Function:

The instructions mentioned above will limit the actual number of bits
shifted or rotated to the number of bits to be shifted AND 1f. The
remainder is actually shifted or rotated. A shift of 21h will actually be
a shift of 1.

This is also the case for the double shifts on 386+.

(186 and NEC difference supplied by Anthony Naggs)




SUB4S   Subtraction of packed BCD strings (NEC V20/30 only)
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