Search found 843 matches

by kieranhj
Sat Jan 18, 2020 5:22 pm
Forum: wanted
Topic: Wanted: A3000
Replies: 2
Views: 104

Re: Wanted: A3000

I have an A3020 already so looking for an A3000 at this time.
by kieranhj
Sat Jan 18, 2020 4:51 pm
Forum: wanted
Topic: Wanted: A3000
Replies: 2
Views: 104

Wanted: A3000

Hello all, I’m interested in acquiring an A3000 for software development purposes. I am happy to pay a fair, but not excessive, price depending on configuration of RAM/HDD etc. Only requirement is that the machine is in full working order and the motherboard is demonstrably free of battery damage (c...
by kieranhj
Sun Jan 12, 2020 4:57 pm
Forum: software: classic games
Topic: Electron Elite disk image.
Replies: 14
Views: 580

Re: Electron Elite disk image.

Elite typically did have anti-tampering CRC protection in a number of places.

I made a buildable disassembly of the BBC cassette version of Elite (probably the closest to the Electron version) which you can find on GitHub here: https://github.com/kieranhj/elite-beebasm
by kieranhj
Mon Jan 06, 2020 9:23 pm
Forum: general
Topic: Today I received.....
Replies: 5613
Views: 468017

Re: Today I received.....

Maybe 2020 is the year of ‘next gen’...? :wink:
by kieranhj
Sat Jan 04, 2020 7:36 pm
Forum: general
Topic: Post pictures of your beeb setup
Replies: 229
Views: 30376

Re: Post pictures of your beeb setup

I found some time over the holidays to get my office set back up. I have managed to squeeze in 9 machines (not including the laptop) that can be used with only a modicum of cable shuffling. I’m on a bit of a ‘next gen’ trip for 2020 hence the Atari ST, Amiga and Archie. Of course it’ll all get destr...
by kieranhj
Fri Dec 27, 2019 10:39 pm
Forum: general
Topic: 363C Lecture: The Ultimate Acorn Archimedes talk
Replies: 3
Views: 321

Re: 363C Lecture: The Ultimate Acorn Archimedes talk

I saw this mentioned on Twitter but didn’t have a link to the media for the talk itself, so thank you for posting that! Looking forward to watching it soon. 8)
by kieranhj
Fri Dec 27, 2019 5:35 pm
Forum: projects
Topic: Bouncing Basketball tech demo on the Acorn Electron
Replies: 40
Views: 1158

Re: Bouncing Basketball tech demo on the Acorn Electron

=D> You’re just showing off now. :wink:

Any chance of an ssd now I’ve got my Elk set up with an SD64 plz?

Looking forward to what you come up with next and maybe a full length demo for NOVA2020...?
by kieranhj
Fri Dec 27, 2019 5:19 pm
Forum: software
Topic: New demo - Horizon
Replies: 11
Views: 1636

Re: New demo - Horizon

Thanks for doing a write up Sarah, this is really interesting. It’s been so long since I did any ARM, I naively assumed there would be no need for lots of unrolled code but clearly I’m completely wrong! I think I managed a 4x4 pixel rotozoomer but that was my limit BITD. There are a ton of awesome e...
by kieranhj
Sat Dec 14, 2019 11:40 pm
Forum: software: other
Topic: Merry Christmas from Bitshifters!
Replies: 10
Views: 606

Re: Merry Christmas from Bitshifters!

IIRC many of the effects are done by changing the palette at the right moment. Can this be done on a FPGAtom, now that we have 64 colours and an eight MHz cpu core? This one has no fancy palette switching or CRTC tricks - at 2MHz there’s just enough time to move 64 3x3 pixel blocks independently. S...
by kieranhj
Sat Dec 14, 2019 10:34 pm
Forum: software: other
Topic: Merry Christmas from Bitshifters!
Replies: 10
Views: 606

Re: Merry Christmas from Bitshifters!

:shock: :shock: Absolutely nuts! Such smooth animation. Brilliant! =D> =D> Btw, unlike the older version on the Bitshifters website, the latest version of JSBeeb enables sound on iOS: https://bbc.godbolt.org/?disc=https://bitshifters.github.io/content/bs-xmas-19.ssd&autoboot&model=Master :idea: Tha...
by kieranhj
Sat Dec 14, 2019 10:04 pm
Forum: software: other
Topic: Merry Christmas from Bitshifters!
Replies: 10
Views: 606

Merry Christmas from Bitshifters!

bs-xmas-19.png
A festive greeting from Bitshifters for your BBC Micro!
https://bitshifters.github.io/posts/pro ... as-19.html
by kieranhj
Sat Dec 14, 2019 12:21 am
Forum: projects
Topic: The well known Bad Apple demo on the Acorn Electron
Replies: 19
Views: 882

Re: The well known Bad Apple demo on the Acorn Electron

Amazing work! Love the high-res scanline look. =D>
by kieranhj
Sun Dec 08, 2019 1:27 pm
Forum: software
Topic: New demo - Horizon
Replies: 11
Views: 1636

Re: New demo - Horizon

A great excuse for me to set my office back up after all the unplugging for ABUG! I’ll see if I can make a decent video capture from real hardware at some point too.
by kieranhj
Sun Dec 08, 2019 12:14 am
Forum: software: other
Topic: BooBip RTool 1.04 released
Replies: 13
Views: 464

Re: BooBip RTool 1.3b released

All but the earliest versions should work with higher PAGE - which one were you using Kieran? I regularly use ADFS and DFS with RT1.02 and that was fine :? Whichever one I got with my EEPROM. :) My B is still in a box after last ABUG but I’ll check when I set it all back up (hopefully tomorrow) and...
by kieranhj
Sun Dec 08, 2019 12:07 am
Forum: software: other
Topic: BooBip RTool 1.04 released
Replies: 13
Views: 464

Re: BooBip RTool 1.3b released

Thanks for the update! Any chance of a version that can cope with PAGE a bit > &1900 please? Several times I accidentally loaded two FS ROMs into my EEPROM so PAGE ended up ~&1B00. After that I get a ‘No Room’ error when trying to update ROM slots, which makes it a bit painful to correct my mistake.
by kieranhj
Sat Nov 30, 2019 1:08 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 24 to 26 January 2020: NOW FULL
Replies: 171
Views: 6269

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

So soon! Oh go on then, yes, please put me down for a table from Friday through Sunday. Thanks again for organising. :)
by kieranhj
Sun Nov 24, 2019 11:44 am
Forum: software: other
Topic: New music conversion - Castlevania III
Replies: 17
Views: 1079

Re: New music conversion - Castlevania III

Great work Sarah! It was lovely to hear this on real hw at ABUG. :) Sounds amazing, like a real arcade machine and nothing like a Beeb! =D>
by kieranhj
Fri Nov 22, 2019 6:38 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 22 to 24 November 2019 - NOW FULL
Replies: 179
Views: 8070

Re: ABUG SOUTH 22 to 24 November 2019 - NOW FULL

Not very Acorn, I know, but does anyone have an Amiga 1200 they could bring along this weekend please? I have a new 8mb RAM upgrade for mine but it resolutely refuses to work. It would be great to determine whether the problems lies with the RAM board or my motherboard before I (continue) complainin...
by kieranhj
Mon Nov 18, 2019 7:04 pm
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 26
Views: 1019

Re: OSWORD &7F on DFS vs MMFS

Actually, it seems it didn't, at least not on the Model B. Oops, oh dear, that's definitely my bad, as they say. :oops: I'm slightly disappointed that no-one complained about it for the last two years. #-o Looks like 2 sectors reads is the way to go, at least for 'fast' devices (will need to test o...
by kieranhj
Mon Nov 18, 2019 8:09 am
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 26
Views: 1019

Re: OSWORD &7F on DFS vs MMFS

I had a quick look at Teletext Bad Apple this afternoon (as I wanted to test the ICE-6502 in anger). On a Model B with the latest MMFS (1.44) it crashes consistently at 00:54 due to the ring buffer underflowing. Looking at why this might be, I noticed for "fast" devices the player is dynamically pa...
by kieranhj
Sun Nov 17, 2019 2:12 pm
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 26
Views: 1019

Re: OSWORD &7F on DFS vs MMFS

I still need to close the loop with Kieron on the Bad Apple / MMFS issues, so this may end up changing back again. Happy to do this at ABUG next weekend, a good opportunity to get to the bottom of it with the right people in the room! I also have a sneak peak of a new streaming demo so quite timely...
by kieranhj
Wed Nov 13, 2019 10:54 pm
Forum: programming
Topic: Mode 7 flip between pages
Replies: 12
Views: 992

Re: Mode 7 flip between pages

I’m sure there are some practical posts on here or maybe the old RetroSoftware programming forum. Otherwise check out the technical details on BeebWiki: http://beebwiki.mdfs.net/Address_translation#TTX_VDU
by kieranhj
Tue Nov 12, 2019 9:09 pm
Forum: programming
Topic: Mode 7 flip between pages
Replies: 12
Views: 992

Re: Mode 7 flip between pages

It’s been long established that with CRTC linear addressing mode, as used for MODE 7, the screen address is generally restricted to the top 1024 bytes of lower RAM, so &7C00 to &7FFF. However on Model B there is also a mapping to &3C00 which can be used for buffer swapping. Sadly this isn’t availabl...
by kieranhj
Mon Nov 11, 2019 8:45 pm
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 26
Views: 1019

Re: OSWORD &7F on DFS vs MMFS

Sounds like a bug/regession in MMFS/ Can you provide a few more details please, so I can try to replicate: - version of MMFS that doesn't work - version of MMFS that does work (if you can remember) - hardware configuration (Beeb, Master, etc) - brand of SD card - link to the version of the Bad Appl...
by kieranhj
Sun Nov 10, 2019 10:22 pm
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 26
Views: 1019

Re: OSWORD &7F on DFS vs MMFS

I can’t answer your questions #-o but I do have some to add of my own. The Teletext Bad Apple demo uses OSWORD &7F for multi-sector reads and used to work fine on MMFS (in fact I recall I had to make some changes to the way the streaming worked to accommodate) but I haven’t been able to get it runni...
by kieranhj
Mon Oct 28, 2019 10:10 pm
Forum: software: other
Topic: Game with Demo for Showing Off?
Replies: 9
Views: 545

Re: Game with Demo for Showing Off?

Prince of Persia has a cutscene and a short gameplay sequence on loop. The music gets a bit grating but you can turn the volume down with CTRL+cursor down!
by kieranhj
Wed Oct 23, 2019 7:45 pm
Forum: programming
Topic: BBC b, reading the CRT vertical sync position.
Replies: 13
Views: 1473

Re: BBC b, reading the CRT vertical sync position.

(Sorry, only a quick reply as I’m on a train.) Glad you found my write up useful. It’s not possible to read the vertical position of the raster from a CRTC register. *FX19 waits for the vertical sync interrupt which typically occurs a few rows after the end of the visible part of the screen has been...
by kieranhj
Sat Oct 19, 2019 7:50 pm
Forum: hardware
Topic: Electron Plus 3 PSU with vanilla Elk?
Replies: 4
Views: 187

Re: Electron Plus 3 PSU with vanilla Elk?

1024MAK wrote:
Sat Oct 19, 2019 7:28 pm
Yes.
Great! Thank you for confirming. I wish it didn’t hum so loudly, mind. :shock:
by kieranhj
Sat Oct 19, 2019 7:48 pm
Forum: hardware
Topic: Electron Plus 3 PSU with vanilla Elk?
Replies: 4
Views: 187

Re: Electron Plus 3 PSU with vanilla Elk?

Steve1234 wrote:
Sat Oct 19, 2019 7:18 pm
Ive been using a bog standard 19v laptop psu without any problems.
Sadly both of my laptops are USB-C ports only. #-o
by kieranhj
Sat Oct 19, 2019 7:03 pm
Forum: hardware
Topic: Electron Plus 3 PSU with vanilla Elk?
Replies: 4
Views: 187

Electron Plus 3 PSU with vanilla Elk?

Hey all, a quick question - is it safe to use the black 21V PSU for an Electron Plus 3 with a regular Electron without the Plus 3 attached? I don't have the original cream wall-wart power supply but want to remove my Plus 3 for a bit. Thought I'd check in case I'm going to fry the little thing. If n...