Hi! I have some S-100 PIC/RTC boards left over from an S-100 project. They are $20 each plus $3 shipping in the US and $6 elsewhere for the PCB only. The boards are priority interrupt controller (i8259) and a MM58167 real time clock. There are diagnostics LEDs, configuration jumpers and switches, and battery backup. http://s100computers.com/My%20System%20Pages/PIC <http://s100computers.com/My%20System%20Pages/PIC&RTC%20Board/My%20PIC%20Boa rd.htm> &RTC%20Board/My%20PIC%20Board.htm These boards will support CP/M-80 but primarily intended for the S-100 x86 boards (CP/M-86 and FreeDOS) slated for next year. Please contact me if interested. Thanks and have a nice day! Andrew Lynch PS there are 11 types of S-100 boards completed (done or available) and another four more in development.