Subject: RE: When it rains VAXen it pours VAXen....(:+}}...
To: Carlini, Antonio <>
From: David Brownlee <>
List: port-vax
Date: 10/13/2000 11:07:28
On Fri, 13 Oct 2000, Carlini, Antonio wrote:

> I think it actually disables the on-board 1MB but I don't have that
> much technical info about the MicroVAX II so I cannot be absolutely
> sure.
> I'm not even sure whether the console has to work it all out
> or whether the hardware handles it itself.
> I don't see why it would matter to anyone with or without defective RAM.
> My understanding is that the CPU cannot handle RAM any faster than the
> 200ns it gets over the PMI so onboard RAM runs at the same speed as
> off-board RAM. Why does it matter where your dead RAM is physically
> located?

	If your 1MB onboard is defective then you could have a working
	system with 2 8MB boards. Alternatively an 8MB board with a defect
	in the last 1MB could be useful...

			       -- A pmap for every occasion --