Hi all, For a fun project (I am porting ULTRIX-11 to the PRO) I could use some help with figuring out some of the machines' internals. If you have info, please contact me off-list ! Cheers, Fred -- Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist Visit the VAXlab Project at http://VAXlab.pdp11.nl/ Visit the Archives at http://www.pdp11.nl/ Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA