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This is slightly off topic but mcu dumpers appear to be in this thread. I posted in the SB yesterday about a mcu from a yamaha psr-11 synth I have that likely has an internal rom that would be nice to see dumped. OG said it's a yamaha marked hd63b01y0. I don't know if it can be electronically dumped or has to be decapped but either way I can't do it so if someone wants to and can, it's low on the priority list, I'd be happy to send it.
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I know kevtris was discussing a potential glitch attach on the hc63x01Y0 chips, which may also work, assuming the secondary security bit is not set (which disables execution and maybe also memory-mapped/non-port-register access of the external bus of the chip). The primary security bit just disables internal ROM readout.

Last edited by Lord Nightmare; 03/19/21 06:47 AM.

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There's undumped chesscomputers with a 6301Y as well. None of the chess engines by this guy are in MAME for that reason:
https://www.schach-computer.info/wiki/index.php?title=Danielsen,_Kaare (why a photo of Kasparov? laugh )
https://www.danielsen.com/resume.shtml

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Mattel Brain Baffler, it's on a MM78LA, not much documentation exists for this MCU.

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Game? No

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Tepid? Yes, according to Mattel Horoscope Computer

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Mattel Football 2

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FWIW, no other PPS4/1 handheld games in Sean's vault, but I'm sure a few others exist.
The older Mattel sports games are on similar Rockwell calculator MCU's from before they designed PPS4/1.

Other known devices with PPS4/1:
- Mattel Las Vegas (home pinball machine): MM77
- Brunswick home pinball machines probably have a MM76
- Bearcat BC300 supposedly has a MM76D
- Zoom Telephonics Demon Dialer has a MM77 IIRC. Sean has it, but there's not much to emulate if MAME doesn't simulate a telephone/phone line.

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For the dialer, is it pulse or tone dialing? It'd be fun to have emulated even if it just made DTMF tones. Much less so if it's pulse, of course.

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No idea, maybe Sean knows. Or it's in the documentation (I haven't read it thoroughly).
temp mirror: https://tsk-tsk.net/net/temp/demon_dialer/ (MCU desoldered, I don't think it's decapped yet)

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