2009/8/5 McKown, John <[email protected]>: > Yes, but I vaguely remember some system that we studied in college which had > "writable control storage" where an authorized application could load in an > alternate ISA, well actually it would extend the current ISA because you > couldn't change the built-in instructions.
The 370/165 and 168 had a Load Microprogram instruction. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
