shmuel+ibm-m...@patriot.net (Shmuel Metz , Seymour J.) writes: > That came later, along with the 3278 and 3279,
we complained to kingston that 3274/3278 was much worse for interactive computing that 3272/3277 ... kingston eventually came back and said that 3274/3278 target market was "data entry" (aka updated keypunch) not interactive computing (and nobody considered TSO in anyway related to interactive computing). we had hacked the 3277 to remove some of the worst human factors ... but part of the change to 3274/3278 was moving lots of the electronics out of the 3278 head back into the 3274 controller ... reducing manufacturing costs but eliminated some of the additional human factor hacks (like fixing trying to type just as the screen was being update ... normal processing would lock the keyboard and require reset to be hit). old post with some of the 3272/3277 comparisons with 3274/3278 http://www.garlic.com/~lynn/2001m.html#19 3270 protocol the 3274 controller also had lots of bugs requiring the it be reset/re-impl'ed ... however, we discovered a hack to force 3274 to re-impl w/o requiring manual operation ... just very quickly hit every subchannel address with HDV/CLRIO operation in tight loop. a couple years later there was corporate decisions to officially say that vm370/cms was the official corporate interactive computing platform (in part because nearly all of internal development was on vm370/cms ... even when it was for other platforms). What was really unusual was that it motivated the TSO product manager to contact me about rewriting MVS dispatch/scheduling for interactive workload (which wouldn't have helped a whole lot because there were major problems with several other areas of MVS) -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
