Raster operations unit with interleaving of read and write requests using PCI express
US8035647B1 · kind B1 · utility
3Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Aug 24, 2006 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Sep 23, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A raster operations (ROP) unit interleaves read and write requests for efficiently communicating with a frame buffer via a PCI Express (PCI E) link or other system bus that provides separate upstream and downstream data transfer paths. One example of a ROP unit processes pixels in groups, performing read modify writeback sequences for each group. The read requests associated with pixels in a second group are advantageously interleaved with the writeback requests for pixels in the first group prior to sending the requests on the system bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.