Computer able to determine whether or not a display is connected

Details Computer able to determine whether or not a display is connected Computer able to determine whether or not a display is connected

1995-05-19

1996-10-01

Kim, Ken S.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340661, 39518303, 395550, 395700, G06F 1130

Patent

active

055617646

ABSTRACT:
A computer comprising a main body, a connector having pins for connecting an external display to the main body, a register for storing data representing a first status or a second status in accordance with the voltage of specified ones of the pins of said connector means, and a display controller for controlling the external display. The computer further comprises a data-reading section for repeatedly reading the data stored in the register and counting the number of times the data representing the first status is read from said register means, and detecting section for determining that the external display is connected to the connector when the number of times the data representing the first status is read from the register reaches a prescribed value.

REFERENCES:
patent: 4575714 (1986-03-01), Rummel
patent: 5008846 (1991-04-01), Inoue
patent: 5159683 (1992-10-01), Lvovsky et al.
patent: 5247682 (1993-09-01), Kondou et al.

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