Electronic circuit apparatus employing small disk drive with reconfigurable interface

An electronic circuit apparatus is provided for electronic circuits and devices, comprising a component disk drive, a disk controller, and a programmable interface for dynamically adapting the component drive to communicate over a predetermined bus architecture to an external application. The interface is programmed by the disk controller using one of a library of microcode sets stored on the component drive. Alternatively, a microprocessor independent of the disk controller programs the interface from microcode stored in solid state memory. In an alternative embodiment, the apparatus further comprises an application circuit and the programmable interface adapts the component drive for use by the circuit. In another embodiment, the apparatus comprises a subcircuit that communicates with an external application over a predetermined bus architecture, and the programmable interface adapts the subcircuit for such communication.