Precharging an output peripheral for a direct memory access operation

A computer readable medium having computer instructions stored thereon that, when loaded into a computer, cause the computer to perform the steps of:

• transferring a first portion of an output data block targeted for a peripheral to an output buffer for the peripheral using read and write cycles on a bus coupled to the peripheral;
• translating a virtual address of the output data block into a physical address while the peripheral begins transferring the first portion from the output buffer and over an output path;
• and
• initiating a direct memory access operation that causes the peripheral to use the physical address to read a second portion of the output data block via the bus and transfer the second portion into the output buffer.

An apparatus for transferring data in a computer system, comprising:

• a first transfer device configured to transfer a first portion of an output data block targeted for a peripheral to an output buffer for the peripheral using read and write cycles on a bus coupled to the peripheral;
• a translator configured to translate a virtual address of the output data block into a physical address while the peripheral begins transferring the first portion from the output buffer and over an output path;
• and
• a direct memory access device configured to perform a direct memory access operation that causes the peripheral to use the physical address to read a second portion of the output data block via the bus and transfer the second portion into the output buffer.