Search found 350 matches

by tom_seddon
Sun Dec 15, 2019 12:49 am
Forum: projects
Topic: BeebLink
Replies: 56
Views: 4124

Re: BeebLink

UPURS support is now non-experimental, as it's had a good amount of testing over the past 3 months, with no problems noted.

I'm now using UPURS BeebLink on my BBC B, so it will be getting ongoing use.

--Tom
by tom_seddon
Sun Dec 15, 2019 12:35 am
Forum: projects
Topic: BeebLink
Replies: 56
Views: 4124

Re: BeebLink

It absolutely would be. Google's rules in a nutshell for open source contributions are (a) it has to be under a real open source license and (b) it has to be clear that Google owns the copyright to what I'm writing. Being a contributor on GH repos is totally fine. That said, I'll send you a PR for ...
by tom_seddon
Sun Dec 08, 2019 12:33 am
Forum: software: other
Topic: BooBip RTool 1.04 released
Replies: 13
Views: 302

Re: BooBip RTool 1.3b released

Just upgraded my B's ROMFS copy of RTOOL now. I tried it on my Master too - works fine! - and after Kieran's comments I also tried it on my B with PAGE=&2100 - and no obvious problems noted.

--Tom
by tom_seddon
Sat Dec 07, 2019 4:43 pm
Forum: software: other
Topic: BooBip RTool 1.04 released
Replies: 13
Views: 302

Re: BooBip RTool 1.3 released

Excellent - this looks like it fixes a problem I was having on my Master 128 with ver 1.01, that I only recently figured out - OSWRCH can enable IRQs, so if $f4 isn't updated when printing the ROM title, you can get bogus results. I will be updating later! (Yes, I know you don't really need RTOOL on...
by tom_seddon
Thu Dec 05, 2019 9:14 pm
Forum: hardware
Topic: Info please! Acorn's in-house large-memory 6502 co-pro
Replies: 94
Views: 4128

Re: Info please! Acorn's in-house large-memory 6502 co-pro

I think it's far less useful if it can't present a flat memory model. But I'm not sure how the timing could work to handle the bit 15-16 carry (which as you say would only need to check a single bit discrepancy). Interesting snippet about BAS128 from http://www.rougol.jellybaby.net/meetings/2012/Pa...
by tom_seddon
Sat Nov 30, 2019 8:49 pm
Forum: hardware
Topic: 6502 2nd Processor
Replies: 8
Views: 328

Re: 6502 2nd Processor

KenLowe wrote:
Sat Nov 30, 2019 3:43 pm
I also notice that my board is missing the 74S74 IC27 that is on the Issue 4 board. I feel robbed :lol: :lol: .
I think there's somebody else on here with another one like this one - I'm sure I remember a photo of the circuit board with the missing chip and fuse.

--Tom
by tom_seddon
Sat Nov 30, 2019 1:19 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 24 to 26 January 2020 (Hampshire) BOOKING THREAD
Replies: 66
Views: 1932

Re: ABUG SOUTH 24 to 26 January 2020 (Hampshire) BOOKING THREAD

Full table for all 3 days please. Thanks for organising this.

--Tom
by tom_seddon
Fri Nov 29, 2019 9:52 pm
Forum: hardware
Topic: Info please! Acorn's in-house large-memory 6502 co-pro
Replies: 94
Views: 4128

Re: Info please! Acorn's in-house large-memory 6502 co-pro

Could it be the mystery version of BASIC whose existence hoglet proposed?

--Tom
by tom_seddon
Mon Nov 25, 2019 11:37 pm
Forum: hardware
Topic: Info please! Acorn's in-house large-memory 6502 co-pro
Replies: 94
Views: 4128

Re: Info please! Acorn's in-house large-memory 6502 co-pro

hoglet wrote:
Mon Nov 25, 2019 6:52 pm
BigEd wrote:
Mon Nov 25, 2019 6:50 pm
I hadn't thought that it might not do a RAM check. Does the ordinary 64k 6502 copro do a RAM check?
I don't think so.
JGH has a disassembly of the Tube parasite OS: http://mdfs.net/Software/Tube/6502/Clnt65v1.src - looks like the 64K message is hard-coded.

--Tom
by tom_seddon
Mon Nov 25, 2019 9:38 am
Forum: hardware
Topic: Info please! Acorn's in-house large-memory 6502 co-pro
Replies: 94
Views: 4128

Re: Info please! Acorn's in-house large-memory 6502 co-pro

This thread was mentioned on an ebay listing for an "extended 6502 second processor": https://www.ebay.co.uk/itm/Acorn-Extend ... 3412375870

--Tom
by tom_seddon
Fri Nov 22, 2019 10:55 am
Forum: software: classic games
Topic: 1985 Contraption (Icon Audiogenic Software Ltd)
Replies: 7
Views: 371

Re: 1985 Contraption (Icon Audiogenic Software Ltd)

Stock Car, Kix, Banjax, Holed Out, Vindaloo, Karate Combat, Rig Attack - think these are all Mode 1 too.

--Tom
by tom_seddon
Thu Oct 31, 2019 1:03 pm
Forum: emulators
Topic: ACCCON TST
Replies: 5
Views: 649

Re: ACCCON TST

MOS 3.50 has code in these pages.

Good point about pages $fc and $fd - I'd always assumed it was all 3 pages that were paged out, but come to think of it I'm not sure I ever actually tested this...

--Tom
by tom_seddon
Mon Oct 28, 2019 8:16 pm
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 981

Re: Loading a ROM into SW Ram - basics

That BASICED 'rom image' isn't a rom image - it looks like its the source code or something, possibly from github or somewhere? I can't tell how you've arrived at the file but it's just wrong! Have you selected the wrong file to download perhaps? For example here's the first few bytes..... <!DOCTYP...
by tom_seddon
Sun Oct 27, 2019 12:36 am
Forum: software: other
Topic: Updated BASIC Editor
Replies: 48
Views: 5072

Re: Updated BASIC Editor

There's a new version of the BASIC editor out! Get ver 1.44 from GitHub: https://github.com/tom-seddon/basic_editor/tree/master/releases What's new: Reinstate old CTRL+up/down behaviour Fix screen drawing bug More reliably clear screen before returning to command mode Switch to Mode 135/Mode 7 when ...
by tom_seddon
Mon Oct 21, 2019 10:47 pm
Forum: software: other
Topic: ADFS Compaction
Replies: 1
Views: 203

Re: ADFS Compaction

Interesting question! There's one free spaces array for the whole disk, and it's only 82 entries long - which I think this is the key to doing it on the 8-bit systems with bounded memory consumption. Start out by compacting the used areas. No need to pay attention to where anything in particular is,...
by tom_seddon
Sat Oct 12, 2019 12:54 am
Forum: software & utilities for the pc, mac or unix
Topic: Wires? Pah.....
Replies: 901
Views: 132473

Re: Wires? Pah.....

I used hoglet's routines from UPURSFS in the end, and BeebLink now has UPURS cable support: https://stardot.org.uk/forums/viewtopic.php?f=53&t=15605 (Max throughput is ~8.5 KBytes/sec - nowhere near as fast as the Tube serial adapter, but I'm still happy with the performance overall. The lack of see...
by tom_seddon
Sat Oct 12, 2019 12:14 am
Forum: projects
Topic: BeebLink
Replies: 56
Views: 4124

Re: BeebLink

On an experimental basis, BeebLink now supports the UPURS cable. Thanks to MartinB, hoglet and sweh for the UPURSFS transfer routines, and thanks to kieranhj for the loan of a cable. Throughput is not as good as when using the Tube serial adapter, but everything else works the same! UPURS support is...
by tom_seddon
Thu Oct 10, 2019 5:46 pm
Forum: hardware
Topic: HostFS+TCPIP
Replies: 68
Views: 2096

Re: HostFS+TCPIP

Sign me up for a board too! I'd like to add support for this to BeebLink. Not sure what the Beeb-side UI will look like yet, but I'll be having a think.

--Tom
by tom_seddon
Thu Oct 03, 2019 6:34 pm
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 36
Views: 1566

Re: Request for testers for quick but fascinating test case

Master 128, VL68C45, CMD G65C22

Code: Select all

2 CYCLE STRETCH: 255
3 CYCLE STRETCH: 255
--Tom
by tom_seddon
Fri Sep 27, 2019 11:39 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 22 to 24 November 2019 - NOW FULL
Replies: 179
Views: 7056

Re: ABUG SOUTH 22 to 24 November 2019 (Hampshire) BOOKING THREAD

I'd like a table for Friday to Sunday please.

--Tom
by tom_seddon
Tue Sep 24, 2019 2:02 pm
Forum: software & utilities for the pc, mac or unix
Topic: Wires? Pah.....
Replies: 901
Views: 132473

Re: Wires? Pah.....

Can anybody comment on the licence for the UPURS read/write routines used in the UPURSFS ROM? (https://sweh.spuddy.org/Beeb/UPURSFS/) I'm hoping to use them in BeebLink, which is GPL v3 or (at your option) any later version. The readme has a note about the code maybe not being GPL v2 compliant, but ...
by tom_seddon
Mon Sep 23, 2019 1:43 pm
Forum: past events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 10744

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

Completely forgot about this until just now: I ended up paying for somebody's fish and chips at the pub on Friday, as I was the last one to leave and they were a payment short. Does anybody remember leaving without paying?

--Tom
by tom_seddon
Thu Sep 19, 2019 11:05 pm
Forum: for sale / freebies
Topic: Cambridge ABUG Giveaway
Replies: 45
Views: 2278

Re: Cambridge ABUG Giveaway

Giveaway items list as promised! Unless noted: condition generally at least OK; tapes, disks and ROMs are entirely untested; all software BBC only; disks are 5.25". Boxed software: Go (Acornsoft) (box, disc, manual) Masterfile II (Beebugsoft) (box, disc, manual) (disc *VERIFY'd OK on my Master) Avia...
by tom_seddon
Thu Sep 19, 2019 10:45 pm
Forum: for sale / freebies
Topic: Cambridge ABUG Giveaway
Replies: 45
Views: 2278

Re: Cambridge ABUG Giveaway

I believe I have the actual plug-on Adaptor . . . Somewhere! If I find it, it's yours. Oops! - got over-excited and forgot that was just the book :lol: I'll take the book anyway, as I've a soft spot for the Psion Organiser II. And if the adapter ever turns up, I'll very gladly take it off your hand...
by tom_seddon
Wed Sep 18, 2019 12:25 pm
Forum: for sale / freebies
Topic: Cambridge ABUG Giveaway
Replies: 45
Views: 2278

Re: Cambridge ABUG Giveaway

If pre orders are a thing, the psion organiser comms link is of interest to me :)

Will have a rummage through some boxes and see if i can find any items for me to give away myself...

--Tom
by tom_seddon
Wed Sep 18, 2019 10:41 am
Forum: other vintage computer hardware, software and games
Topic: 27C400/800/160/320 emulator/ROM switcher
Replies: 24
Views: 1357

Re: 27C400/800/160/320 emulator/ROM switcher

Ah, excellent - that actually sounds like a very convenient arrangement!

Will definitely get one of these. It'll be great to finally be able to get rid of View and Viewsheet.

--Tom
by tom_seddon
Tue Sep 17, 2019 11:05 pm
Forum: other vintage computer hardware, software and games
Topic: 27C400/800/160/320 emulator/ROM switcher
Replies: 24
Views: 1357

Re: 27C400/800/160/320 emulator/ROM switcher

I assume the flying lead means an ordinary switch or button would also be an option for switching configuration? I use CTRL+BREAK quite a lot when using the Beeb, and I'm not sure I want it doing an OS switch each time :)

--Tom
by tom_seddon
Tue Sep 17, 2019 8:53 pm
Forum: hardware
Topic: Master very poor video output
Replies: 6
Views: 495

Re: Master very poor video output

I can (finally) confirm that B (HD6845) + SCART + my supermarket TV = decent quality output.

Hopefully I'll get to try more combinations at some point, but I'm going to blame the VL6845 for now.

--Tom
by tom_seddon
Mon Sep 16, 2019 10:19 pm
Forum: for sale / freebies
Topic: Cambridge ABUG Giveaway
Replies: 45
Views: 2278

Re: Cambridge ABUG Giveaway

I'll take the plinth!

--Tom
by tom_seddon
Sun Sep 15, 2019 3:11 pm
Forum: hardware
Topic: CRTC timing with 2MHz clock
Replies: 16
Views: 824

Re: CRTC timing with 2MHz clock

I'd always thought it was just the high clock period (T...U here) that got stretched, as per Matt's jsbeeb article: https://xania.org/201405/jsbeeb-getting-the-timings-right-cpu - but this diagram appears to show the low clock period stretched too! Unfortunately I don't have the skills to figure out...