12 Dec
2008
12 Dec
'08
11:41 p.m.
Chuck Guzis wrote:
But, the data could only be operated on from the stack, right? So, if
you wanted to write a self-modifying program, wouldn't you need to have
two entries in the PRT, similarly to what you've suggested, and then
wouldn't you also need to push the elements of the array containing the
program data onto the stack, operate on them, then pop them off the
stack and back into the array space, thereby allowing the code to run?
Or am I missing something?
Peace... Sridhar
What was the
mechanism for transferring data between the stack and the
program space?
As far as I can remember, there was no prohibition on two entries in
the PRT describing the same physical address space--one as program,
the other as data. That would seem to kill the Harvard Architecture
idea, no?