NEED info for NEC UPD78C10G vintage processor.

[Hunchback Tech]

Hi people. I desperately need any and all documentation and information I can find for
this obsolete CPU. If anyone has anything buried in archives they can forward, that would be great.
Seems when NEC India closed down, all this stuff went to landfill.
What I have found on the web is just not cutting it.
Programming guides would be of most use and anything with examples.
About all I do is assembly and machine code.
Anything would be most appreciated, thanks.

Whats up is I am trying to hack a very old controler board not unlike a DM printer or scanner.
TYIA

[wotnot]

Got this one yet?



edit: maybe this

[Hunchback Tech]

Thanks wotnot, the book is a bit newer than the one I have so may help.
Like all the datasheets for the UPD78C10G, they only cover the A counterpart.
DE cyphering the op codes is my nightmare.
The controller is for an HF radio and has a bug I really would like to fix.
Problem with my disassembler is bytes interpreted as code, No other parsing.
Been trying to find the routines that send serial data to the head display and not having much luck with some obfuscated code.
Just hoping someone my have salted away something for this processor. Like me, I have hundreds of Gb going back to mid 80s butlittle for NEC.
Thanks again.

[Hunchback Tech]

Well, I am making great progress in spite. I found the routines that send string data to the display.
Now if I can find the key inputs. Just hope I don't have to pull the PIC and dump it.
There are many I/O pins to figure out.
Cheers