HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                     CPU Characteristics / Determination

       8088,80188,V20  six byte prefetch queue, allows use of self
                       modifying code to determine length of prefetch

       8086,80186,V30  four byte prefetch queue, allows use of self
                       modifying code to determine length of prefetch

       8088,8086,80188,81086,v20,v30   Flag register bits 12 through
                       15 cannot be cleared

       8088,8086       will shift left or right using all 8 bits of
                       CL, if CL = 33, register is guaranteed to be
                       cleared

       80188,80186,80286,80386 will shift left or right using only
                       lower 5 bits of CL.  If CL = 32, the shift will
                       not occur

       80286,80386     earlier CPU's decremented SP before a PUSH SP, but
                       286+ pushes the value first then, decrements SP

       8088,8086       non-zero multiplication result clears zero flag

       V20,V30         non-zero multiplication result does not clear
                       zero flag, set ZF before multiply, and test after,
                       if it's still set, then it's a V20, V30

        80286          allows setting of bit 15 of the flags register

        80386          allows setting of bits 12 through 14 of flags register


       see BIBLIO reference to  PC Tech Journal, "Chips In Transition",
       April 1986

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