That could make for some VERY interesting results from a bad branch...maybe that's why modern PCs sometimes wedge to the point of needing a power cycle: they've reimplemented this technology! :-D
On Mon, Dec 30, 2013 at 2:55 PM, Tony Harminc <[email protected]> wrote: > On 30 December 2013 10:31, David Andrews <[email protected]> wrote: > > Though the wikipedia article doesn't mention it, my recollection is that > > Magnuson's M80 system was microprogrammable by the user. Anybody > > remember/use that? > > Much earlier the 370/165 and /168 had a Load MicroProgram instruction > that loaded microcode from main storage. X'B9', iirc. Used by OLTEP > tests, I think. > > Tony H. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- zMan -- "I've got a mainframe and I'm not afraid to use it" ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
