[Simh] RSTS/E: Time and Date

[tiggerlasv at aim.com]

This MAY be caused by a known issue with Simh -

RSTS/E V9.x and above will default to a 50Mhz clock at startup,
when using any of the J11-B emulations.

It affects 11/73B, 11/83, 11/84, 11/93, and 11/94 emulations.

It has something to do with the way INIT detects the LTC speed.

You can either include a "SET CLK 50HZ" in your .ini file,
or you can select an "older" emulation, such as 11/23, 11/53,
or just the plain old 11/73.   ("SET CPU 11/73")

Don't bother with trying to "HARDWARE HERTZ 60" in INIT;
it will just flip back to 50Hz when you restart.

As info. . . .




T








-----Original Message-----
From: Zachary Kline <Z_kline at hotmail.com>
To: simh at trailing-edge.com
Sent: Tue, 18 Mar 2008 7:37 pm
Subject: [Simh] RSTS/E: Time and Date



Hi,

    I am probably quibbling about something which isn't worth the 
hastle, but I've found that my RSTS clock runs a little ahead of 
reality.  In one case it was around 8 minutes ahead. 

    I suspect this has to do with the speed of the emulated CPU as 
compared with the real PDP?  Would enabling the idle feature help?  Is 
there a way to keep the thing realistic?

    Also, is there a way to keep the date and time in NVRAM or somesuch 
so I don't need to enter it every time I boot?  Or is that entry a 
requirement?  I remember VMS somehow doing it.

Thanks for putting up with silly newbie questions.

Best,

Zack.

 



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