So it seems like there's an(other) error in the DEC documentation. If one looks at 11/70 Maintenance Manual (EK-11070-MM-002), it says (pg. 1-3) that the KB11-C (11/70 later CPU) contains an M8133 ROM and ROM Control board, the same as the KB11-B (earlier CPU, pg. 1-4), _but_ ... The KB11-C prints include the drawings for the M8123 (also used by the KB11-D, the later /45 CPU). Other manuals confirm that the KB11-C uses the M8123 (see, e.g., the KB11-A,D Maintainence Manual, EK-KB11A-MM-004, pg 1-1). I _thought_ the KB11-D used two of the same boards as the KB11-C, but then, when I went to check, to be sure I had the correct info (before sending out my email intended to "just want to be accurate", sigh), I relied on the DEC manual... :-( Oh well, that's what I get for relying on DEC manuals! :-) Noel