22 Feb
2018
22 Feb
'18
2:54 a.m.
Guy Sotomayor Jr wrote:
Hercules uses posix threads, not forks, however, each device does not necessarily
get it's own thread. It's pretty portable stuff though. With very few tweaks,
I run it on VMS.
Regards,
Peter Coghlan.
On Feb 21, 2018, at 12:19 PM, Rich Alderson via
cctalk <cctalk at classiccmp.org> wrote:
From: Guy Sotomayor Jr
Sent: Wednesday, February 21, 2018 11:24 AM
I haven?t looked at KLH10 in a long time, but Hercules runs on a lot of different
platforms
including Windows (and I would not call that a Unix variant by any stretch of the
imagination).
> 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.
TTFN - Guy