Abstract: A personal computer is disclosed having a high speed microprocessor which executes in either a FAST mode or a SLOW mode application programs written for a slow speed microprocessor. The slow speed microprocessor contains a pre-fetch queue that is smaller than the pre-fetch queue of the high speed microprocessor. A logic means is included, responsive to a mode select signal for controlling the wait state of said high speed microprocessor when in the SLOW speed mode so that every other word accessed to said RAM memory requires two consecutive word accesses to the same memory address to obtain the contents of the addressed location thereby enabling said high speed microprocessor to execute applications programs in the SLOW mode, on the average, at substantially the same speed as the program normally runs on the slow speed microprocessor.

Abstract: A mechanism for adjusting the height and viewing angle of a flat panel display which is viewed in conjunction with a portable personal computer. The mechanism includes a pair of arms that swing the display panel betwen the lowered and raised position, cooperating with a cam wheel moveable in a cam track. In a raised position, the flat panel display may be adjusted in viewing angle. In a lowered position the flat panel display may be securely latched to the portable personal computer to protect the display from damage.