are £42 incl UK shipping.)
by BigEd
Mon Aug 28, 2017 3:43 pm
Forum: software: classic games
Topic: Exile
Replies: 19
Views: 1609

Re: Exile

It does sound good. So long as the game can be completed without using glitches, that's a good sign.
by BigEd
Mon Aug 28, 2017 12:32 pm
Forum: software: classic games
Topic: Exile
Replies: 19
Views: 1609

Re: Exile

You're quite sure then there are no remaining subtle changes in the cracked game? It's almost a pity, as there might have been more to learn...
by BigEd
Mon Aug 28, 2017 11:54 am
Forum: hardware
Topic: Homemade BBC-micro-ish progress
Replies: 2
Views: 211

Re: Homemade BBC-micro-ish progress

Very nice!
by BigEd
Sun Aug 27, 2017 8:23 am
Forum: software: classic games
Topic: Exile
Replies: 19
Views: 1609

Re: Exile

That's good to know. Back in the day, I never heard of Exile. I'm impressed by the scope but I think it might be beyond my dedication to tackle it. Thrust is more my level.
by BigEd
Sat Aug 26, 2017 9:22 pm
Forum: software: classic games
Topic: Exile
Replies: 19
Views: 1609

Re: Exile

Jimmy Maher's comprehensive video game history has just reached the golden age of British open world action adventures, and covers Exile here : Coming nine years after Warren Robinett created his Adventure on the Atari VCS, Exile, which embraced much the same design philosophy but blew it all up to ...
by BigEd
Tue Aug 22, 2017 6:43 am
Forum: general
Topic: Beeb Spotting
Replies: 9
Views: 1211

Re: Beeb Spotting

At the PEEK&POKE museum in Rijeka, Croatia - TOOLKIT PLUS:
https://youtu.be/LlzLyhr4yi8?t=4m34s

And SWEET DREAMS on a Master Compact at the Museum of Computer and Information Technology in Katowice, Poland:
https://youtu.be/mcdyxCnZu7A?t=1m5s
by BigEd
Mon Aug 21, 2017 8:41 am
Forum: software: classic games
Topic: "Unfixable bug" in BBC B Elite
Replies: 32
Views: 1275

Re: "Unfixable bug" in BBC B Elite

(great link to brainwagon. There's an online in-browser Minskytron here.)
by BigEd
Sun Aug 20, 2017 7:03 pm
Forum: projects
Topic: Cowgol achieves first light!
Replies: 20
Views: 725

Re: Cowgol achieves first light!

Well done!
by BigEd
Sun Aug 20, 2017 7:02 pm
Forum: general
Topic: Retro Hardware Web Site - Looking for design ideas
Replies: 5
Views: 330

Re: Retro Hardware Web Site - Looking for design ideas

The most important thing for a resource like this is navigability and ease of discovery. Agreed Don't let it grow organically otherwise it will quickly become unwieldy. You need to choose an organisational structure and police it. I'd be careful with this. You don't know when you're starting exactl...
by BigEd
Tue Aug 15, 2017 5:31 am
Forum: programming
Topic: Space-efficient arithmetic on the 6502
Replies: 19
Views: 560

Re: Space-efficient arithmetic on the 6502

That's a Bruce Clark document - it's possible that he's missed a trick, but very unlikely. The problem with signed comparison is this: the inputs vary from -128 to 127, so the implied subtraction when you compare them ranges from -255 to +255 - that's a 9-bit result. It takes extra steps to construc...
by BigEd
Sun Aug 13, 2017 11:33 am
Forum: hardware
Topic: New 65C02/W65C816 copro
Replies: 65
Views: 2215

Re: New 65C02/W65C816 copro

(If anyone is building a new copro with bank switching, it would be great if they could follow the same scheme as used now in the Matchbox and the Pi-based copro, so that software can be portable across different implementations.) See here and here : Banked RAM in the 6502 models There is 1MByte of ...
by BigEd
Fri Aug 11, 2017 1:35 pm
Forum: hardware
Topic: New 65C02/W65C816 copro
Replies: 65
Views: 2215

Re: New 65C02/W65C816 copro

Thanks for sharing your files!
[For the curious: flancter]
by BigEd
Fri Aug 11, 2017 10:28 am
Forum: hardware
Topic: New 65C02/W65C816 copro
Replies: 65
Views: 2215

Re: New 65C02/W65C816 copro

...not available anywhere else at the moment. That's a very strong point: there's no '816 on the Pi, or the Matchbox, no HDL model. So it's a real concrete justification for a PCB+chips copro. Edit: and again, if there's not a lot of cost difference, a super-large RAM might also be a unique advanta...

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