Computer bus expansion

Details Computer bus expansion Computer bus expansion

1996-12-18

1999-10-26

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710101, 710103, G06F 1300

Patent

active

059744898

ABSTRACT:
An arrangement is provided whereby an expansion card can be inserted in a multi-contact computer backplane connector and then gates provided between bus lines and respective connector contacts can be enabled. Hot insertability of the card and improved fault protection results. A plurality of gate signals for respective connectors can be provided so that a bus controller can selectively supply a gate signal for enabling transmission gates of only one connector for a given bus cycle, thereby providing dynamic cycle switching of the cards. The transmission gates can be provided in a backplane connector for a card. Preferably, a power supply signal is supplied to a switch gate connected between a power line and a power contact of the connector when a card has been inserted in a connector such that power is only supplied to the card only after insertion. A bus request signal can be enabled after a predetermined delay following the supply of power to the card.

REFERENCES:
patent: 5058004 (1991-10-01), Ravid
patent: 5134617 (1992-07-01), McRoy
patent: 5202965 (1993-04-01), Ahn et al.
patent: 5268592 (1993-12-01), Ballamy et al.
patent: 5274769 (1993-12-01), Ishida
patent: 5491804 (1996-02-01), Heath et al.
patent: 5586271 (1996-12-01), Parrett
patent: 5802328 (1998-09-01), Yoshimura
patent: 5805903 (1998-09-01), Elkhoury

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