You wrote...
> WP... workspace pointer. back when the 9900 was
new registers (memory)
> really ate up chip space and TI had an archetecture in the 990
minicomputer
> where register were in memory instead of in the
CPU. So the WP is a
pointer
that points to
a block of 16 locations in ram that are addressed in
instructions as R0 through R15.
Wow! What a cool architecture! That would be a very handy feature to
have in any processor.
Wouldn't that be an awfully handy feature for doing a context switch? It
would seem simply adjusting WP would perform the appropriate "change of
personality" to select the next user/process...
Jay