Re: Laser 128 - 1MB Memory Exansion Card - Question?

[Robert Steinmetz <not-rsteinmetz@mindspring.com>]

Willi Kusche wrote:
> Hi!
>
> Robert Steinmetz <not-rsteinmetz@mindspring.com> wrote in message news:<4080CA65.1090503@mindspring.com>...
>
> > I have a 1MB Laser 128 Memery Expansion Card. It has 4 
> > banks of memory (8 chips per bank) of which only one 
> > is populated. Although I have the original box I don't 
> > have the original documents.
> >
> > Can some one confirm the requirements for memory to 
> > populate the remaining 3 banks?
>
>
>     There's a high probability that it uses 41256 chips.
>
> Willi

I've pulled the cad and the chips are HM502560-15. As 
far as I can tell this is 1x256k chip and I have room 
for 3 more banks of 8.

Can someone please provide more information on this 
chip and a source for them?

Is this chip compatable with any other common chips?

--
Rob

"Never ascribe to malice that which can adequately be 
explained by stupidity."