Chris Mason wrote:
Incidentally, I express that reservation about addressability in the simple terms of "There must be 240 bytes of code between the beginning of the CSECT
So why not just
        LA    3,TRTAB
        SL    3,=A(C'0')
        TR    .....,0(3)
?

If all bytes in operand 1 are guaranteed to be between F0 and FF, Then
there's no addressability problem !

After all, POP says :

"Access exceptions are recognized only for those
bytes in the second operand which are actually
required."

--Ivan

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