7 May
2025
7 May
'25
8:52 a.m.
On Wed, 7 May 2025, Steve Lewis wrote:
As the S/360 used microcode, I'm suspect if PALM
used some form of
microcode (which was developed at or near Boca Raton c.1971, but not much
is known about it -- we have its instruction set documented as early at
1972, and the "M" is PALM is said to be Microcode). Just unclear what they
really had going on in those SLT modules.
Yes, the PALM is a (by modern terms) microcoded CPU. The block diagram
and the processor data flow chart in the MIM show amongst the signals the
microcode ROS (control ROS).
People may have had that impression about the IBM
5100, but we've showed it
I wonder why, because the instruction set was documented in the 5100 MIM
that was distributed with every machine. The omitted that part in the 5110
MIM, though.
Christian