System for transferring data between input/output devices having separate address spaces in accordance with initializing information in address packages
US5692218A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 25, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Apr 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4217
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system in a data processing system for transferring data from a first device to a second device within the data processing system. The data processing system includes a data bus, an address bus, a first address space associated with a memory and a second address space associated with an input/output device. Initially, an operation request package is transmitted to a second device from a first device, which informs the second device of the total amount of data to be transferred. A transfer signal is then transmitted in the data processing system. The transfer signal identifies the transfer as a transfer concerning an address in the second address space associated with the input/output device. A first address package is then transmitted to the second device from the first device on the address bus. The first address package includes a transfer identifier, a first identifier associated with the first device and a second identifier associated with the second device. A second address package, comprising a byte count and an address, are transmitted to the second device from the first device on the address bus. If data is to be transferred, the data is then transferred on the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.