A Moogle  🏳️‍🌈 💻 🎮 🎶 🇸🇪

Almost! +5V to EA will simply disable the internal ROM, it won't put the chip into programming/verify mode. For that you'll need to supply EA with anything from +7V to +23V, depending on the part. Word is +23V is for EPROM parts, +7V to +10V for mask (which these are).

The NEC 8041 datasheet also doesn't give instructions on how to program the part or verify the programmed ROM, unless I'm mistaken. So I would understand it saying 5V to be "nominal" as saying that under normal operation, EA should only be at +5V.

I linked you to a script for dumping 8041 chips previously via e-mail; are you following the exact sequence as found in the script? Are you willing to share logic analyzer screenshots of the signals going into / coming out of the 8041 so that I can solicit input from other devs?

It looks from the schematic that you have /RESET tied to +5V at all times. Meanwhile the instructions I have for the I8741 (a similar/equivalent chip) say to power it up with /RESET at 0V.

Alright, will do. I've also sent an irate PM to the dev who posted his dumping script to a site that apparently fucking expires posts within 48 hours, asking him to repost it on a better site... :|