G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 33/12 (2006.01) G06F 11/20 (2006.01) G06F 13/38 (2006.01) G07C 5/08 (2006.01) G11B 23/30 (2006.01) G11C 5/14 (2006.01) H02J 9/00 (2006.01)
Patent
CA 2069569
ABSTRACT OF THE DISCLOSURE The cartridge is provided with a memory for containing an information set, a status flag and a buffer for receiving an update to the information set, the update representing a change to only a part of the information set. The cartridge is also provided with a data and power connector for connecting the cartridge to a host computer, the connector being able to receive power from the host computer and exchange data when connected to the host computer, the cartridge also being provided with power supply switching means including a battery for selectively supplying power from the host computer when the connector is connected and from the battery when disconnected. The update is transferred to the buffer and subsequently from the buffer to the information set in response to the status flag, such that in the event of a disconnection, while the update is being received, the information set is not partially updated. The cartridge may also comprise a real time clock and a copy of the time when the real time clock was set by the host in the memory, so that the host may use the clock setting of the real time clock if the copy of the time when the real time clock was set is more recent than the time when a clock on the host was set, such that when the cartridge is used between a plurality of host computers, a more accurate and recent clock setting may be transferred between the plurality of host computers by the cartridge. The invention improves the reliability of data transferred between the host and the cartridge.
Glen Bruce
Prest Edward
Schweitzer Joseph
Glen Bruce
Prest Edward
Schweitzer Joseph
LandOfFree
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