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by BigEd
Thu Jul 09, 2020 6:06 pm
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

That doesn't sound too bad for me: I'm pasting into the command prompt, and one might paste into an INPUT statement. It doesn't seem too likely that I'd try to paste at the exact time a POS or VPOS was running.
by BigEd
Thu Jul 09, 2020 4:31 pm
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

Of course I don't know the architecture of the application, but would there be a way for the cursor position query to get back 'not known' or 'try again later', so it somehow yields to the text input handler?
by BigEd
Thu Jul 09, 2020 12:13 pm
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)
Replies: 1219
Views: 143330

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

Could be dirty contacts? The Tube connector gets very little use, and time has passed. So unplug and replug a few dozen times, or clean them with technique and determination.
by BigEd
Thu Jul 09, 2020 12:08 pm
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

If that keyboard buffer is configurable, should be no harm on a modern machine to increase it to a megabyte.
by BigEd
Thu Jul 09, 2020 11:20 am
Forum: general
Topic: Beeb Spotting
Replies: 76
Views: 9853

Re: Beeb Spotting

There's a Beeb visible at the soon-to-reopen VCF museum in the US:
Image
by BigEd
Thu Jul 09, 2020 11:01 am
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

I think perhaps the Windows key on a PC keyboard would work like the Command key when connected to a Mac. Or, if you have a mouse, the context menu offers Paste. (Or, control-F2 moves focus to the menu strip, and with the cursor keys you can find Paste in the Edit menu.) (I'm not too bothered by thi...
by BigEd
Thu Jul 09, 2020 8:26 am
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

One thing I notice, on the Mac, is that pasting many lines of text doesn't work so well: it will accept a dozen lines of input (or so) but ignore the rest. How are you attempting to paste? I looked at the possibility of taking input from the clipboard, but there seemed to be no straightforward cros...
by BigEd
Thu Jul 09, 2020 8:14 am
Forum: 8-bit acorn software: other
Topic: ABC compiles Basic V to 6502? [ABC65]
Replies: 8
Views: 296

Re: ABC compiles Basic V to 6502? [ABC65]

There's an indication here that it was indeed released, as a product with a price. Although it's a press release not an advert, and might possibly be a misinterpretation of a "coming soon". In New Computer Express (8 July 89, only 58p!) : Press Dabs pilercom[???] An interesting example of reverse en...
by BigEd
Thu Jul 09, 2020 8:05 am
Forum: 8-bit acorn software: other
Topic: ABC compiles Basic V to 6502? [ABC65]
Replies: 8
Views: 296

Re: ABC compiles Basic V to 6502? [ABC65]

Oh, great! It was, then, a separate product. I found this pre-announcement in the Dabhand guide to the Archimedes Operating System : Dabs Press will be adding to their increasing range of quality books and software for a wide range of micros during the next year. For the Archimedes this includes ABC...
by BigEd
Wed Jul 08, 2020 10:47 pm
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

One thing I notice, on the Mac, is that pasting many lines of text doesn't work so well: it will accept a dozen lines of input (or so) but ignore the rest.
by BigEd
Wed Jul 08, 2020 12:02 pm
Forum: new projects in development: games
Topic: COSMOS CHRONICLES
Replies: 19
Views: 560

Re: COSMOS CHRONICLES

If the game is not too speed-critical, you can run it in BAS128, which gives you 64k of space. (See application note "Using BAS128 on the Master 128 and Master")

Another tactic is to write the game and then run a cruncher on it so it takes less space:
Reducing Basic Program Size
by BigEd
Tue Jul 07, 2020 10:38 pm
Forum: 8-bit acorn software: other
Topic: ABC compiles Basic V to 6502? [ABC65]
Replies: 8
Views: 296

ABC compiles Basic V to 6502? [ABC65]

Paul Fellows, about the 1:18 mark of his recent ABUG talk , says he had a version of the Archimedes Basic Compiler which could compile BASIC V to 6502 code. He says it could produce code for the main 32k user space on the BBC Micro, or for sideways RAM space, possibly spanning multiple banks. Is tha...
by BigEd
Tue Jul 07, 2020 9:00 pm
Forum: programming
Topic: Self Modifying Code
Replies: 12
Views: 362

Re: Self Modifying Code

Oh, go for it! The only arguments against (that I can think of) is that's it's harder to maintain and debug. But as you say, sometimes it's a big win for speed.
by BigEd
Tue Jul 07, 2020 8:51 am
Forum: 8-bit acorn software: other
Topic: Another pi calculation in Basic
Replies: 0
Views: 104

Another pi calculation in Basic

Over on the hpmuseum forums, Gerson W. Barbosa offers a pi calculation using "the astounding Wallis-Wasicki formula": 10 FOR N=1 TO 7 20 T=(N+1)MOD2 30 S=2*T-1 40 L=N-2+3*T 50 M=6*T-2 60 D=4*N*(1-T)+2*T 70 E=4*N-D+2 80 C=-S*(L-M+2)/E 90 W=1 100 FOR I=1 TO N 110 T=4*I*I 120 W=W*T/(T-1) 130 C=S*L/(D+C...
by BigEd
Mon Jul 06, 2020 8:39 pm
Forum: acorn atom and acorn system series
Topic: Atom Video to HDMI Adapter
Replies: 264
Views: 16317

Re: Atom Video to HDMI Adapter

Probably this particular page: Quick Start Guide
by BigEd
Mon Jul 06, 2020 7:59 pm
Forum: 8-bit acorn emulators
Topic: Choosing a copyright license for DFS image tool / BBC BASIC de-tokenizer
Replies: 14
Views: 275

Re: Choosing a copyright license for DFS image tool / BBC BASIC de-tokenizer

Worth noting that the author (or their estate) can offer alternative licenses if asked. One might ask, whether it might be a negative to find someone selling (or even offering) something based on your code, with a statement that many bugs had been fixed, but with no offer of fixes in source. (Indeed...
by BigEd
Mon Jul 06, 2020 2:55 pm
Forum: 8-bit acorn emulators
Topic: Choosing a copyright license for DFS image tool / BBC BASIC de-tokenizer
Replies: 14
Views: 275

Re: Choosing a copyright license for DFS image tool / BBC BASIC de-tokenizer

Hmm, I'd say otherwise: it's not about commercial exploitation, it's about proprietary derivatives. An MIT/BSD style license is for people who are quite happy for their code to be taken by others, fixed, extended and modified in private, and then made available as non-free software to others. It aim...
by BigEd
Mon Jul 06, 2020 12:21 pm
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

Ah, thanks - that does make sense!
by BigEd
Mon Jul 06, 2020 11:57 am
Forum: 8-bit acorn hardware
Topic: TOP 5 interest of the RASP PI CO PRO ?
Replies: 64
Views: 1372

Re: TOP 5 interest of the RASP PI CO PRO ?

There'll be a price difference. Most people use a zero, I'm sure. Well, pretty sure.
by BigEd
Mon Jul 06, 2020 11:27 am
Forum: 8-bit acorn hardware
Topic: VIDEONULA questions
Replies: 41
Views: 1155

Re: VIDEONULA questions

(lucky you bought a spare machine to practice your desoldering!!)
by BigEd
Mon Jul 06, 2020 11:25 am
Forum: acorn & bbc micro user group (abug) events
Topic: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm
Replies: 62
Views: 2153

Re: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm

Many thanks. Pity I ran out of steam and had to duck out before the disk presentation - looks really good!
by BigEd
Mon Jul 06, 2020 11:24 am
Forum: modern implementations of classic programming languages
Topic: New: Console Mode editions of BBC BASIC
Replies: 79
Views: 1130

Re: New: Console Mode editions of BBC BASIC

(It's not obvious to me how setting TIME to 0 could fail to work, and make it positive, even if it starts out with the MSB set. Is there a simple answer to that?)
by BigEd
Mon Jul 06, 2020 11:22 am
Forum: 8-bit acorn hardware
Topic: Vcc above 5V - how much is too much?
Replies: 8
Views: 393

Re: Vcc above 5V - how much is too much?

(This is a really interesting failure mode!)
by BigEd
Sun Jul 05, 2020 9:32 pm
Forum: programming
Topic: About BBC Basic 4
Replies: 85
Views: 1909

Re: About BBC Basic 4

(But there is a clue if you search the forum for "unlistable")
by BigEd
Sun Jul 05, 2020 3:34 pm
Forum: acorn atom and acorn system series
Topic: Connect a 80287 to a 6502 computer?
Replies: 12
Views: 379

Re: Connect a 80287 to a 6502 computer?

The 287 does seem to want to talk to a 16 bit bus, so at minimum that's a bit of glue. And it wants to see opcodes and operands fed to it as if from a 286, but that might be something that could be done slowly. I like the idea of replacing Basic's FP functions with hardware assist though. As you not...
by BigEd
Sat Jul 04, 2020 11:28 am
Forum: 8-bit acorn hardware
Topic: A request for rare 32016 based hardware
Replies: 55
Views: 4951

Re: A request for rare 32016 based hardware

Oh, that's a nice link! ("Using Dynamic RAMs with Series 32000 CPUs") Thanks.
ns32k-DRAM-timings.png
by BigEd
Fri Jul 03, 2020 10:03 pm
Forum: 8-bit acorn hardware
Topic: A request for rare 32016 based hardware
Replies: 55
Views: 4951

Re: A request for rare 32016 based hardware

Thanks - I suspect someone will be able to decode the meaning of the various jumper settings. It seems the NS32016 takes 3 ticks to access memory, so that's 300ns compared to 120ns for the DRAM, so it might be that there are no wait states needed even for a 10MHz part. Indeed the service manual sugg...
by BigEd
Fri Jul 03, 2020 9:00 pm
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)
Replies: 1219
Views: 143330

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

Good point - if it's that, may need some determined plugging and un-plugging to clean the contacts. If you have a way to clean them mechanically, that could help.
by BigEd
Fri Jul 03, 2020 7:58 pm
Forum: acorn & bbc micro user group (abug) events
Topic: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm
Replies: 62
Views: 2153

Re: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm

(I'm guessing a fair proportion of people use mostly the Active Topics view of the forum... and this topic may have fallen off that list for a bit, and has now fallen back on.)

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