15 Sep
2015
15 Sep
'15
2:03 a.m.
On Tue, Sep 15, 2015 at 2:34 AM, Dave G4UGM <dave.g4ugm at gmail.com> wrote:
Looks like FLEX for the 6809 was also 1976...
A neat trick since the 6809 wasn't introduced until 1978. I assume
what is really meant is FLEX for the 6800.
BUT I don't believe ISIS became an operating
system until 1976 when ISIS II added support for disks....
Are you sure ISIS (one) didn't have disk support? I thought that was
shipped with the first Intel MDS-DOS floppy systems for use on the
MDS-800 in 1975. A 1975 edition of the MDS-DOS Operator's Manual is
listed among other Intel manuals at:
http://www.intel-vintage.info/aboutme.htm
and the ISIS II manual has 1976 on Bitsavers has 1976
as the first Copyright.....
Which doesn't tell us anything about ISIS (one).
P.S. Often the search for "First" is
fruitless,
Definitely. I'm not necessarily looking for first, just early.
I found evidence of two operating systems for use on Intel's
development systems, sold by third parties along with their own floppy
disk systems, probably prior to Intel's MDS-DOS introduction. MDOS by
Millenium Information Systems Inc. is mentioned in the April 1975
Microcomputer Digest, and DOS-80 by Applied Data Communications in the
May 1975 issue. My vague recollection was that MDS-DOS was introduced
fairly late in 1975, but I don't have any definitive reference.