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   Re: [xml-dev] Jim Gray article on Next Generation Databases

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>> I recall Pick (though I wouldn't have made the connection); if I
remember correctly they had implementations on various pieces of
hardware, including IBM BM which was where I mainly worked at the
time. ..

Peter Hunsberger wrote:
>>> The real question was the possibility of  hardware/microcode assist ?

The GIM DBMS was developed using a machine-independent macro language designed
for data management operations. The first implementation was 32-bit IBM
mainframes, but there were ports to 36-bit Univac mainframes for NASA and 16-bit
PDP-11s for the CIA.

The port to Microdata hardware by Pick and Associates was the first time the
instruction set was implemented in firmware. The other ports had been done via
software -- creating a library containing macros that expanded into the native
instruction set of the target hardware.

Pick and Nelson conceived the DBMS, query language and machine-independent data
management operators in 1965, shortly before Richards developed the BCPL and
INTCODE (intermediate code) at Cambridge. That was about a  decade before Ken
Bowles and his students came up with the UCSD P-System.

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


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