| 摘要 |
Refreshing of a portion of a DRAM device is bypassed when carrying out a refreshing operation on the DRAM device. By bypassing the refreshing of a portion of the DRAM device when carrying out a refreshing operation, the operational speed of the DRAM device and of systems that use the DRAM device can be increased, and/or the power consumption thereof can be decreased. More specifically, graphic memory apparatus include a DRAM device that is divided into a frame buffer zone that supplies pixel data for a display and at least one other zone, such as a z buffer and/or a texture storing zone. Refreshing of the frame buffer zone is bypassed when carrying out a refreshing operation on the DRAM device. In a preferred embodiment, indications of a starting DRAM address and an ending DRAM address for the frame buffer may be stored. A refreshing operation is performed only on those DRAM addresses that fall outside the starting address and the ending address.
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