[Simh] A terminology question

[Leo Broukhis]

Dear colleagues,

There is an implementation detail in the BESM-6 architecture the name of
which we've struggled to translate adequately.  There is a feature
preventing execution of arbitrary data as instructions implemented using
two parity bits per word, for the upper and the lower half-word. The
overall parity must be odd, and one of the valid parity bit configurations
denotes an instruction, and the other denotes data. In the original
documentation this mechanism was called
https://translate.google.com/#ru/en/%D1%81%D0%B2%D0%B5%D1%80%D1%82%D0%BA%D0%B0
(the two forms were called literally "command convolution" and "number
convolution").

Unlike a tagged architecture, there isn't a fixed tag value to indicate
instructions or data.

Is there a standard term for this? "Convolution" sounds too mathematical.

Thanks,
Leo
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