Re: DRAM chips for GS Juice Plus

["David Wilson" <mcs6502@gmail.com>]

Polymorph wrote:
> I am in the process of ordering some 1M x 1 DRAM's for my recently
> acquired G.S Juice Plus 4Mb RAM card, and just wanted confirmation from
> someone more knowledgeable than myself. I have found a supplier of
> KM41C1000BP7 chips which appear to be equivalent to M5M41000BP chips.
> They are 18 pin 1M x 1 DRAM chips, so am I correct in assuming that the
> pinouts will be the same. Are all 1M x 1 DRAMs equivalent?

Not all 1Mx1 DRAMs are the same - some are page mode, some nibble mode,
others are static column. My data book groups these under 411000,
411001 & 411002 respectively. They do all have the same pinout. Apple
IIgs RAM cards need chips that have CAS before RAS refresh timing.
Unfortunately my databook does not have those Samsung chips listed but
it does look like it might work -
http://home.arcor.de/kickstart/TKA/Tutorials/Memory/PNC.html#1MBit has
both the above parts listed as FPM.

How much are the chips you are looking at? Are they cheaper than
US$2.35ea?