Issue No. 06 - November/December (1983 vol. 3)
David Abrahamson , Trinity College Dublin
Entry time into the extended writable control store on the VAX-11/780 can be reduced to 200 nanoseconds by means of this simple hardware modification.
David Abrahamson, "A Fast Entry Path into User Microcode on the VAX-11/780", IEEE Micro, vol. 3, no. , pp. 40-43, November/December 1983, doi:10.1109/MM.1983.291183