@Chronos42 - Your firmware is OK, thanks, waiting for a 1061A.
@Capt B. Leider, your reader's A11 signal is bad (stuck in 0) and the eprom content is bad

, please remove the post or edit it or some poor sap will flash them and crash his Datron and/or calibration data !!!
How do I know:
1) The first and bottom half are identical, this is why M18 was looking unprogrammed, because it's half fool.
2) On M30 the last 8 byte are the main vectors of the 6800, especially the last two bytes, these are the actual start address, and on your capture, they make no sense.
Cheers and waiting for a good readout,
DC1MC