Homebrew 8080 Computer - kaputoarchive Minimum mode on the 8088 does not have any effect on the speed or capability of the microprocessor, it just changes the pinouts. In maximum mode the 8088 requres a third support chip to decode the extra signals and I didn't see any need to use it in a simple system like this. The IBM PC uses the 8088 in maxumum mode. Pictures: Schematics: Scott's 8088 Single Board Computer Project Page I recently acquired a 'vintage' 8088-based single board computer that came complete with a manual that includes the schematic. It is a design that uses all TTL gates except for the CPU itself. This would be a big improvement over the design presently described on this page, because 8084 clock chips are far more scarce than the 8088 processor itself.