>> OS/360 was a real storage only operating system. DAT was introduced with >> S/370. OS/390 could run on that hardware but not use DAT (and other >> new hardware facilites). > >DAT was introduced on 360/67 ... basically 360/65 with dynamic address >translation ... at least in its single processor version (although >360/67 offerred both 24-bit as well as 32-bit virtual addressing >modes). The 360/67 multiprocessor did offer some additional features >vis-a-vis 360/65 multiprocessor ... like all 360/67 processors could >directly address all physical channels (while 360/65 multiprocessor was >limited to addressing common real storage ... but didn't provide channel >multiprocessor connectivity).
I based my statement on the IBM brochure "MVS... a long and rich heritage" (GC28-1594); I haven't been in that business yet back then, so I admit, I do not know from own experience. The details in your statement make it look very trustworthy to me. Thanks. -- Peter Hunkeler Credit Suisse ---------------------------------------------------------------------- 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
