I have the dump of the DC-11EM board monitor ROM's available. The ROM dumps are available here (in HEX, BIN or ROM format), and I can burn new eproms if you want. My Email address is on the bottom of the left vertical pane. I've tested 27C64 EPROM's or 28C64 EEPROM's successfully.  The files are named from the socket designation, E53 (left) and E45 (right) :  |