In a message dated 9/11/2005 1:53:28 P.M. Central Daylight Time,  
[EMAIL PROTECTED] writes:

>Moreover, even where the properties of an instructiion can be  guessed at 
>with high reliability, as is the case with more than half  of those in the 
>list, we shall not, as a practical matter, be able to  use them until John 
>Ehrman and his colleagues are able to provide  HLASM support for them.


If, for example, you knew precisely how the LA (Load Address) instruction  
worked but yet the Low Level Assembler of 1966 had not yet been enhanced to  
support LA, you could always write code like this:
*        LA      R3,WHATEVER
         DC     0H'0',X'4130',S(WHATEVER)
 
and your code would work.  This is somewhat difficult, and perhaps not  
interesting to most of us.  As you say, this might not be practical.   But it 
is 
feasible.
 
Bill Fairchild

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