5 Dec
2018
5 Dec
'18
3:29 p.m.
Paul beat me to it.. HP's SPL and Tandem's TAL were old news by then ...
In fact the HP's 3000's and HP 9000's stack architecture was model from
the
B5000, see below...
On Wed, Dec 5, 2018 at 12:35 AM Paul McJones <paul(a)mcjones.org> wrote:
Called Executive Systems Problem Oriented Language or ESPOL
<https://en.wikipedia.org/wiki/Executive_Systems_Problem_Oriented_Language>.
A later edition (66/67 time frame) of the reference manual for the 5500
can be found on bitsavers as: ESPOL B5500 Reference Manual 1967
<http://bitsavers.org/pdf/burroughs/B5000_5500_5700/1032638_B5500_ESPOL_RefManOct67.pdf>
ᐧ
On Dec 4,
2018, Greg 'groggy' Lehey <grog(a)lemis.com> wrote:
The original Tandem OS (called Guardian at the time) was written in
Tandem's
TAL (Transaction Application Language, amongst other productions),
a vague evolution of HP's SPL that looked more like Algol, starting in
about 1974. That is also the earliest I know of an operating system being
implemented entirely in a high level language.
Most likely the earliest operating system written in a high-level language
was the one for the Burroughs B5000 (early 1960s), written in a dialect of
Algol 60.