Self modifying code, lambda calculus - Re: ENIAC programming
rodsmallwood52 at btinternet.com
Sat Sep 19 10:02:22 CDT 2015
On 19/09/2015 14:03, Paul Koning wrote:
>> On Sep 19, 2015, at 5:25 AM, Rod Smallwood <rodsmallwood52 at 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.
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.
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