Bus for connecting extension cards to a data processing system a

Details Bus for connecting extension cards to a data processing system a Bus for connecting extension cards to a data processing system a

1993-02-11

1998-08-18

Harvey, Jack B.

Boots, shoes, and leggings

395800, 395828, 3642304, 3642362, 3642402, 364241, 364247, 3642591, G06F 1300

Patent

active

057970327

ABSTRACT:
A data processing system including a bus (ISA, EISA), in which address lines (SA) and data lines (SD) are connected in parallel to a series of slots for receiving, each, any one of a plurality of available extension cards. Control lines of the bus are connected in parallel to the slots, except at least one specific control line (AEN, SMEMR#) operable to enable a slot by rendering accessible, through the bus, the circuits of a card inserted in the slot. The data processing system further includes means (A, S, 30) programmable through the bus for transmitting the state of the specific control line to predetermined slots.

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Hamacher et al; Computer Organziation (2.sup.nd Ed), McGraw-Hill Inc, 1984 pp. 203-220.

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