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| From | Rich <rich@example.invalid> |
|---|---|
| Newsgroups | comp.misc |
| Subject | Forward Compatibility, Landmines |
| Date | 2014-09-22 01:38 +0000 |
| Organization | My Linux Box |
| Message-ID | <6BbLpXwAJNfoSitrPc6fedQL@dont-email.me> (permalink) |
http://www.os2museum.com/wp/?p=2626
Several years ago, after attempting to get a very old 286 version of
Xenix running in a VM, I concluded that it was probably incompatible
with any 386 and later processor. Recently I revisited this issue and
examined the problem in detail.
The operating system in question is IBM Personal Computer XENIX 1.0.
It's historically significant, not so much because it was the second OS
licensed by IBM from Microsoft, but rather because it was the first
protected-mode OS available for a PC (the IBM PC/AT to be exact). IBM PC
XENIX 1.0 was finalized around October 1984, just a few moths after the
IBM PC/AT ("Salmon") was introduced (August 1984). The PC/AT and PC
XENIX 1.0 were in fact announced on the same day.
...
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Forward Compatibility, Landmines Rich <rich@example.invalid> - 2014-09-22 01:38 +0000
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