10.22: addm/modular architecture:
. another term for modular is chip-oriented;
eg, to do a tree of math op's
a link to the whole math.type subexpression
is sent to the math chip,
which is implemented as a separately compiled c module
(one that was created from code safely generated from adda.code)
. the cpu does include math types needed for address arithmetic:
int's and mod's (unsigned ints);
all mult and div is done just by shifting .
. the modularity is entirely virtual:
the cpu controls all the memory,
and modularity consists of enforcing mutually exclusive access .
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