Dynamically configurable interface cards with variable memory size
US5448710A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1991 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Feb 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0623
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Circuitry facilitates configuration of a memory within an interface card. The configuration includes configuring the memory size and the memory address space. A register stores configuration information from the computer system. Control lines are connected to the register and distribute information from the register to locations on the interface card. A comparator produces an output which indicates whether an address on address lines from the computer system is addressing memory locations within the memory. The comparator does this by comparing address bits on a first set of the address lines with control bits on a first set of the control lines. Logical circuitry, connected between a subset of the first set of the address lines and the comparator, is used to mask, from the comparator, address bits on the subset of the first set of address lines. Additional logical circuitry, connected to the second set of the control lines and connected between the subset of the first set of address lines and the memory is used for masking, from the memory, the address bits on the subset of the first set of address lines. When the address bits on the subset of the first set of address lines are ma…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.