Re: Can 30 pin 4 meg SIMMs be used

mike@bcinternet.com
Wed, 16 Oct 1996 09:18:53 -0700 (PDT)

On Wed, 16 Oct 1996, Robert Boyle wrote:

> At 05:44 PM 10/15/96 -0700, you wrote:
> >Can I use (2) 4 meg SIMMs in the PM2es and or do I need to fill all four
> >slots....
> >I have on hand a few extra 4 megs laying around.
>
> The PM2xx series of term servers use a 386 processor. This is a 32 bit
> processor with a 32 bit data path to memory. All 30 pin SIMMs are either 8
> bits or 8 bits + 1 parity (9 bits) wide. To have an addressable memory
> space, you need a 32 bit wide memory window (or 9*4=36 bits) So, yes, you
> must use 4 SIMMs regardless of whether you use 256MBx8, 1MBx8, or 4MBx8.

OK now I'm confused. I thought you needed 36 pin simms, can I use
30 pin simms? What's the difference between 30 and 36 pin simms?

thnx,
mike...