упс... сорри, облажался
The 8086 has a microprogrammed sequencer, but has also many wired functionalities such as to optimise the size of the microcode. The vertical microinstructions are 21-bit wide. The microprogram ROM contains 504 microinstructions. The start address of a microinstruction microcode is delivered by a PLA.
кстати, тут вот
http://www.elis.rug.ac.be/escape/ живет симулятор микропроцессора. может, пригодится?..