Sorry, I lost a "1", it is IC16.Please see page 57 of the manual "Metron_QA-45_-_Manual",IC16 is a 32-pin structure。
Regarding 27C1001, I mean, can you try to reverse the code? I hope to find (uPA0-uPA15), (uPD0-uPD7) and WRLCD, RDLCD, CSRAM, RWRAM, CSROM, OE, CSLCD, A17ROM, A16ROM, whether these signals It is the real p14-p22 pin position of IC15(22V10Z)
In other words,I want to know if the signals in the firmware are the same as those on the schematic I drew.
I'm not good at reversing firmware, so I hope you guys can help me, thanks