[email protected] (Rick Fochtman) writes: > We had a similar problem on a 158 w/AP at Trailer Train, many moons ago.
remember that 158 & 3031 were the same engine. after future system was canceled (was going to replace 360/370 and was as different from 360/370 as 360/370 had been from earlier generations) some past posts http://www.garlic.com/~lynn/submain.html#futuresys there was then a made rush to get stuff back into the 370 product pipelines (since they had been allowed to go dry since future system was going to completely replace 370). it was going to take 7-8 yrs to do 370-xa & 3081 ... so there was a Q&D effort with 303x. 370/158 had integrated channel microcode (both 370 microcode and channel microcode shared the same engine). for 303x ... there was channel director ... which was 158 engine with just the integrated channel microcode and no 370 microcode 3031 was 158 engine with just the 370 microcode (and no channel microcode) coupled with a 2nd 158 engine with the channel microcode (and no 370 microcode). (a 3031 AP would have been three 158 engines, two running 370 microcode and one running channel microcode) 3032 was 168 repackaged to use channel director 3033 started out as 168 wiring diagram using 20% faster chip technology. the chips also had something like ten times the circuits ... but extra circuits would go unused. Sometime before 3033 ship, some of the logic was redone to better utilize chip higher circuit density ... boosting 3033 to 50% faster. -- 40+yrs 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
