I now have full stereo audio support on the MegaDrive2 style RGB video connector! This includes TIA audio, POKEY and YM2151. All audio is generated on the 7800GD, so no issues with volume levels between sound chips — all mixing will be user configurable.

Another end of day photo! RGB out is working remarkably well! Still some glitches, but extremely encouraging progress.

And all of this just from a cartridge… crazy, huh?

And to finish the day off, here’s the first bring up of the 7800GD RGB out! It’s very broken, but it’s a start!

Start of save state support and full 6 button pad support with 7800GD!

MegaDrive 6 button pad reading working nicely on the 7800 with the Mega7800 adapter. The code is pretty compact reading both ports at once, so two Mega7800 adapters can be read together.

I will be making good use of this in the 7800GD and can be used in homebrew also.

Finally grabbed a couple of hours to put the Mega7800 together, and I’m pleased that it’s working perfectly!

This is MegaDrive (wired plus wireless) pad support for the 7800. Next I will be adding 6 button support for 7800GD (and potential homebrew) support.

A quick side project, the Mega7800! It's a MegaDrive pad to 7800 converter which has button remapping, 6 button support and allows the 7800 to read all buttons. That's the plan, anyway!

The main reason for this is so I can hit START to get to the in-game 7800GD menu.

The next batch of Jaguar GameDrive carts have shipped to retailers today. I would expect restocking sometime next week.
As I have mentioned before, this is likely to be the last batch of these carts until around December due to the ongoing component shortage.

More 7800GD progress being made! 2600 mode is back up and running again.

Now onto more testing, tidying and bug fixing.

Finally! That was a pretty huge effort, but the 7800GD is running with the embedded RISCV CPU doing everything. Only the basic direct ROM mapper running, but it will now be quick to get the rest working again!

The next thing to play with has arrived… #NeoGeoPocket #RETROGAMING #RETROGAMING#NeoGeoPocket #RETROGAMING https://t.co/94vZoceS1l

For those who have been playing with the Efinix chips, I've written a standalone FT2232H SPI programming tool which works with the pinout the Efinix tools use.

This tool importantly leaves SS_N and CRESET_N tristated on exit!

First stab at a new NeoGeo Pocket GD using parts I can actually get hold of this decade!

Most importantly, what to call it? NeoPocket GD Ultra, R2, G2, PRO, X... any thoughts?

I've tidied up the source code for the JagGD command line tool and have released to GitHub. Most useful for those wanting to port to other machines, but may also be handy to include functionality to talk to the JagGD from your own tools.

Omg! New injection moulded shell prototypes for JagGD have arrived! They are absolutely beautiful and perfect. Very very happy!

Now to order a proper production quantity and get this next batch of carts out.

@aerobatic Argonaut's Starglider II running the the Atari Jaguar via a @TheRetroHQ JaguarGD drive!

Would you be interested in allowing an official release of this port? Please DM me if so! :)

@TheRetroHQ JaguarGD drive!

Would you be interested in allowing@aerobatic Argonaut's Starglider II running the the Atari Jaguar via a @TheRetroHQ JaguarGD drive!

Would you be interested in allowing an official release of this port? Please DM me if so! :)

https://t.co/CuXnzGTqL6

We are currently working on a new game called Dracula for ColecoVision. There's about 20 rooms already done and we're planning to have around 50 different ones in total.
Dracula is going to be the most ambitious ColecoVision game ever made, without using ANY special hardware.

This is the most fun I've had playing with Verilog by miles. A working RISCV core with debugging support being simulated with Verilog and interactively probed with GDB via OpenOCD. With some screenshots for proof!

A mix of the awesome work of @ultraembedded and @wren6991. @wren6991@ultraembedded and @wren6991. https://t.co/0DB2rNUnuc

Finally!! A new batch of LynxGD PBS’s has arrived!

Arrived today, AliExpress did well here! Another awesome project lined up…

Atari 2600 games are now also running on the 7800GD. So far just unbanked 2K and 4K ROMs, but the rest will come quickly now the framework is in place.

My new review is live, compliments of @TheRetroHQ for providing the NeoPocket GameDrive for review. It's the most in depth review I've done in 2022 so far! I had a blast with it. @TheRetroHQ for providing the NeoPocket GameDrive for review. It's the most in depth review I've done in 2022 so far! I had a blast with it. https://t.co/eS3vO9j9eZ

BupChip audio is now fully functional on the 7800GD, so Rikki and Vikki now has it's lovely soundtrack! I will also be aiding @Kitrinx to get the same support added into the 7800 core in MiSTer. Many thanks to @tailchao for his help in getting this all working! @tailchao@Kitrinx to get the same support added into the 7800 core in MiSTer. Many thanks to @tailchao for his help in getting this all working! https://t.co/a3leYkWq3z

That went quicker than expected! Games starting to work (with POKEY!) on the new Trion based 7800GD board. The Efinix dev tools are a bit clunky and rough around the edges, but everything needed is there.

Now that's very good to hear!

The latest Trion powered 7800GD variant! It doesn't work yet, so this is a monumentally dull post, but now I have a jumping off point to start playing around with it.

The FPGA is configuring and the microcontroller is awake, so things are happening! It just doesn't work.

New Video: Highlander on the Jaguar CD (Using Jaguar Game Drive)

@krikzz I don’t do that any more… maybe I should! I used to have one of these as a kid and loved making projects. Sadly neither of my two girls are interested in electronics. Maybe one day… @krikzz I don’t do that any more… maybe I should! I used to have one of these as a kid and loved making projects. Sadly neither of my two girls are interested in electronics. Maybe one day… https://t.co/s6qOEQAgqx

This is totally cool. Building your own computer from off the shelf chips is one thing, but building your own IC’s is a whole new level of genius insanity! Much respect.

I've now moved the 7800GD design over to using a Trion FPGA and have just ordered a prototype PCB. Definitely time to take a week off while that wings its way to me!

I still can’t fathom how an image like this gets turned into logic. It really is the best kind of witchcraft! Absolutely amazing work and it just keeps coming.

Wow, cool, I’d never thought of using a metal brush for a quick larger area continuity check. That’s genius!

7800GD feature reveal! I now have the ability to break into and return to running games. This will lead on to things like save states and game genie style cheats.

That's now all the original commercial games running on the 7800GD on NTSC, including built-in POKEY support! I am aiming for dual POKEY and YM2151 support for final release.

7800 GameDrive direct mapped, SuperGame banked and Activision banked games now supported and working. A few crashing, but largely working now. A few more mappers to get through then onto POKEY.

JagAIOA Plus now in stock in very limited quantities. RGB, S-Video, Composite, and Networking for your Jaguar. This is was an unplanned adapter I've built for a people who wanted all the signals from the AIOA with JagNet support.

BIOS is now fully booting into games on #MiSTerFPGA PlayStation core with the latest fix. No more forced fastboot. This also fixes some games, e.g. Glover is now playable. #MiSTerFPGA PlayStation core with the latest fix. No more forced fastboot. This also fixes some games, e.g. Glover is now playable. https://t.co/OMAhwOndyj

7800 GameDrive coming on nicely! Basic mappers and game selection working. Moving onto banked mappers.

The 7800 is starting to do things...

The 7800GD lives! Step one, make screen yellow. Step two, run all games. Nearly there!