Re: Help identify this 30-pin SIMM (markings) - old

["Ralph Wade Phillips" <ralphp@techie.com>]

Howdy!

"Blake Patterson" <bwpatter@bellatlantic.net> wrote in message
bwpatter-BF06A1.06543205042002@news.bellatlantic.net">news:bwpatter-BF06A1.06543205042002@news.bellatlantic.net...
> I am looking to upgrade my Mac Plus to 4MB RAM (max).  It has 4 30-pin
> SIMM slots.  A quick look into my memory box reveals 4 SIMM's with these
> markings:
>
> AAA1M300J-06
> NMBS 9222 V3
>
> ...on each of the 8-chips per SIMM
>
> A quick search revealed this:
>
> "30 pin (tin) 1 Meg SIMMs - 9) AAA1M300J-07 single sided chips"
>
> So it seems the -07 chips make up a 1MB SIMM (I am hoping these are 1MB
> SIMM's).  I assume the -06 v -07 is a speed issue?  I just need < 140ns,
> and these _must_ be faster than that.  Any verification?

        They should be 60ns SIMMs.  The only problem MIGHT be that they
latch on noise, and therefore give you the appearance of memory problems
that aren't really there.

        But they might not - it would be worth trying.

        RwP