On Sun, Mar 12, 2000 at 08:14:19AM -0500, Daniel T. Burrows wrote: I thought that was the BA11-VA? That's what mine say on them anyway, and yeah they look very much like a TU58, but with a 4x2 18-bit backplane. Easily wire-wrapped to 22 bits, and I hung a piece of perf board with a PIC CPU off of the BEVNT line on one of mine to count a 32 kHz watch xtal down to 60 Hz (since the PSU doesn't drive BEVNT in this box), so that it could boot RSX and RSTS from a Zip drive. All because I couldn't remember what the old chip was that could divide a colorburst xtal down to 60 Hz, Allison has since told me it was the NS5363. *Very* practical box for a PDP-11, it's smaller than a PC even... John Wilson D Bit