4 Dec
2018
4 Dec
'18
11:49 p.m.
On Tuesday, 4 December 2018 at 15:59:46 -0500, Paul Winalski wrote:
On 12/4/18, Paul Winalski
<paul.winalski(a)gmail.com> wrote:
Was this a start-from-scratch operation? 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.
When Tandem started using other architectures (MIPS) in the late 1980s
we discussed translating the whole thing to C. I was asked to write a
99% translator (maintaining comments and such), and failed.
I lost track of the system after that, but it seems surprising that
they would have started again from scratch.
Greg
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Over the years GEM was targeted to MIPS, PRISM, Alpha, and Itanium
machine architectures, and VMS, Unix, Linux, and Windows NT operating
systems. We were working on x86 when Compaq sold the Alpha
architecture and its engineering team (including GEM) to Intel.
I forgot one: Tandem NonStop OS on Alpha, which was under development
at Compaq at the time that Compaq decided to sell off the Alpha
technology to Intel.