On 19/09/2015 14:03, Paul Koning wrote:
On Sep 19, 2015, at 5:25 AM, Rod Smallwood <rodsmallwoo...@btinternet.com>
wrote:
Is an overlay self modifyig code?
Yes (#2 in my list), but a controlled kind so it doesn't suffer from the
maintainability issues of explicitly modified instructions. But it does
require I-cache management, if the computer has an I-cache. Not all that
likely; a machine small enough that overlays are valuable isn't all that likely
to have an I-cache.
paul
Its a while back but I seem to remember in BASIC you replaced a set of
line numbers with another of the same range but different code.
Rod
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