Patent · US Expired

Microcomputer having an internal address mapper

US4649476A · kind A · utility

12Cited by
5References
3Claims
0Family size

Assignee

Inventor

Key dates

Filing dateOct 31, 1983
Grant dateMar 10, 1987
Priority date—
Expiry dateOct 31, 2003

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG06F12/0661
  • WIPO fieldComputer technology
  • WIPO sectorElectrical engineering

Abstract

In a microcomputer, an address mapper allows the user to selectively map a resource which is ordinarily addressable in one portion of the address range of the microcomputer into a correspondingly sized area elsewhere in the address range. Using a resource map address stored by the user in an addressable map register, the mapper continuously compares the map address to a corresponding number of bits on the microcomputer's address bus. When a match is detected, the mapper enables the address decoder of the mapped resource. The mapper can also map the map register. Since the mapper can map more than one resource, an interlock mechanism resolves access conflicts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.