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Re: Jim Gray article on Next Generation Databases

microdata reality
> Other examples of database integrated into the OS
> Microdata Reality (1974) -- first minicomputer to do this
> IBM System 38 (1978) -- ancestor of the AS/400.
> If I remember correctly, Microdata used a microprogrammable instruction set
> the Reality. (Microcode implemented data management operators as part of the
> machine's instruction set.)

Peter Hunsberger wrote:
>> At the time I hadn't been able to come up with any other hardware based data
management, but then again, I was only peripherally aware of the
Microdata.  How is that you stumbled across it?

When Dick Pick and Don Nelson worked for TRW, they were the architects of a DBMS
named GIM that ran on IBM mainframes. After Pick left TRW, he formed a company
and struck a deal to port the DBMS to Microdata minicomputers. About the time
Pick and Associates were working on the Reality port, my task was to develop a
paging solution for GIM that would work with demand-paged virtual memory being
introduced by IBM.

About a year later, our lab took delivery of a rare computer called a Nanodata
QM-1. It was used for microprogramming R&D and designing new hardware. (One of
the early projects was a Concurrent Pascal machine.)

Microdata Reality was the pre-cursor to the Pick OS, another operating system
with a tightly-integrated DBMS.

======== Ken North ===========


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