On Sun, 29 Oct 2006 09:28:37 -0500, Shmuel Metz (Seymour J.)
<[EMAIL PROTECTED]> wrote:

>In <[EMAIL PROTECTED]>, on 10/26/2006
>   at 09:45 PM, Tom Marchant <[EMAIL PROTECTED]> said:
>
>> ...  I could have sworn that
>>early definitions of RENT allowed a program to modify itself,
>
>So would the authors of Supervisor Services and Macroinstructions,
>sitting on my bookshelf, who wrote about the need for serialization if
>a reenterable program modifies itself. For that matter, ever wonder
>why IBM loads reenterable user programs into SP 251 instead of SP 252?

Thanks, Shmuel.  I was pretty sure that was documented somewhere.

-- 
Tom Marchant

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