SAL/SHL - Shift Arithmetic Left / Shift Logical Left

        Usage:  SAL     dest,count
                SHL     dest,count
        Modifies flags: CF OF PF SF ZF (AF undefined)

        +-+     +---------------+     +-+
        |C|<----|7 <---------- 0|<----|0|
        +-+     +---------------+     +-+

        Shifts the destination left by count bits with zeroes shifted
        in on right.  The Carry Flag contains the last bit shifted out.

                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        reg,1             2     2     3     3            2
        mem,1           15+EA   7     7     4           2-4  (W88=23+EA)
        reg,CL           8+4n  5+n    3     3            2
        mem,CL        20+EA+4n 8+n    7     4           2-4  (W88=28+EA+4n)
        reg,immed8        -    5+n    3     2            3
        mem,immed8        -    8+n    7     4           3-5


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