Search found 2532 matches

by tricky
Sun Jul 15, 2018 6:13 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 64
Views: 3450

Re: New version of Scramble for the beeb (going well)

Is it just the picture, or is there a problem with scramble?
by tricky
Sun Jul 15, 2018 6:10 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

Does PLLH allow the 50hz to be adjusted?
Might it be possible to remove the frame delay in the future?
by tricky
Sun Jul 15, 2018 4:02 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I've always thought that the TV uses the centre of the pulse. If it is easier to only support 7 or 8, rather than start + 1/2 width, I can change the rally-x default. I thought one of the scramble clones might have and maybe JCB digger. I have some old code and I suspect richtw might. Astro blaster ...
by tricky
Sun Jul 15, 2018 3:21 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I'm not near a beeb, but I would expect making the pulse wider would delay the effective timing and move the visible pixels to the left.

I believe rally-x works in the same way as 3d pool's scrolls, although i do tidy the sides.
by tricky
Sun Jul 15, 2018 3:09 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 64
Views: 3450

Re: New version of Scramble for the beeb (going well)

Glad it works.
How is your event going?
Looks a bit quiet ;)
by tricky
Sun Jul 15, 2018 12:36 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 64
Views: 3450

Re: New version of Scramble for the beeb (going well)

No changes to timing, but I have added hitting the saucers and their explosions (this took ~200 bytes). I think the main TODOs are: - player lives and deaths - shot, bomb and explosion sounds - joystick support - launching rockets - killing the base - fuel! I have 303 bytes left and some stack space...
by tricky
Sun Jul 15, 2018 12:27 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I nearly always change the h-sync pulse position as my screen is usual 4/5 the default width. I think supporting this for modes 0, 1 and 2 is most useful, after that the jump is quite large and software is more feasible. I will be offering other options for width and position in Rally-X, but having ...
by tricky
Sat Jul 14, 2018 6:46 pm
Forum: acorn atom
Topic: new to atom: ram rom mmc joystick
Replies: 18
Views: 267

Re: new to atom: ram rom mmc joystick

I already did ;)
by tricky
Sat Jul 14, 2018 6:32 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

Main Tis is1920x1080, can't check monitor at the mo.
I did have a mad thought about the new 1024x768 HDMI panel and adapter from pimoria pimoroni and a luggable Beeb.

EDIT: I also have a 1920x1200 DVI monitor.
by tricky
Sat Jul 14, 2018 3:16 pm
Forum: acorn atom
Topic: new to atom: ram rom mmc joystick
Replies: 18
Views: 267

Re: new to atom: ram rom mmc joystick

AtomMmc arrived today, had to bodge a power connector (which hasn't arrived yet) as I couldn't wait to try it. AtomMmc.jpg Was the original idea to solder it to the connector instead of the ribbon cable? I'm trying to find a good place to mount it, current options are: Leave it internal attached to ...
by tricky
Sat Jul 14, 2018 11:42 am
Forum: software: other
Topic: TMS-5220 & Arcade Speech ROMS
Replies: 19
Views: 417

Re: TMS-5220 & Arcade Speech ROMS

Great video, shame its 25Hz, but I guess 99% of the content is fine and 99% of people wouldn't notice the 1% wasn't at 50Hz anyway ;)
by tricky
Fri Jul 13, 2018 10:42 pm
Forum: projects
Topic: Elite BeebAsm Source
Replies: 4
Views: 179

Re: Elite BeebAsm Source

Thanks Kieran, top man (not the shop).
by tricky
Thu Jul 12, 2018 9:46 am
Forum: software: new games
Topic: Galaforce 3 Teaser
Replies: 9
Views: 369

Re: Galaforce 3 Teaser

Nice, I've been waiting for this ;)
by tricky
Wed Jul 11, 2018 9:26 pm
Forum: hardware
Topic: New Master Setup
Replies: 3
Views: 180

Re: New Master Setup

Nice.
It's nice to be comfortable at your beeb.
by tricky
Wed Jul 11, 2018 5:48 pm
Forum: introduce yourself
Topic: Just saying Hi
Replies: 11
Views: 188

Re: Just saying Hi

Welcome. If you had a beeb at home, an RGB to SCART cable and portable CRT from the charity shop do quite well, but not if it was at school I guess. Mode Daves = more chance of guessing someones name as I can never remember them! If you haven't already found it, bbcmicro.co.uk has nearly everything ...
by tricky
Wed Jul 11, 2018 5:40 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I have some 6 pin dins for my RGB to SCART cables and am happy to make my own cable if it helps.
by tricky
Wed Jul 11, 2018 5:34 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 64
Views: 3450

Re: New version of Scramble for the beeb (going well)

Thanks Tom,
even stranger.
The timing looks to be about 2 scan lines too early as opposed to 2 lines too late on beebem.
by tricky
Wed Jul 11, 2018 5:24 pm
Forum: hardware
Topic: Connecting SEGA Mega Drive and Atari controllers to the beeb
Replies: 32
Views: 1908

Re: Connecting SEGA Mega Drive controllers to the beeb

Made up a batch of minimal dual Atari adapters, may have made too many as I only have one Atari Joystick (the rest are SEGA).
AtariDual.jpg
Still, it was a good excuse to tidy the office a bit.
office_tidy.jpg
by tricky
Tue Jul 10, 2018 9:09 pm
Forum: acorn atom
Topic: Acorn Atom and AtoMMC
Replies: 3
Views: 125

Re: Acorn Atom and AtoMMC

Is the 6522 (white socket in the top left I think) required for the AtoMMC board?
by tricky
Tue Jul 10, 2018 1:44 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I would love to be a beta tester. I have a couple of HDMI monitors and several TVs, several scart cables and a couple of never used pi zeros. I do not have any Linux (or compatible) build environments, but I do have a couple of blaster/JTAG adapters. I also have a cheap USB scope which I am planning...
by tricky
Tue Jul 10, 2018 5:25 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

I was only looking to match a CRT, which would be twice the current resolution. Being able to do better would be nula territory. I'm not promising that I won't ask for it in future, or saying that nobody wants it now ;) From the CRT experiments that I have done, +/-1 on the width is OK. I did find o...
by tricky
Mon Jul 09, 2018 6:57 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

With the existing CPLD code and assuming that that code is reading MODE 0 width pixels, in which case, there would be two versions: 1. as is 2. start with four black pixels 0..3 .loop WAIT_FOR_PSYNC_1, read pixels 4..7. store pixels to buffer WAIT_FOR_PSYNC_0, read pixels 0..3 jmp loop or whatever i...
by tricky
Mon Jul 09, 2018 4:39 pm
Forum: off-topic
Topic: Are kids still as excited by school computers as we once were?
Replies: 16
Views: 319

Re: Are kids still as excited by school computers as we once were?

When I was at school, there wasn't one until I was 12 and then we had one for the whole school; a Sharp MZ80K. This caused great excitement in 0.3% of pupils (two mates and I) although the ratio may have peaked at nearer 3% later. My daughter is now 12 and can't stand computer lessons, whether it is...
by tricky
Mon Jul 09, 2018 4:29 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

... I have no idea if there is space in the CPLD to do this.... Somehow I doubt it. Dave I am hoping that it can be squeezed in to the PI (after h-sync and before the end of h-total) so that the CPLD doesn't have to know. I think you said (but I can't find it now) that the h-sync is passed through ...
by tricky
Mon Jul 09, 2018 12:06 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

Great goals.
7 could be extended to a circular buffer so that you can save what just happened.
I would like to add h-sync width/pos on the fly support and then add Beeb to converter communication via h-sync.
by tricky
Mon Jul 09, 2018 6:19 am
Forum: off-topic
Topic: I'm the new game reviewer for the Zzap!64 magazine
Replies: 6
Views: 484

Re: I'm the new game reviewer for the Zzap!64 magazine

That's great news, congratulations =D>
by tricky
Mon Jul 09, 2018 6:17 am
Forum: software: other
Topic: TMS-5220 & Arcade Speech ROMS
Replies: 19
Views: 417

Re: TMS-5220 & Arcade Speech ROMS

There is a program called image2bbc (I think) that runs on windows and outputs a file that can be *LOADed into screen memory on a beeb. (By DreamlandFantasy iirc). There are a few people on here who have modded beeb games. When I was writing my emulators for circus, ripcord, sprint and warlords that...
by tricky
Mon Jul 09, 2018 6:05 am
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 64
Views: 3450

Re: New version of Scramble for the beeb (going well)

Thanks Tom, I think that I set ESCAPE to reset, if not, I will.
Did you notice if the palette changes at the top and bottom were in the same place as the left or right?
by tricky
Sun Jul 08, 2018 4:35 pm
Forum: acorn atom
Topic: new to atom: ram rom mmc joystick
Replies: 18
Views: 267

Re: new to atom: ram rom mmc joystick

I am trying to avoid any more challenges at the moment ;) It is quite tempting though.
I am planning to take the atom to the shows that I do and want it to show its best side, although I'm sticking with composite for now.
by tricky
Sun Jul 08, 2018 2:34 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 186
Views: 6916

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

At last a good use for that £3 pack of 1,000 assorted capacitors that I accidentally ordered from China!