Command Interface for Controlling Videodisc Players
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15
A multi-media presentation system comprises an intelligent display, a personal computer and one or two videodisc players (VDPs). A Control Program, which is a resident extension of a disk operating system (DOS), receives a common set of VDP control commands from an application program. The control program is designed to support these commands on VDPs of different manufacturers. High level VDP code receives the system application program interface (API) command buffer from DOS. The code then uses the API command to index into a high level interface chain where the API buffer is stored, together with a count of active API commands and a low level ID. Three VDP-dependent tables described below are used to translate the API command buffer to the low level command (LLC) buffer and the response buffer.