[Info-vax] VMS VAX and SimH VAX

[Paul Sture]

On Fri, 06 Apr 2012 16:59:42 +0200, MG wrote:

> Is it possible to allocate more than 64 Mbyte of RAM?  I've tried 512,
> 128 and previously also 96 Mbyte (like used in Paul Sture's example
> configuration), but only 64 would be recognized.
> 

No 96M didn't work for me, giving a syntax error with current versions of 
SimH (maybe it was failing silently on older versions, I don't know).  I 
changed it to 128M and that is seen by my system.

You need to run AUTOGEN after adding memory before VMS sees it.

$ @SYS$UPDATE:AUTOGEN GETDATA SHUTDOWN NOFEEDBACK

and reboot.

Let's try that here:

After changing the SimH initialization file for 512M:
$ sh mem/phy
              System Memory Resources on  6-APR-2012 21:19:40.54

Physical Memory Usage (pages): Total        Free      In Use    Modified
  Main Memory (128.00Mb)      262144      191046       66606        4492

then AUTOGEN and reboot:

$ sh mem/phy
              System Memory Resources on  6-APR-2012 21:19:40.54

Physical Memory Usage (pages): Total        Free      In Use    Modified
  Main Memory (512.00Mb)     1048576      939213      105294        4069


-- 
Paul Sture