Hi Bill,

> set nvr filename

Actually this is probably: attach nvr filename.

That connects the simulated non-volatile RAM of the motherboard to some 
non-volatile place to store the info the motherboard will put there.

The only thing the VAX simulator actually stores there is the default system 
boot device so if the system is configured to auto-boot it will know what 
device to boot from.

> set cpu 64m

Tells the simulator how much RAM the simulated system will have (64MB).  The 
VAX simulator can have various RAM sizes from 16MB up to 512MB.

> set cpu idle=vms

This tells the simulator that the OS you're running is VMS and to detect the 
system idle patterns that VMS uses to sleep when the system isn't doing 
anything (as opposed to simulating instructions which have no useful purpose 
but waiting for something to happen).  Simulating instructions will keep your 
host computer somewhat busy when it needn't be.


-          Mark


From: Simh [mailto:[email protected]] On Behalf Of Bill Cunningham
Sent: Saturday, March 5, 2016 11:54 AM
To: [email protected]
Subject: [Simh] how do settings help simh

    When I load a file with simh if I'm using the vax simulator for example. I 
use these settings:

set nvr filename
set cpu 64m
set cpu idle=vms

specifically the third for vms. Now it seems these are not really needed to me. 
How does it help the simulator or the simulation? Is it easier for it to use or 
view files? I really myself don't notice much.




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