It just occurred to me that we may have a nomenclature problem. I used the expression SRAM meaning Serial RAM. Old X86 mother boards do have SRAM in their cache all right, but the S means Static. That is fine to know if we need to build something that has some RAM in it and we don't want to have to deal with the refresh problem that one has with DRAM or Dynamic RAM, so what Sean said is correct but what I meant was the little 8-pin or so serial RAM chips that do not use more than one pin for data and possibly address information. AS I previously said, you pay for that in access time. It will take at least 8 clock cycles to get or write a byte and X clock cycles to address it depending on the width of the address bus. James Newton writes: >Huh? x86 cache ram is not serial AFAIK. What mfgr and make are you looking >at and what do you mean by serial?