1 Jul
2016
1 Jul
'16
11:39 p.m.
Clem Cole scripsit:
I would say even RT-11 is somewhere between executive and OS. It could
run foreground tasks (hence the name Real Time) if properly sysgenned,
and it had a decent kernel API that you didn't have to bypass.
UNIX could (and did) at the time -- by the time of
the AT (which was
when the PC's hockey stick curve took off) an 5.25" floppy had a capacity
of 1.44M. An RK05, the V6 and V7 standard, was 2.5 M which is a 40% loss
of space, but it was do-able.
The AT also had the 10 MB disk. Back when I had an AT, I ran Xenix
System III on it along with the MS C compiler, and was able to create
console-mode programs to run on everyone else's MS-DOS machines.
It's hard to remember/believe that Xenix was a Microsoft product before
DOS was.
DEC had
several (RT11, RSTS, RSX) and the line is perhaps a little fuzzy:
they were getting operating-ish.
Be careful here Ches. RT-11 and DOS-11 meet your (and my definitions). But RSTS and RSX were multi-users and ran (run)
protected mode, have/had
full networking stacks etc.
+1
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