Printed circuit card with self-configuring memory system for non

Details Printed circuit card with self-configuring memory system for non Printed circuit card with self-configuring memory system for non

1990-01-16

1991-10-08

Hecker, Stuart N.

Boots, shoes, and leggings

3649354, 36493544, 3649644, G06F 1314, G06F 1336

Patent

active

050560603

ABSTRACT:
A printed circuit board card adapted to fit into a slot and make electrical connections with cooperating terminals in the slot, the slot being disposed on the main circuit board of a personal computer system, the main circuit board including a CPU, memory, a 32-bit address bus with control signals associated therewith, and input/output circuity. The slot is coupled to the 32-bit address bus, being substantially a NUBUS bus, and the slot includes distinct identification line means which provide the slot with an identification number (distinct number) in the computer system. The card includes a decoder means which is coupled to the slot to receive the identification number; the decoder means has memory reservation means which causes 256 megabytes of memory space to be reserved for the card in the slot, such that, where the slot number is X, the 256 megabytes of reserved memory space begins at location $X000 0000 and ends at location $XFFF FFFF.

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NUBUS-Asimple 32 Bit Backplane Bus P 1196 Specif. Draft 2.0 (I.E.E.E.), Dec. 15, 1986, This document is a draft specification of the P 1196 working group of the microprocessors standards committee of IEEE, pp. (11-60).

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