While waiting for mt D-A converter to arrive I copied the UV-EPROM (TMS27C512) binary using a TL866II+ tool, results were unremarkable and a coursery inspection matches blogger Kerry Wong's binary. I have another vintage UVPROM in the mail. Nice to have a backup in case of bitrot. I'm now wondering if I could edit the binary to implement *IDN in place of the present non-standard command as the GPIB commands are visible in the ASCII interpretation of the binary.