IBM Personal Computer Extended I/O Bus
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
A technique is described whereby two circuit cards are connected between the input/output (I/O) channel of the IBM Personal Computer (PC) and the industry standard Std Bus, so as to expand the I/O addressing capabilities of the IBM PC. The use of the IBM PC directly as a machine controller is limited by the number of expansion slots. The use of the industry standard Std Bus, although capable of handling I/O addressing, is limited since it does not have the flexibility of the IBM PC. The technique described herein combines the Std Bus I/O with the IBM PC processing capabilities to provide expansion of I/O addressing at full operating speed. Utilized are a PC Control (PCC) card and a Std Buffer (SB) card. A cable connects to the cards so that they may be located up to fifteen feet from each other.