[Simh] Throttling the vax

[Hittner, David T.]

I suspect most people who run a SIMH VAX will be interested in the code.
I know I would be happy to stop my laptop from howling when the VAX
starts up and the laptop kicks up the fan.

Please check the big/little-ended-ness of your code if you'd like to see
it get back into the codebase.

You might look at redoing the VAX code side in C instead of in FORTRAN.
Since you admit that the code may not be the most robust, it would
facilitate later programmers to be able to work with C, which they are
already mostly familiar with if they do any work with SIMH, C++, or
Java. UnFORTunately, FORTRAN is a dying art. ;-)

Dave

> -----Original Message-----
> From: simh-bounces at trailing-edge.com 
> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Villy Madsen
> Sent: Sunday, April 23, 2006 12:55 PM
> To: 'simh mailing list'
> Subject: [Simh] Throttling the vax
> 
> Greetings All
> 
> well I have some code that does the job.
> 
> I am not guaranteeing that it looks nice - but it does work..
> 
> It'll throttle up within a second or two of the load coming 
> on, and then gradually throttle down over the next 10 to 15 seconds.
> 
> It uses a DN device driver to control a routine in VAX_CPU, a 
> Sleep routine in SCP.C (because I kept getting an error when 
> I tried to include window.h in VAX_CPU, and a fortran routine 
> that runs as a batch job on the vax - talking to the DN CSR 
> to pass info to the simulator.
> 
> The batch routine wakes up once a second to check the CPU 
> itilization..
> 
> I don't know how low this thing goes - because I don't trust 
> the meter on my W/98 box..
> 
> Villy
> 
> 
> Any one interested.
> 
> 
> 
> 
> Villy Madsen
> www.members.shaw.ca/villy.madsen
> 
> 
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