[Simh] SET CPU 48M ?

[Hittner, David T.]

KA655.bin should support 64MB. It should balk if you set the memory size
too high.

KA655x.bin was modified to support very large memory - up to 512MB, I
think.

I'm pretty sure you have to AUTOGEN to see the new memory.
Try @SYS$UPDATE:AUTOGEN SAVPARAMS REBOOT

Dave

> -----Original Message-----
> From: simh-bounces at trailing-edge.com 
> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Bob Armstrong
> Sent: Friday, February 01, 2008 12:01 PM
> To: simh at trailing-edge.com
> Subject: Re: [Simh] SET CPU 48M ?
> 
> >Thomas Pfau wrote:
> 
> >ka655.bin is the original 3900 microcode that only supports 
> 16M of memory.
> 
>   Does anybody know the history of this restriction?  I have 
> a real KA655 (uVAX-III+, M7625) with 48Mb of RAM and it 
> doesn't have a problem with this.
> The standard DEC MS650-BA memory card was 16Mb and the 
> backplane (or rather the PMI jumper cable) could accommodate 
> three of them, so I wouldn't think that 48Mb on a 
> MicroVAX-III would be that unusual.  Is the KA655 ROM image 
> that comes with simh a really old version or something?
> 
> Bob
> 
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