datasheets for 82S21 - Signetics 32x2 SRAM?

Tony Duell wrote: It turns out it's write-while-read ram (no doubt you've caught up on your email by now and read the pdf which was posted). The strobe signal clocks the ram data into a latch. This is available for some time, even if you do a write. It's used in the MIT CADR lisp machine, for the m-memory, which is a high speed scratch pad used by the microcode. I wrote some programs to convert the original CAD files (in SUDS) into verilog and I've been (slowly) working on getting them to simulate. I want to boot one under simulation and eventually put one in a simple fpga (hah, by the time I'm 75 at this rate). I figure they'll make nice christmas gifts :-) I've got it fetching microcode from the prom. Most of the problems have been with 74 style 'parts' I have made - in some cases I had to guess because I have no data sheet but I'm slowly fixing that. Also iverilog and cver both seem to have some small issues but mostly work. I've used modelsim too but I perfer to run on linux. -brad