Sean decapped the 1st-gen Mattel handhelds. Actually that's old news but not well known, he did those a few years ago. Just that the opcodes weren't figured out until now, and now the MCU they're on is finally emulated in MAME. He made a webpage covering this, read more about it over there if interested! https://www.seanriddle.com/firstmattelledgames.html
I think this plus PPS4/1 covers all Mattel games that were on Rockwell MCUs. There are a few unemulated Mattel LED games, but on different MCUs. Sub Chase and Armor Battle are on a Hitachi MCU, and IIRC Bowling and that weird Alien detection toy are on COP400.
Very cool... I had a Mattel Baseball growing up.
I see scans of all the chips... any chance someone scanned the front faces of these also, to eventually do external artwork? (And side note... same question for any of the other handheld games I've been seeing added over the past two years).
Also... thank you... I was able to get the Microvision scans.
RELAX and just have fun. Remember, it's all about the games.
