simh simulation speed

From: John A. Dundas III <dundas_at_caltech.edu>
Date: Mon Sep 27 16:27:47 2004

At 12:23 PM -0700 9/27/04, Tom Jennings wrote:
>I haven't had a chance to get back and debug, but is it true that simh
>does NOT simulate the target machine's execution speed?

That is true. No attempt is made at mimicking the original CPU speed.

However this does cause problems for some I/O devices. In some
cases, extra code has gone into working through situations in which
an OS makes implicit assumptions about how quickly an I/O operation
will complete. Sometimes SIMH executes these too quickly and much
fun ensues.

John
Received on Mon Sep 27 2004 - 16:27:47 BST