Patent ID: 6154805
Filing Date: 2000-11-28
Classification: G06F

Abstract:
A realtime clock for interfacing with a personal computer through a first input/output port with a first addressing capability, comprising:a timekeeping circuit for generating timing information;a memory for storing said generated timing information, said memory having a first portion addressable by the personal computer in accordance with the first addressing capability of the first input/output port and the second portion non-addressable by the personal computer within the first addressing capability as it is beyond the first addressing capability of the first input/output port;first means for directly addressing said addressable portion of said memory external to the clock and retrieval of data therefrom by the personal computer within the first addressing capability of the first input/output port; andsecond means for directly addressing said non-addressable portion of said memory external to the clock and retrieving said timing information therefrom through said first input/output port.