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Can someone to help Ricardo
He´s writing a book about 2nd gen consoles.

Norseman, the best Vpac plus game, was released for Intv:
http://www.youtube.com/watch?v=PRo8IV5X0v8&t=126s

I would be immensely grateful if anyone has more information about how Odyssey3 was developed:
- Who were the people involved.
- Because Philips launched in Europe but gave up on the US and other markets.
- How many units of VideoPac G7400+ were produced
- How many Odyssey3 prototype units were built.
- Which games were released for the G7400 and which ones never saw the light of day.
- Any other information or curiosity.

Grateful!   

Not exactly sure I fully get what's going on, but if I understand correctly, you should be able to use the bios routines (anything from $000 - $3ff) since there is no way to override this rom area and is always present. If you jump to the select-game routine, in theory you should then be able to completely wipe out and replace all cart data ($400 and above) without the machine crashing. That is, I assume you have some other CPU doing the SD reading and RAM loading?

Hey Ted, thanks for the reply.

I believe the problem is about the moment that I change the "rom". The firmware is a rom too, right? So, at some point, the user selects the file to load, and I lose a few milliseconds to load the file from SD.
My guess is the videopac CPU is hanging. even if I force a few opcodes for the rebooting, I believe the CPU already lost control.

Guessing here, maybe the correct way is to pause the CPU somehow? Anyway, I',m still trying to figure it out.

Not sure if clearing PSW is necessary or not, but there's a routine to reset everything at 01fh

Code:

REBOOT
   CLR A        ;not sure if these are needed
   MOV PSW,A    ;not sure if these are needed
   CALL 01Fh    ;call to INIT routine
   JMP 0400h    ;jump to cart's SELECTGAME routine. To jump to bios' routine, change to 02c3h

Very Nice!!

Thanks for sharing, I didn't know such a thing existed.  For those in the US, I think this is the Amazon US link:

[AmazonSmile : Divoom Pixoo -- Pixel Art Digital Picture Frame with 16x16 LED Display APP Control - Cool Animation Frame Wall/Desk Mount for Gaming Room & Bedside Table -Black : Electronics]
https://smile.amazon.com/Divoom-Pixoo-Digital-Controlled-Screen/dp/B07HHXWN3C

I hope Santa brings me one for Christmas this year...

Last year for Christmas, I get the digital frame Pixoo from Divoom. With this frame, you could also upload an app to your mobile phone. With this app, you could save small pixel art animations to your frame. You can save thousands of animations from people all around the world to your frame.

But because I want something special for my collection, I make my own pixel animations. And … yes. I made Videopac animations. For now, I have 15 different animations. From Munchkin, to the Dragon from Quest for the Rings, Space Monster, Super Bee….

My own Videopac creations I upload to the Divoom app, that every people, who has this frame could upload this for free to his own Frame. It looks wonderful. It`s difficult to make pictures with the animations, but they look like from the real Videopac game. And the frame is really not expensive. Mine was from Amazon, äh… Santa Claus.

Every Videopacfan with this Frame, I wish much fun with my animations. And maybe, there will be much more in the future, also from other people…

Here I bougth the frame:

https://www.amazon.de/Divoom-LED-Licht-Digitaler-App-gesteuertem-Schwarz/dp/B07HHXWN3C/ref=sr_1_1_sspa?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=divoom&qid=1631461798&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzUFc2SUdFVDVHNjgzJmVuY3J5cHRlZElkPUEwNDk4MDk1MkNaT1FTWVRZODUyViZlbmNyeXB0ZWRBZElkPUEwMTQ1MTE0MVpNT05OQTVaRzhFUiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

While my internet was down for several hours for some unknown reason, I decided to catalog my Odyssey 2 collection. Here is what I came up with that was in a big cardboard box full of Odyssey 2 cartridges.
http://www.atari2600land.com/odyssey2/myodyssey2collection.pdf
I'd take pictures, but it'd be hard because, you know, lighting.