10 Apr
2024
10 Apr
'24
8:44 a.m.
hmmm, now that you say that, it sounds familiar. was it the model 40 that could do 1620
emulation then?
<pre>--Carey</pre>
On 04/10/2024 10:25 AM CDT Jon Elson via cctalk
<cctalk(a)classiccmp.org> wrote:
On 4/10/24 07:18, CAREY SCHUG via cctalk wrote:
Nearly all the 360s were microcoded, so adding a
bit more microcode let them emulate 1400/7000 series computers as a standard optional
feature. (well the model 44 emulated the 1620, and probably the 95/195 could not emulate
anything since they were hard wired).
The model 44 was not microcoded. It had faster floating
point than a model /50 but no decimal or string
instructions. Emulation of these was done through trap
handlers. I would assume any other machine emulators were
done by something like an emulation wrapper program - like
Virtualbox or VMware. The model 44 had no channels, there
was only direct I/O (a set of 32-bit parallel input and
output registers) and a pair of cartridge hard drives inside
the CPU cabinet. Think DEC RK05s.
Jon