Search found 340 matches

by VectorEyes
Sun Jun 21, 2020 12:40 am
Forum: new projects and releases: demoscene
Topic: New demo: 'Evil Influences' for the BBC Master
Replies: 7
Views: 417

New demo: 'Evil Influences' for the BBC Master

Bitshifters and Desire are proud to release 'Evil Influences' for the BBC Master. https://bitshifters.github.io/posts/prods/bs-evil-influences.html This one has been in development for many months and contains graphical techniques not previously seen on the Beeb (as far as I am aware!) It was a join...
by VectorEyes
Mon Jun 15, 2020 1:33 am
Forum: new projects and releases: demoscene
Topic: DEMOSCENE TOP DEMO
Replies: 9
Views: 487

Re: DEMOSCENE TOP DEMO

You'll need a BBC Master to run most of the recent demos!

Also, in around a week's time there'll be another one to add to the list... assuming I don't collapse from lack of sleep before Saturday!
by VectorEyes
Fri May 29, 2020 3:12 pm
Forum: 8-bit acorn emulators
Topic: b2 - new emulator
Replies: 136
Views: 16336

Re: b2 - new emulator

Not sure. I can compile the latest master branch from source and run both Release and Debug versions locally, which would suggest it's some problem with packaging / code-signing / notarisation of some kind, or perhaps libraries that are available on my machine that aren't on yours. Will try to see i...
by VectorEyes
Fri May 29, 2020 10:50 am
Forum: 8-bit acorn emulators
Topic: b2 - new emulator
Replies: 136
Views: 16336

Re: b2 - new emulator

Hi @LordVaderUK ... quick question: Where are you running B2 from? Do you run it from the Downloads folder or do you copy it to Applications? If you're downloading it straight to the Downloads folder and running it directly from there, it might be worthwhile copying it to the Applications folder and...
by VectorEyes
Fri May 29, 2020 12:26 am
Forum: 8-bit acorn emulators
Topic: b2 - new emulator
Replies: 136
Views: 16336

Re: b2 - new emulator

How confident do you feel building from source? I have recently been building B2 from source on macOS Catalina and although it requires a bit of command-line effort, it's really not that bad. If you're interested in giving it a go you could take a look at the instructions (https://github.com/tom-sed...
by VectorEyes
Thu May 28, 2020 12:22 am
Forum: new projects and releases: demoscene
Topic: NOVA Online Invite - a new Bitshifters demo for the BBC Master
Replies: 10
Views: 630

Re: NOVA Online Invite - a new Bitshifters demo for the BBC Master

Awesome demo Kieran and everyone else who contributed! There is definitely some history behind the fire alarm thing. :D At Nova 2019 the alarm went off at the end of the Friday evening, owing to the amount of smoke from the smoke machines. Some poor soul had to get up at almost midnight and come dow...
by VectorEyes
Wed May 27, 2020 5:56 pm
Forum: programming
Topic: Incrementing a 2-byte number
Replies: 14
Views: 664

Re: Incrementing a 2-byte number

Now try doing this when the preceding and following code is writing to the CRTC registers, which are 1MHz, so you have to take account of whether each CPU cycle is on an even or odd 1MHz tick and adjust the timings for STA <register> accordingly because of cycle-stretching... :D
by VectorEyes
Wed May 27, 2020 12:18 pm
Forum: programming
Topic: Incrementing a 2-byte number
Replies: 14
Views: 664

Re: Incrementing a 2-byte number

This is a great example of the various trade-offs you have to make when optimising code for space vs. speed, but there are other considerations as well: side-effects (or lack thereof) and cycle timing predictability. INC &70 BNE skiphigh INC &71 .skiphigh Takes: Either 8 or 12 cycles. (No good if yo...
by VectorEyes
Mon May 25, 2020 2:32 am
Forum: 8-bit acorn hardware
Topic: Trouble with Sideways RAM on Master 128
Replies: 21
Views: 502

Re: Trouble with Sideways RAM on Master 128

Could this be related to Smart SPI and use of the User Port for file loading? A while ago I gave UPURSFS a try to see whether I could use it to host files on my development machine (an iMac) and load them directly from the iMac. But I could never get Wave Runner to load because it crashed out toward...
by VectorEyes
Sun May 24, 2020 7:13 pm
Forum: programming
Topic: Shadow RAM question
Replies: 11
Views: 474

Re: Shadow RAM question

Thanks all. I suppose as long as my code lives and is accessing data only in sideways RAM, it shouldn't be a problem. Should be fine. The only things to watch out for when you have code and data in SWR is that 1. you keep track of which SWR bank is paged in (low four bits of ROMSEL, &FE30), and 2. ...
by VectorEyes
Sun May 24, 2020 6:07 pm
Forum: programming
Topic: Shadow RAM question
Replies: 11
Views: 474

Re: Shadow RAM question

Thanks all. I suppose as long as my code lives and is accessing data only in sideways RAM, it shouldn't be a problem. Should be fine. The only things to watch out for when you have code and data in SWR is that 1. you keep track of which SWR bank is paged in (low four bits of ROMSEL, &FE30), and 2. ...
by VectorEyes
Thu May 14, 2020 9:20 am
Forum: for sale / freebies
Topic: Wide variety of Acorn / RO hardware, software, and other artefacts
Replies: 19
Views: 1696

Re: Wide variety of Acorn / RO hardware, software, and other artefacts

Just noticed the Phoebe RISC PC II case with an asking price of £25. I'm definitely interested in that! Will pop a note in the email thread when I reply, so we don't lose track :) Oh dear, we've now had I think seven people say the same thing. I forget what the hold-up is on person 1 -- possible it...
by VectorEyes
Mon May 11, 2020 10:55 am
Forum: 32-bit acorn software: other
Topic: Shredding free space of hard drives
Replies: 13
Views: 638

Re: Shredding free space of hard drives

The obvious cheap-and-cheerful way to do it, to me, would be to have a few large-ish files filled with random data. Delete all the personal data, then fill up the free space with the random files. Then delete them and fill it up with some other random files. Repeat two or three times and it would be...
by VectorEyes
Mon May 11, 2020 1:14 am
Forum: 8-bit acorn software: other
Topic: Displaying photos in VideoNuLA attribute mode 1 (240x256, 16 colours)
Replies: 38
Views: 1836

Re: Displaying photos in VideoNuLA attribute mode 1 (240x256, 16 colours)

One question now though - does the stable raster technique work on b-em? If I do ever play around with this I'd be using an emulator and b-em is my emulator of choice most of the time. Unfortunately I think you'll need B2 or JSBeeb for accurate stable raster emulation. I recall moving from B-Em to ...
by VectorEyes
Mon May 11, 2020 12:45 am
Forum: 8-bit acorn software: other
Topic: Displaying photos in VideoNuLA attribute mode 1 (240x256, 16 colours)
Replies: 38
Views: 1836

Re: Displaying photos in VideoNuLA attribute mode 1 (240x256, 16 colours)

Yes, a Z3 theorem solver. Whatever that is. :) Regarding stable raster to squeeze in an additional palette change... you've got 48 cycles in the vertical blank. If you assume that every palette write is LDA immediate, STA palette register, you can fit in maximum 8 writes... But if you had A, X and Y...
by VectorEyes
Thu Apr 30, 2020 5:27 pm
Forum: programming
Topic: Disable screen update
Replies: 12
Views: 417

Re: Disable screen update

(Ignore, I hadn't fully understood your requirements!)
by VectorEyes
Thu Apr 30, 2020 2:23 pm
Forum: programming
Topic: Disable screen update
Replies: 12
Views: 417

Re: Disable screen update

Well, you could set all palette entries to black!
by VectorEyes
Wed Apr 29, 2020 2:53 am
Forum: general
Topic: I wonder what this contains?
Replies: 18
Views: 972

Re: I wonder what this contains?

Hmmm.

"This listing conforms with eBay listing policies and contains only GPL software or Freeware/Shareware available freely over the internet This software does not contain or infringe on any trademarks or software licensing and is distributed freely Online"

... is that true?
by VectorEyes
Fri Apr 24, 2020 11:00 pm
Forum: introduce yourself
Topic: Hello everybody!
Replies: 24
Views: 1085

Re: Hello everybody!

If you’re interested in direct register control of the video hardware you’ve come to the right place! There are a number of people here who play around with such things.

Welcome anyway, it seems that you’re already working on some interesting projects. Looking forward to reading more about it!
by VectorEyes
Thu Apr 23, 2020 12:11 pm
Forum: new projects in development: games
Topic: RPG project
Replies: 103
Views: 4941

Re: RPG project

That looks promising, and I'll echo Lardo Boffin's sentiments that the Beeb could do with a 3D dungeon crawler a-la Dungeon Master.
by VectorEyes
Wed Apr 08, 2020 10:08 pm
Forum: archive requests
Topic: Missing BBC Games HELP REQUIRED!
Replies: 39
Views: 15322

Re: Missing BBC Games HELP REQUIRED!

Covid-19 Lockdown has put a dampener on my
ability to retrieve it from the storage unit I put it into shortly before I wrote that message, but I am hoping to sneak a trip there in the next week or two, so hopefully I should have an update soon... ish. Sorry it’s taking so long!
by VectorEyes
Mon Mar 30, 2020 9:23 am
Forum: 8-bit acorn software: classic games
Topic: Mr. Magus Is Waiting For You
Replies: 4
Views: 607

Re: Mr. Magus Is Waiting For You

My primary school was clearly behind the curve when it came to using computers in education. I can distinctly recall being shown the TV programme and having to write a short story describing what happened in Mr Magus is Waiting for You, but I don't think I had a single lesson in my entire primary ed...
by VectorEyes
Sat Mar 28, 2020 5:47 pm
Forum: 8-bit acorn hardware
Topic: How do you replace the rubber feet on a Master?
Replies: 5
Views: 416

How do you replace the rubber feet on a Master?

Not the most interesting of questions I admit, but I could still do with some advice. I have a Master whose feet have degraded to the point where they leave a strange sticky black goo over anything they touch. I've got some replacements, but I'm actually not sure how to replace them. Can anyone offe...
by VectorEyes
Sat Mar 21, 2020 5:34 pm
Forum: general
Topic: Today I received.....
Replies: 5903
Views: 555574

Re: Today I received.....

Two Amiga A2232 serial cards...

Anyone want to hazard a guess what I'm going to do with them?

IMG_1043.jpeg
by VectorEyes
Wed Mar 11, 2020 10:58 pm
Forum: 8-bit acorn hardware
Topic: 2 Questions... 1) Whats this? 2) Power supply... fizzzzzz
Replies: 4
Views: 382

Re: 2 Questions... 1) Whats this? 2) Power supply... fizzzzzz

Given that it has '1770' written on it, the board looks like a floppy disc controller to me. BBC Micros needed them fitted to be able to talk to disc drives. BBC Masters had them built-in. As for the crackling and the smoke, it's an extremely well-known issue. There are some capacitors in the PSU th...
by VectorEyes
Tue Mar 10, 2020 10:44 pm
Forum: 8-bit acorn hardware
Topic: What ports are you using (and how)?
Replies: 18
Views: 925

Re: What ports are you using (and how)?

All in my main development Master 128: Tube Internal: RaspPi CoPro Tube External: CMorley's Tube Serial adapter connected to Tom Seddon's BeebLink, for uber-fast filesystem access to my Mac when doing development. Tube external pass-through: For testing various CoProcessors! 1MHz bus: Connected to i...
by VectorEyes
Mon Mar 09, 2020 12:09 pm
Forum: 8-bit acorn hardware
Topic: Where to find retro kit...?
Replies: 8
Views: 774

Re: Where to find retro kit...?

Well, last week one of my colleagues gave me his old Master 128 and disc drive in exchange for me promising to make a donation to a charity of my choice. Asking friends and colleagues if they have old unused computers can certainly pay off. (Still haven’t found anyone with an ARM Evaluation System t...
by VectorEyes
Thu Mar 05, 2020 4:24 pm
Forum: archive requests
Topic: Missing BBC Games HELP REQUIRED!
Replies: 39
Views: 15322

Re: Missing BBC Games HELP REQUIRED!

Quick question, is the MIA list up to date? I've recently taken possession of several boxes of software and I'd like to see whether I could contribute missing titles to the community instead of putting them on eBay! It would also be incredibly useful to have a list of MIA educational software (alrea...
by VectorEyes
Mon Mar 02, 2020 10:52 am
Forum: new projects and releases: text and graphic adventures
Topic: The Darkness of Raven Wood
Replies: 117
Views: 16469

Re: The Darkness of Raven Wood

I'd buy it too. In fact I'd probably buy any new game released on the Beeb!
by VectorEyes
Sat Feb 01, 2020 1:43 am
Forum: 32-bit acorn software: other
Topic: Modern development environment for Archimedes
Replies: 4
Views: 970

Re: Modern development environment for Archimedes

Some gotchas / things that could be improved: [...] I could run the build commands from directly inside VSCode and/or use proper make - old habits die hard, I guess :- [...] You can do this. The tasks.json file inside the .vscode folder defines what happens when you 'Build' and/or 'Run' in VSCode. ...

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