Quote Originally Posted by AK6DN View Post
An additional FYI I found actual 23-E32A9/23-E33A9 'XE' DELUA/DEUNA net boot devices that I had previously acquired (and misfiled).
I read these and converted to source/listings/hex files are they are now up on the website under: https://www.ak6dn.com/PDP-11/M9312/

Don
Interesting note: The embedded CRC-16 (the last word of the PROM) is incorrect in both these devices. It seems to be incorrectly computed. I don't know if this was by accident or on purpose, but that is the case. I left the CRC-16 in the source/listing as it is in the original physical devices I read. The only place these words appear to be used are in the M9312 diagnostic which reads and computes the CRC-16 value for each PROM, and compares it to what is stored in the last word of the PROM. The diagnostic will fail on these two PROMs. I just add this as a historical note at this point.

Don