On Mon, Nov 28, 2016 at 03:14:57PM +0000, Maciej W. Rozycki wrote: > > FYI, the VAX 4000-100/105/106 (KA52/KA54/KA54) systems have no backplane > of any kind and do not use Q-bus internally, except for the CQBIC (CVAX to > Q22-Bus Interface Chip) ASIC directly bridging one of the NCA (NDAL to > CDAL Adapter, or the north bridge in modern speak) ASIC's CP peripheral > buses to a mainboard Q-bus connector further wired with an internal cable > assembly to the pair of external connectors mounted on the backside of the > enclosure.
Thanks for clearing it up. Uhm, stupid question perhaps. But what is the CDAL, and what is it's role? > > For the record they are DEC P/N BC04V-09 (17-02048-01), though the photos > with the only listing I could find indicate quite a sorry state of the > cables offered I'm afraid. > That looks very familiar... I need to go look in the box with assorted DEC cables. /P
