19 Sep
2015
19 Sep
'15
2:25 a.m.
On 18/09/2015 14:33, tony duell wrote:
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
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
Is an overlay self modifyig code?
Rod
--
Wanted : KDJ11-E M8981
KK8-E M8300
KK8-E M8310
KK8-E M8320
KK8-E M8330
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.