[email protected] (Anne & Lynn Wheeler) writes: > also from bitsavers: > http://www.bitsavers.org/pdf/amdahl/datapro/70C-044-01_7709_Amdahl_470.pdf
re: http://www.garlic.com/~lynn/2018c.html#27 Software Delivery on Tape to be Discontinued other trivia ... from 470.pdf article The system that resulted from this shift in direction, the 470V/6, featured about twice the performance level of the IBM~370/168 at a similar price, while occupying only one-third of the space required by the IBM counterpart. ... snip ... this Future System reference talks about after FS implodes, there was mad rush to get stuff back into 370 product pipelines (Internal FS politics had been killing off 370 efforts and lack of 370 products during the FS period credited with starting to give clone makers market foothold) ... kicking off 3033 and 3081 in parallel. 3033 started off being 168-3 logic remapped to 20% faster chips. Eventually they got it up to 50% faster by doing some other optimization. 3081 was such a kludge that it required huge number of circuits and much more expensive to manufacture http://www.jfsowa.com/computer/memo125.htm The 370 emulator minus the FS microcode was eventually sold in 1980 as as the IBM 3081. The ratio of the amount of circuitry in the 3081 to its performance was significantly worse than other IBM systems of the time; its price/performance ratio wasn't quite so bad because IBM had to cut the price to be competitive. The major competition at the time was from Amdahl Systems -- a company founded by Gene Amdahl, who left IBM shortly before the FS project began, when his plans for the Advanced Computer System (ACS) were killed. The Amdahl machine was indeed superior to the 3081 in price/performance and spectaculary superior in terms of performance compared to the amount of circuitry.] ...snip ... this ACS/360 reference besides killing it off because they were afraid that it would advance the state-of-the-art too fast and they would loose control of the market ... at the end it goes into the ACS/360 features that show up more than 20yrs later in ES-9000. https://people.cs.clemson.edu/~mark/acs_end.html -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
