On Fri, Sep 18, 2015 at 01:33:05PM +0000, tony duell wrote: > > > > > Are there any computers that do let you put microcode into RAM > > > now-days. > > > > "Now-days"? There are some that do that, some of which are still in > > operational shape. Some VAXen, in particular, have something called > > "writable control store", which is essentially microcode RAM. > > As far as I know, the VAX11/730 (There is one next to me waiting for me to > have time > to restore it) has the microcode entirely in RAM. Classic PERQs (3 in the > next room) have
The PDP-11 console loads the microcode from disk then mostly just sits there looking pretty whilst the VAX runs. > their microcode entirely in RAM too (in that case, there is a microcode boot > ROM to load > the microcode from disk, but it is switched out after the microcode is > loaded). > > > -tony > -- Diane -- - d...@freebsd.org d...@db.net http://www.db.net/~db
