21 Feb
2018
21 Feb
'18
12:19 p.m.
From: Guy Sotomayor Jr
Sent: Wednesday, February 21, 2018 11:24 AM
> On Feb 21, 2018, at 10:59 AM, Paul Koning via
cctalk <cctalk at classiccmp.org>
> wrote:
> Typically you'd emulate the I/O device
functionality, regardless of whether
> that is implemented in gates or in co-processor firmware. That's the
> approach taken with the MSCP I/O device emulation in SIMH, or the disk
> controller emulation in the CDC 6000 emulator DtCyber.
It?s also what?s done in Hercules (S/370, 370/XA, 390,
Z simulator) and the
mainframe I/O is complex to say the least.
Also the method used by the KLH10 emulator (KS-10, KS-10/ITS microcode, KL-10).
There, each device type runs in a separate fork, using System V style memory
mapping. This of course means that it only runs under certain Unix variants.
Rich