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Wow, what a line up! Please put me down for afternoon & evening.

tricky wrote: ↑

Thu Feb 25, 2021 2:43 pm

As Kieran implied, I do have a bit of a thing for 50fps, especially on a CRT, it's just so smooth

I was thinking you’d list out your games & conversions that run at 50Hz - probably all of them!!?

I was thinking about how to get a consistent 25fps if going for that. I thought maybe to have an IRQ on the vsync event that increments a counter. And then have the main loop of the game, once it's finished doing it stuff, polling that counter looking for the right value before waiting for the next...

Soruk wrote: ↑

Wed Feb 03, 2021 2:00 pm

guesser wrote: ↑

Wed Feb 03, 2021 1:29 pm

Soruk wrote: ↑

Wed Feb 03, 2021 12:00 am

the Parrot of Doom

I shall have to adopt that name for that test

I can't take any credit for that, that's from scarybeasts' disc menu!

That’s my creation, sorry!

Hi Arcadian. Please put me down for the afternoon & evening. Thanks!

Well, I think the beeb could do with more than one new shmup, and since you are going to write one anyway, you might as well start now ;) You know how much better it could be on the Master and that I will be targeting the beeb with one or two sideways RAM/ROM banks. Factor in my zero creative talen...

As you’ve clearly run out of arcade ROMs to port I think the time has finally come for you to start developing that R-Type inspired sideways scrolling shmup. Mostly so that I don’t have to write one later.

Just a note that the emulator in the Owlet editor is now interactive - just click in the window! This is the ONLY way I ever want to write BASIC from now on. Check it out at https://bbcmic.ro.

Hi all, I hope the CRTC Register Masterclass session was helpful for people and apologies again for the interruption halfway through! I've sent Arcadian the PDF version of the slides to upload alongside the video when it eventually arrives. In the meantime, these are the two demo programs in BASIC: ...

I’m hoping my session will be closer to 30 minutes than an hour but I’ve yet to run through it all. There are some slides but want to make sure there’s more time spent on practical examples. This may or may not generate questions depending on whether I’m lecturing to the already knowledgeable! EDIT:...

After a few months away from the (retro) keyboard, my new year's resolution is to start on some new projects and do some more Masterclasses. To that end, I've prepared An Intro to CRTC Registers (part 1) for Thursday evening. In this session we can cover: A high-level overview of what the CRTC actua...

This is great! It's also been on my very long backlog, for a very long time, to write a Tracker on the Beeb - shame there wasn't one available BITD.

Edit to add: On a Master, this variable lives at &2CD! So this just demonstrates the pitfalls of trying to do hacky things with the OS. I would be inclined to implement your own IRQ handler and only restore the OS one when you access the disk (this may not even be necessary, but is probably rec...

All the info you need about memory usage (and what you can feasibly steal) is here: http://mdfs.net/Docs/Comp/BBC/AllMem

I figure I should just share this here, rather than leave it languishing on my PC. Although I'm no longer actively helping with the development of BBC AGD, I did have some success a while back converting Foggy's Quest by Dethmunk into MODE 1 to give it a bit of colour (the Spectrum version looks gor...

Thanks again for organising! Please put me down for the afternoon and evening.

If you found some suitable VGM files for music then you should have come talk to us Bitshifters! Try taking a look at https://github.com/simondotm/vgm-converter and https://github.com/simondotm/vgm-player-bbc from simonm. Drop me or Simon a PM if you need any help getting it going. Keep up the good ...

Unfortunately (well, fortunate for me) I'm away on holiday on that Thursday. I will endeavour to attend the following session in November and maybe even see if I can get the CRTC Registers masterclass together by then.

Not sure I will be able to make it tonight but will pop in if I can.

I understand it wouldn't look pretty with the two blank scanlines creating a dashed line effect unless I also changed the value in CTRC register 9 to 7 to remove the blank scanlines, but I wonder if anyone else has tried such a thing? If you want an equivalent of MODE 0 or 4 but with just 25 charac...

Great work, as ever! It is super-smooth and responsive. The coyote time jumping is absolutely essential and become a gameplay feature I see. If I was going to be critical then I would say that the collision detection is a bit too coarse at the moment. Would it be possible to make this pixel-perfect?...

What a list of contributors! And the book looks like a really high quality edition. Really looking forward to reading this.

A modified MODE 1 (256x256) on the Beeb would save 4K and you only have to inc/dec the hi byte of the screen address to switch char rows. A square MODE 1 (256x256) on the Beeb takes 16K but you still need to increment two pages to get to the next character row as there are 64 columns * 8 bytes per ...

0xC0DE wrote: ↑

Wed Sep 23, 2020 4:24 pm

Thanks for all the positive comments and suggestions for improvements. There will definitely be a Beeb version! Actually, it will be a multi-platform version that runs equally well on either system (as games should!).

Beeb version in MODE 1 maybe?

Ooops, yes, I'll be there tomorrow. No Masterclass from me this time though! (I have CRTC register programming and maybe Video ULA 101 on the backlog though.)

And again, good job with this port. It's a funny little game, that I'd also never heard of, but quite addictive once you get into it, as you say. I love the NULA version in dreary grey, very authentic! I think I like your MODE 1 colour choices better. Enjoyed the video again too.

So many games! You have been busy Tricky. Great work once again, and also enjoyed the video a lot hearing about your history with the game and the details of how it works. Good stuff.

Excellent work Tricky, as ever! And a fantastic video, really interesting to hear about the details of making the game.

Now, about that 6502 copro version with line drawing in MODE 0.

I'm looking forward to catching up with some of the presentations I missed. The ones I saw were very inspiring and it's great to see people still developing for the Atom, Beeb, Electron and Archimedes. Kieran, your 'introduction to timer interrupts' was superb! I remember trying to work out this st...

Nice to see everyone last night and thanks again to Arcadian for organising. I hope the Intro to Interrupts session was practical and useful. All the text and asm code can be found on GitHub: https://github.com/kieranhj/intro-to-interrupts. In the spirit of improvement, please feel free to PM me wit...