PDP-11 Memory

[Bill Gunshannon]

On 1/9/19 2:28 PM, Henk Gooijen via cctalk wrote:
> 
> As far as I know about the 11/93 (or 11/94), all memory is on the CPU module.
> The 11/9[3|4] is sort-of an 11/8[3|4] with all (PMI) memory on the CPU module as the cache on the 8[3|4].
> 
> The 11/9[3|4] with 2 MB RAM can only be upgraded to 4 MB by adding RAM chips on the CPU module.
> However, all holes are filled with solder, so this upgrade is quite a lot of work.
> 

I was beginning to suspect as much as my attempts got nowhere.

My board has two empty spots with holes filled with solder.
That is not really a problem as I have a professional solder
sucker.  :-)  I assume these might have to do with addressing.
Then there are four that I suspect are the memory chips and
they are surface mount.  Not so sure I want to delve into
that as my eyes aren't what they used to be.  I guess the
first step would be to see if the chips are even available.

bill