TELECOM Digest OnLine - Sorted: Re: More on Internet and Patent History

Re: More on Internet and Patent History

Rich Alderson (
11 Apr 2007 16:20:47 -0400 writes:

> Time sharing required a facility known as "Dynamic Address Translation".

Not on the IBM 704 where it was invented by John McCarthy (of LISP fame).

Timesharing does not require virtual memory. In a fixed memory space,
each process can be assigned an area, and the operating system can
move among those areas to provide round-robin or interrupt-driven
service to each process as needed. Address translation can be done
once at program load, and need not be in any way dynamic.

Rich Alderson                                       | /"\ ASCII ribbon     |                       | \ / campaign against |
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