Search found 265 matches

by tom_seddon
Fri Apr 19, 2019 9:58 pm
Forum: projects
Topic: Acorn Electron demo effects
Replies: 11
Views: 238

Re: Acorn Electron demo effects

Who'd ever have thought the Electron had it in it!

Would the screen address granularity be good enough to create something like one of the effects here? - http://norecess.cpcscene.net/the-elders-scrollers.html

--Tom
by tom_seddon
Thu Apr 18, 2019 2:16 pm
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

BeebLink now supports cmorley's Tube serial adapter in comms mode, meaning installation and setup is much simplified, and max throughput is improved in most cases* - It's enough of an improvement over the AVR setup that it's now the preferred link type, even though strictly speaking this is beta fun...
by tom_seddon
Mon Mar 25, 2019 2:09 pm
Forum: software: new games
Topic: Stunt Car Racer for BBC Master
Replies: 48
Views: 2267

Re: Stunt Car Racer for BBC Master

A minor Stunt Car Racer update has been released: version 1.1. This fixes a couple of issues with the first release, and adds ADFS compatibility. You can download it from the site: https://bitshifters.github.io/posts/prods/bs-scr-beeb.html Stunt Car Racer now also comes as an ADFS image: https://bit...
by tom_seddon
Sun Mar 24, 2019 10:40 pm
Forum: software: other
Topic: Climbing Man illusion (BBC BASIC)
Replies: 11
Views: 376

Re: Climbing Man illusion (BBC BASIC)

I assume OSBYTE 25 came as part of the Master's OS? - it's documented in the Master Reference Manual, part 1 (page D.2-28). You can reset character definitions in blocks of 32 (i.e., 256 bytes'-worth), according to the value of X: 0 = 32-255 1 = 32-63 2 = 64-95 3 = 96-127 (etc.) 7 = 224-255 Accordin...
by tom_seddon
Tue Mar 19, 2019 12:31 am
Forum: emulators
Topic: Filing system tests and B-Em
Replies: 3
Views: 382

Re: Filing system tests and B-Em

I had to update my FS tester again, as I noticed an issue running Stunt Car Racer on BeebLink that it wasn't catching. (OSFILE A=0 should update the parameter block with length/attributes - and it now tests for this.) While I was doing stuff to it, I fixed it up to make it ADFS-friendly, changed its...
by tom_seddon
Fri Mar 15, 2019 5:56 pm
Forum: software: new games
Topic: Stunt Car Racer for BBC Master
Replies: 48
Views: 2267

Re: Stunt Car Racer for BBC Master

Thanks for the report - looks like I missed that bit out when updating the manual text that goes on the disc... :oops:

This oddity was inherited from the C64 version - sounds like the C64 suffers quite badly from ghost keys - and we tried to leave the gameplay code alone.

--Tom
by tom_seddon
Fri Mar 15, 2019 4:30 pm
Forum: development tools
Topic: Ghidra disassembler
Replies: 4
Views: 205

Re: Ghidra disassembler

I've been giving Ghidra a go, and I'm not finding it very good for 6502 stuff (yet?). The main problem I've got with it is that when it finds an instruction with a register+constant addressing mode, if it can figure out the value of the register, it treats the effective address as the byte of intere...
by tom_seddon
Tue Mar 12, 2019 12:26 am
Forum: community projects
Topic: Earliest examples of each machine?
Replies: 41
Views: 5734

Re: Earliest examples of each machine?

Issue 3 Beeb with serial number ICL 003253 for sale on eBay: https://www.ebay.co.uk/itm/Acorn-BBC-B- ... 4159619153

--Tom
by tom_seddon
Mon Mar 11, 2019 5:27 pm
Forum: software: other
Topic: Drawing a circle in BBC BASIC
Replies: 36
Views: 1371

Re: Drawing a circle in BBC BASIC

I've always found BBC BASIC more convenient as text too, since I'm almost always looking at it on the PC. To do this on OS X, I use BBCBasicToText , in conjunction with wget. Use wget to download the tokenized data and print it to stdout; pipe the result through BBCBasicToText, and out comes text. F...
by tom_seddon
Sat Mar 09, 2019 10:55 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29502

Re: RGB to HDMI using a Pi Zero and a small CPLD

Trixster posted about a problem with the Stunt Car Racer instructions screen when using RGB2HDMI: https://stardot.org.uk/forums/viewtopic.php?f=57&t=16655#p230419 The Stunt Car Racer instructions screen is 41 columns wide, with an hsync position of 53 (https://github.com/kieranhj/scr-beeb/blob/bf5b4...
by tom_seddon
Sat Mar 09, 2019 6:09 pm
Forum: software: new games
Topic: Stunt Car Racer for BBC Master
Replies: 48
Views: 2267

Re: Stunt Car Racer for BBC Master

Here’s a quick video of this great game: https://youtu.be/0S_L6OKQjIg I’m not sure why the rgbtohdmi has a problem syncing with the pre-titles menu? I have to disable mode7 in the rgbtphdmi’s menu to get the options to display Oh, interesting... thanks for the report! The Mode 7 display is slightly...
by tom_seddon
Mon Feb 25, 2019 6:43 pm
Forum: programming
Topic: Extended key numbering (OSbyte &8A)
Replies: 5
Views: 190

Re: Extended key numbering (OSbyte &8A)

129 is just f1. The value is set by OSBYTE $E1 - read/write function key status (soft keys or codes). By default the special keys map to $80...$8f. If you want Shift+f1, you'd need to insert $91. (I remember this being used a lot for stuff that needed to change PAGE, often after relocating some BASI...
by tom_seddon
Mon Feb 25, 2019 12:32 am
Forum: hardware
Topic: Strange error when running Snapper on my BBC Master - Solved
Replies: 7
Views: 292

Re: Strange error when running Snapper on my BBC Master

I can get this error on my Master if I do ?&FE66=0:?&FE67=0 then boot the disc... naughty Snapper should make sure it sets the timer reload value to something other than 0 before checking that repeated reads give different values! The OS doesn't do anything to the system VIA on startup... I don't th...
by tom_seddon
Fri Feb 22, 2019 11:17 pm
Forum: programming
Topic: Master 128 + second processor + second second processor
Replies: 16
Views: 638

Re: Master 128 + second processor + second second processor

Thanks for trying these additional combinations! Simply doing a screen's-worth of GCOL/PLOT in Mode 2 takes 73 seconds, suggesting that the Master is the bottleneck here. (4MHz = ~4,000 seconds, 16MHz = ~1,000 seconds - so you'd expect ~350MHz to be more like 45 seconds.) So this is the numerous ext...
by tom_seddon
Fri Feb 22, 2019 8:07 pm
Forum: hardware
Topic: HostFS+TCPIP
Replies: 13
Views: 362

Re: HostFS+TCPIP

Excellent... the more PC<->BBC filing systems, the better, in my view! It's such a good way to do things. Can't remember if I saw this particular device when looking for wifi/eithernet BBC<->PC options, but if I did, I definitely didn't notice it was 5V tolerant! What does this look like from the BB...
by tom_seddon
Thu Feb 21, 2019 7:47 pm
Forum: hardware
Topic: Thinking of trying out Pi coprocessor on my model B
Replies: 17
Views: 630

Re: Thinking of trying out Pi coprocessor on my model B

If you've got a ROM you use a lot that's got some space at the end, another option is to combine it and the Tube host code into a new ROM that provides the functionality of both. Get JGH's standalone Tube host module from here: http://mdfs.net/Software/BBC/Modules/ (I think this is usable as-is as a...
by tom_seddon
Wed Feb 13, 2019 6:00 pm
Forum: programming
Topic: Master 128 + second processor + second second processor
Replies: 16
Views: 638

Re: Master 128 + second processor + second second processor

Some stuff about how to get this working below... --Tom Links The Tube App Note is worth reading. Most of the info here is in there too... JGH has disassemblies of the standard Tube host code , and BeebWiki has pages on the Tube protocol . JGH's parasite OS - not exactly what's in the ROM (I don't t...
by tom_seddon
Wed Feb 13, 2019 6:00 pm
Forum: programming
Topic: Master 128 + second processor + second second processor
Replies: 16
Views: 638

Re: Master 128 + second processor + second second processor

It is a bit surprising, isn't it... I wonder if Acorn ever considered this sort of setup at the time, or thought of doing anything with it? I think there'd have been scope for adding some kind of explicit headless mode to the OS, with reduced I/O support and limited access to host machine resources,...
by tom_seddon
Wed Feb 13, 2019 4:43 pm
Forum: programming
Topic: Master 128 + second processor + second second processor
Replies: 16
Views: 638

Master 128 + second processor + second second processor

If you've got two second processors attached to your Master, the OS only uses one at a time. The OS is just ignoring the other one, but if it's powered on, it is running... You can write some code that does the same stuff as the standard Tube host code, but deals with both second processors instead ...
by tom_seddon
Tue Feb 12, 2019 11:29 pm
Forum: software: classic games
Topic: Best 2 player games?
Replies: 28
Views: 1059

Re: Best 2 player games?

Here's a few I remember playing when with friends I was young. I'll add votes for Way of the Exploding Fist and Bandits at 3 o'clock too :) Co-op games: Cyborg Warriors , Icarus , Dunjunz Competitive games: Grand Prix Construction Set , Stock Car Turn-based: Flip! , Holed Out I have memories of play...
by tom_seddon
Thu Feb 07, 2019 2:50 pm
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

Still none the wiser about this serial output issue, but it's just done 12 hours of error-free transfers (via the *SPEEDTEST command) with serial output disabled (as is the default). So whatever the problem turns out to be, you shouldn't see it with the default settings, at least.

--Tom
by tom_seddon
Wed Feb 06, 2019 1:57 am
Forum: for sale / freebies
Topic: Declutter Sale (BBC B, A3010, Monitors, Printer)***ALL SOLD***
Replies: 9
Views: 900

Re: Declutter Sale (BBC B, A3010, Monitors, Printer)

I'd like the 28-ADF32, please, if still available, to collect from Sheffield.

Thanks,

--Tom
by tom_seddon
Wed Feb 06, 2019 1:36 am
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

Does that even count as a cable? The multicoloured bit did come as one unit, but each end has its own individual connector, and they tear apart very easily, so I'm inclined to class it as a bunch of stuck-together bits of jumper wire myself :) I'm sort of amazed it works at all, really. On another n...
by tom_seddon
Tue Feb 05, 2019 3:56 pm
Forum: software: other
Topic: BBC *Status Command (and odd characters)
Replies: 24
Views: 627

Re: BBC *Status Command (and odd characters)

I'm guessing this could be the ROM in question, though it doesn't work on my Master, as of course the MOS gets the *STATUS :(

--Tom
by tom_seddon
Tue Feb 05, 2019 12:01 am
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

Any chance of a photo of your setup? Certainly, but don't expect much :) - I just plugged the dupont cable straight onto the header pins. It looks a bit rough and ready. IMG_20190204_222909367.jpg The two loose yellow pins are for resetting the device, which puts it into programming mode for a few ...
by tom_seddon
Mon Feb 04, 2019 2:57 am
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

On a beta basis, subject to ongoing testing ;) - BeebLink is now compatible with the SparkFun Pro Micro/Arduino Leonardo. The two designs are supposedly compatible, and the Pro Micro is open source, and available from various sellers, so there should now be fewer difficulties obtaining a BeebLink-co...
by tom_seddon
Sat Feb 02, 2019 8:39 pm
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

If you try it with a non-Minimus board yourself then I'd love to hear how you get on! I have a Teensy 3.5 which is ARM based. Do you think it's worth having a go with that? (I really have no idea how AVR specific BeebLink and it's dependencies are) The firmware is effectively AVR-only as it stands,...
by tom_seddon
Sat Feb 02, 2019 3:30 pm
Forum: projects
Topic: BeebLink
Replies: 28
Views: 1494

Re: BeebLink

I'd like to give BeebLink a try, but it seems the Minimus AVR USB 32K board is not easy to obtain now. Can anyone suggest a suitable replacement? I haven't actually yet tried it with another board, but it's intended to be relatively straightforward to make it work with anything supported by LUFA. I...
by tom_seddon
Thu Jan 31, 2019 10:21 pm
Forum: emulators
Topic: VIA test case: T2 freeze vs. IRQ
Replies: 2
Views: 183

Re: VIA test case: T2 freeze vs. IRQ

32, 255 on my Master 128.

--Tom
by tom_seddon
Thu Jan 24, 2019 3:40 pm
Forum: hardware
Topic: Caps lock LED slightly dimmer than the other two...
Replies: 1
Views: 163

Caps lock LED slightly dimmer than the other two...

Do LEDs grow dimmer over time with use? Just resoldered the cassette motor and shift lock LEDs on my B's keyboard, neither of which have worked for years, and they're both noticeably brighter than the caps lock one...

--Tom