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Guy Harris (talk | contribs) →History: That link isn't useful - TSS (operating system) doesn't give details about UNIX/360, and the parenthetical note links to TSS/370, which redirects to TSS (operating system). |
→History: TSS Resident Supervisor, not hypervisor |
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IBM's own involvement in Unix can be dated to 1979, when it assisted Bell Labs in doing its own Unix port to the 370 (to be used as a [[Software build|build host]] for the [[5ESS switch]]'s software). In the process, IBM made modifications to the [[TSS/370]]
It took until 1984 for IBM to offer its own Unix on the S/370 platform, VM/IX, which was developed by [[Interactive Systems Corporation]] using Unix System III as its base. VM/IX (and the modified version of VM/370 it required) was not a General Availability product; it was only obtainable as a PRPQ. In 1985, VM/IX was replaced by IBM IX/370, which was a GA product intended by IBM to compete with Amdahl UTS.<ref>{{cite news |newspaper=Computerworld |date=February 18, 1985 |title=Users: new life for VM |page=11 |url=https://books.google.com/books?id=iwX8vVdMAckC&pg=PA11 |first=John |last=Gallant |access-date=February 3, 2015 |archive-date=May 17, 2015 |archive-url=https://web.archive.org/web/20150517120151/https://books.google.com/books?id=iwX8vVdMAckC&pg=PA11 |url-status=live }}</ref> IX/370 which was based on AT&T's Unix/360 6th Edition port (which only ran on [[TSS/370]] as a time-share application), was updated to Unix System 5 and modified by IBM to run as a VM/370 guest OS. The IX/370 operating system offered special facilities for interoperating with [[PC/IX]], Interactive/IBM's version of Unix for [[IBM PC compatible]] hardware, and was licensed at $10,000 per sixteen concurrent users.<ref>{{cite news |newspaper=Computerworld |date=February 18, 1985 |title=Software steals 3090's thunder: VM gets XA version; Unix fully supported |pages=1, 8 |url=https://books.google.com/books?id=iwX8vVdMAckC&pg=PA8 |first=John |last=Gallant |access-date=February 3, 2015 |archive-date=May 16, 2015 |archive-url=https://web.archive.org/web/20150516190722/https://books.google.com/books?id=iwX8vVdMAckC&pg=PA8 |url-status=live }}</ref>
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