BDV11 ROM programs?

Does anyone know of anything that documents the contents of the various BDV11 ROMs? In particular, I'm interested in learning what the various halt locations imply. Yes, I know, I could dump them, and disassemble them, but I'm hoping to avoid all that hard work... :-) There seem to be two different ROM sets; 23-046E2/23-045E2, which seem to be an earlier set, as they only understand 56KB of memory; and a later set, SG8326-339E2 and SG8330-340E2 (which might not be DEC standard, the numbers on them are 'odd' - although they might be 23-339E2/23-340E2, the boot ROMs from the 11/23+), which understand up to 4MB of memory. (Interestingly, the latter set are on Intel D2716s, EPROMs, unlike the earlier ones, which are plain PROMs.) Thanks in advance for any help! Noel