On Mon, 20 Apr 2015 11:24:51 -0400, John Gilmore wrote: >The transition was from 24- to 31-bit addressing. Apart from this quibble, > Paul is right here. "Unused" fields should be initialized innocuously >and, usually, marked as reserved. (From time to time there is of course a >case for making user fields available in control blocks.) > My use of 32- rather tnan 31- was quite deliberate. Had bit 0 not been pervasively exploited as a flag, 32-bit addressing could have been accomplished easily.
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