On Tue, 4 Feb 2014 11:22:32 -0600, Ron Thomas <ron5...@gmail.com> wrote:

>Ok Thanks .so what would be o/p of this statement "TR    BIT,TR@TAB " here ? 
>

When I look at that code, I am left thinking "there has to be an easier way". I 
would have done a single CVB immediately after the PACK, and then split it up 
into the byte and bit displacements.

However to answer your specific question: The remainder, after dividing by 8, 
and which has been placed in BIT, is a number in the range 0 to 7. The TR 
converts 0 to X'80', 1 to X'40', 2 to X'20' etc, for use as the "mask" in the 
TM.

 

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