Re: Where to get RAM for IIGS

["Mark Cummings" <NOTfigjams@primus.com.au>]

Yes, the pinouts are completely different.
4256s are 256K x 4bit 20pin, where as 41256 are 256K x 1bit 16pin, so they
wouldn't even fit the socket.
It takes 8 of the 41256s to make 256KB or 32 to make a single MB.
The RamWorks 512K and RamWorks III (1MB) cards on the IIe and the Apple 1MB
expansion card for the IIc use 41256s.
I am not sure if Ryan has said what brand and model his RAM card is, that
would help greatly.
I was going to suggest looking at Tony D's web pages on RAM cards and chips,
but it appears he's changed his site and it's no longer there.

Mark


>> Oh, the EHP/EGPxyzt on the chips would be just a batch number, nothing to
do
>> with the type number TMS 4256-12/15. the 4256 would mean 4 bit x 256K
bit,
>> so 2 chips would make 256K RAM, or 8 for 1MB.

>But that may be a problem. The banks on the Apple Expansion card are for
256K
>bit x 1 bit. If he has 4 bit wide chips, could that not create the problem
that
>he has described?
>
>Roy