[From KS10 microcode for ITS]

WRITE A RAM FILE WITH THE FIELDS REARRANGED SO THE 8080 CAN HACK THEM
The RAM file format appears to be:

4000 sequential CRAM locations starting at 0.  Each location is 96
bits expressed as 8 12-bit bytes and one padding byte packed into
three words.  Bytes are in right to left order within 36-bit words,
and also within the 96-bit words.  Thus RAM SRC through MARK are in
the right 12 bits of the first 36-bit word and J is in the middle 12
bits of the third 36-bit word.  Parity is even parity, computed
separately for the two halves of the word packaged on different
boards.