DMA controller with mechanism for conditional action under control of status register, prespecified parameters, and condition field of channel command
US5717952A · kind A · utility
70Cited by
10References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 16, 1994 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Nov 16, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A DMA controller capable of conditional action under the control of a status register, prespecified parameters, and a condition field of the channel command, and a DMA controller which returns status information to command entry locations that are reserved for this purpose are disclosed. The prespecified parameters may be held in a register having a mask field and a value field, and a test for conditional action may be a masked comparison of the status register and the value field. The condition field determines how the test result is interpreted and allows suppressing or forcing the conditional action during a command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.