Issue No.11 - November (1975 vol.8)
D.A. Michalopoulos , California State University
Three Rivers Computer Corporation now offers PDP-11/40 and 11/35 owners the ability to microprogram their computers. This two-board option plugs into the EIS (extended instruction set) and FIS (floating point instruction set) slots of the processor. It contains 1,204 words of 80-bit read/write control memory implemented with 50 ns. TTL RAM.
D.A. Michalopoulos, "New Products", Computer, vol.8, no. 11, pp. 85-89, November 1975, doi:10.1109/C-M.1975.218813