Apr 022016
 

I got an M92 PCB here that uses MASKROM’s from SHARP.
These MASK’s in particular are pin compatible for either 27C020, 27C040 or 27C080 EPROM’s.
It is possible to determine which to dump these as from the markings on the chip. They all begin with the ID LH53#, where # is the identifier of the size.
“LH532” = 27C020 dump
020

“LH534” = 27C040 dump
040

“LH538” = 27C080 dump
080

The remaining letters/numbers of the markings are unique to the game and location on the PCB.

 Posted by at 10:55 am