I just got stupidly lucky with a recent 5160 purchase. The machine contained a nice Tecmar muli-function + memory + clock card and an 8-bit VGA, card but the real gems are a CompatiCard IV, and the aforementioned Ramquest 8/16. The Ramquest will most likely go into a 5170 I'm working on (if it ends up working), but the question I have is which SIMMs will work with it? This card predates FPM and EDO memory, and I'm not sure what I have sitting around. I gather from the manual that I need parity, and SIMMs up to 4MB each. My dim recollection is that FPM should be backward compatible with hardware that doesn't support FPM, but I could be wrong. I'm not sure if I ever had EDO memory, so no idea about backward compatibility with it, although if the only difference is that the data is valid for a longer period, I could imagine it might be backward compatible as well. As always, any info is greatly appreciated.