A new firmware update for the 7800GD has just been released!

Firmware 26.01.2266
Added colour kill support for greyscale display
Potential fix for ADPCM audio playback glitching (Rikki & Vikki, etc)
Added save and load state of ADPCM audio

Well, I wasn't really expecting this to work, but here it is! I've been playing with a DVI video card for the MegaST's mega bus and have been able to get perfect video mirroring for the shifter output even with the most complex tricks.

That’s both wtf!? and beautiful all at once. I’m glad I don’t have to install these… You’d want a clear case so you could appreciate the craftsmanship!

My first demo in over 30 years, and another 4K intro! 4K is plenty big enough, right?

Very pleased to get 1st place at SV2K25WE. Next up is Revision, I think.

This is a tribute to part of the Offset Overdrive demo, pressented on the STE in beatiful fullscreen!

Quick project to have a play with the Trion BGA256 part, a Mega ST DVI graphics card! Looks good, just need to try and populate it. I’ve had good luck with smaller BGA’s, so here’s hoping…

RetroHQ are proudly sponsoring SillyVenture 2025 Winter Edition this year! And entering the ST 4K intro competition.

Exoss’s replacement DIY PSU now fitted with the voltage conversion / regulation blocks and installed into the Mega. We’re now up and running again.

I got my old Mega ST out of storage to have a play with at the weekend and it was dead. The PSU made some clicking sounds, so powered it via the bench supply and got it working. So for an more permanent fix i ordered Exxos’s DIY PSU replacement.

I've been playing with more 4K demo coding recently. Huge thanks must go to @Virgill74 for AKlang and @leonard_coder for LightSpeed player and TinyPaula! And also Blueberry / Loonies for Shrinkler which makes so much more possible. It's amazing what you can fit into 4K.

If

I've finally actually done something! It's only been 30 years since my last demo compo entry.

I'll be entering at SV 2K25 WE.

For those in the US, Stone Age Gamer now have the Mega Multi! Grab one for some joypad action on your computers.

Cute little Taito L system repaired! Was missing the ROMs and GAL. It would have been repaired much quicker if I had realised programming a GAL16V8 without specifying it was a D part meant it didn’t work!

New 16mb Falcon memory module working! Found some gerbers online and a 16mb SIMM in a box. Combined the two and, voila, 16mb Falcon for a few quid!

I finally got around to building up the Atari ST USB development cart I designed some months ago. I get a download speed of about 720kb/s over USB from the PC. I’d say that’s fast enough!

Wow, that's insane. That's a huge undertaking, and I've just had a look at the code, it's very nicely named and doumented!

The Mega Multi is finally about to start appearing with retailers. Sorry for the delay, they've been ready to go for a while, but with one thing and another kept getting delayed.

Support for Atari ST, Atari XL/XE, Amiga, CD32 (7 button), C64, VIC20 and Spectrum (Kemptson…

I wanted a super-simple USB dev cart for the ST so I can play around with code very quickly on real hardware. So here it is!

Inspired to get this done by all the cool stuff coming from @RetroRacing and @keithclarkcouk. The plan is remote reset and fast code upload over USB.…

This is great! For those who remember cool and bizarre home made hardware from their youth that you built from a magazine, this is a fantastic re-visit. Well worth a watch and a great way to get into electronics. Make something simple that works!

Holy cow, watching TV programs and reading magazines from the 1980's is so refreshing! They encourage you to build things out of electronic components, type in your own programs and participate in actual technological advances! No wonder it bred a generation of techies.

Argonaut is a legandary name in the industry, I was massively lucky for it to be my first job and it's fantastic to see the head of the multi-coloured Argonaut again. Can't wait to see more come out of this. Congratulations all involved!

An arcade joystick I made from an old JAMMA cab control panel about 25 years ago has now been re-wired for super-gun use! Much easier than poking wires into connector blocks.

Some more improvements on the Jaguar voxel engine and a quick video! Doing stuff like this is my equivalent of giving my brain a holiday.

With lower quality settings it achieves a pretty consistent 50fps. Voxel resolution is 160x200 rendered to a 320x200 image.

The voxel map…

A bit of optimisation by using the blitter to do the height map traversal and store it locally for the GPU to iterate linearly has given a good speed up, now getting a good 25fps at an acceptable visual quality. A bit chunky, but good for the era!

A quick rest from doing useful things, a voxelspace gpu renderer for the Jaguar! As voxels seem to be all the rage. GPU only rendering, no blitter, 160x200 running at 15fps.

For those of you who have a Jaguar GD and are looking for something new, why not support the awesome Reboot Games who are continuing to support the Jaguar even today!

Head on over and see if anything takes your fancy:

There's another JagGD firmware update for people to grab. It should help again with CD stability and fixes some issues with memory track on homebrew (notably Yopaz and Alice).
Usual disclaimer applies: it's still not perfect and is unlikely to ever be, but it's improving.

Rather exciting, some long unseen Atari gerbers are being recovered! Falcon040?!

Not of interest to many, but I’m pleased with myself. My New Years resolution — half trail marathon this year. Going well, 10 miles trail running with 1000ft of climbs today. Furthest I’ve run. And with my trusty canine companion! Always nice to have company…

Pace was a bit…

Absolutely insane project, I love it! Great to see the progress.

I now have a way to test MSX joystick compatibility!

I’m feeling knackered and ill so I decided to do something fun. I’ve built up a T20 DVI out test board I designed ages ago and I’m pleasantly surprised I can output 720p directly from the LVDS outputs via a PTN3366.

Ahhh, I'm definitely getting into the 'adding too much' phase of testing and bug fixing for the MegaMulti. I've now gone and added a Mega7800 mode so you can use the Mega7800 multi-button features as well.

Jetpac with the MegaMulti is good! B for thrust makes it a lot more enjoyable to play. #retrogaming

New 7800GD firmware released!

Firmware 23.12.0639
Added a few more games to the break warning list
Fixed instability issues with serial debugging

As I'm doing a general multi-system version of the Mega7800 for Atari style joystick pinouts, I guess I should do a MegaMSX as well?

A composite modded spectrum plus before 10am? I’ve over achieved already today!

3 button joystick input from a megadrive controller on a C64? Sure! Why not, eh? Made possible by the MegaMulti.

7800GD firmware update released!

Firmware 23.11.2863
Added support for 2600 EF mapper (Zippy the Porcupine)
Added auto-fix for bad headers for known ROMs

This is the first use I’ve had for stripboard in years. It’s awesome! Super joyport sniffer.

7800GD Firmware Update 23.11.0741
Fixed an issue where the POKEY was out of tune under certain circumstances. Noticeable in the title music for E.X.O.