[email protected] (Jim Marshall) writes: > P.S. Getting the first of a new generation of IBM computer, the IBM 3032, > made us a showplace besides being in the Pentagon. But 6 months later IBM > shipped the first IBM 3033 to Singer up in New Jersey, we were obsolete and > never got the IBM 3032-AP/MP we hoped would come.
3032 was basically 168-3 repackaged to use 303x channel director instead of the 168 external channel boxes. in the wake of demise of future system, there was mad-rush to get stuff back into the 370 product pipelines. they took the 158 integrated channel microcode and split it into separate (dedicated 158 engine) box for the 303x channel controller. the 3031 then becomes a 158 with just the 370 microcode and a 2nd/separate 158 with just the integrated channel microcode (with same 158 engine no longer needed to be shared with executing both 370 microcode and integrated channel microcode, 3031 thruput becomes almost as fast as 4341). the 3032 then becomes a 168 with 303x channel director (158 with just the integrated channel microcode) instead of the 168 external channel boxes. the 3033 started out being the 168 logic mapped to chips that were 20percent faster. The chips also had a lot more circuits per chip ... initially that would be unused. In the 3033 product cycle there was some effort to redesign pieces of 168 logic to take advantage of the higher cicuit density ... and finally got the 3033 up to 50% faster than 168. there was eventually a 3033N sold that was crippled to be slower than 168/3032 but could be field upgraded to full 3033. -- 42yrs virtualization experience (since Jan68), online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
