Direct memory access control circuit and data processing system using said circuit
US4658349A · kind A · utility
49Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1984 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Aug 9, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A direct memory access control circuit equipped with a first register for storing the top address of a memory area, a second register for storing the bottom address of that memory area, a comparison circuit for comparing the current address used for memory access with the bottom address stored in the second register, and a control circuit for replacing the current address, which is to be subsequently used for memory access, with the top address stored in the first register when coincidence is detected by the comparison circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.