Printed circuit card with self-configuring memory system for non-contentious allocation of reserved memory space among expansion cards
US5056060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0661
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.