bpendlet@esunix.UUCP (Bob Pendleton) (11/05/87)
in article <9398@pyramid.pyramid.com>, csg@pyramid.pyramid.com (Carl S. Gutekunst) says: > > In article <2525@mmintl.UUCP> franka@mmintl.UUCP (Frank Adams) writes: >>Instead, why not have four different execution threads being performed >>simultaneously? This eliminates the dependency checks and latency delays >>inherent in "vertical" pipelining. > > The early UNIVAC 1100-series processors did this. > The UNIVAC 1110 had four pipelines; the 1100/60 and 1100/80 have two. > <csg> Not to question your facts, Its been almost ten years since I read the 1100/60 and 1100/80 PSMs( Processor and Storage Manual ), and even longer for the 1110, but I must question your chronology. EARLY 1100s include such famous machines as the ERA 1101, the UNIVAC 1105, and 1107, machines built during the '50s and very early '60s. The 1101 was a vacuum tube and drum memory machine. The /60 and /80 were late 1970s machines. I was working for Sperry-Univac in '78 or '79 when they upgraded from an 1110 to a 1100/80. The 1100/90 is a '80s vintage machine. My first "personnal" computer was an old 1108, all mine after about 3 a.m. when the batch que would empty out. Bob P. -- Bob Pendleton @ Evans & Sutherland UUCP Address: {decvax,ucbvax,ihnp4,allegra}!decwrl!esunix!bpendlet Alternate: {ihnp4,seismo}!utah-cs!utah-gr!uplherc!esunix!bpendlet I am solely responsible for what I say.