System of accessing data in a graphics system and method thereof

A method of partitioning memory in a data processing system, the method comprising:

• identifying a first portion of a memory associated with a first channel as graphics memory;
• identifying a second portion of a memory associated with a second channel as graphics memory;
• partitioning each of the first and a second portion of memory into blocks;
• mapping each of the blocks to an X-Y location, wherein each block associated with a first channel is horizontally and vertically adjacent to blocks associated with the second channel.

A method of partitioning data, the method comprising:

• determining the memory present in a system;
• partitioning the memory between a first channel and a second channel;
• partitioning a first portion of the memory associated with the first channel as system memory;
• partitioning a second portion of the memory associated with the first channel as graphics memory;
• and
• partitioning at least a portion of the memory associated with the second channel as graphics memory.

A data processing system comprising:

• a system controller having:
• a first memory channel controller;
• a second memory channel controller;
• and
• a high-speed PCI bus arbiter;
• an input output (IO) controller coupled to the high-speed PCI bus arbiter, and having a low-speed PCI bus arbiter, wherein the low speed PCI arbiter supports a slower PCI bus rate than the high-speed PCI bus arbiter.

A system comprising:

• a first controller having an arbiter to arbitrate requests for a first bus of a predefined protocol type at a first data rate;
• and
• an second controller having:
• an arbiter to arbitrate requests for a second bus of the predefined protocol type at a second data rate, wherein the first data rate is at least 10 percent greater than the second data rate;
• and
• control circuitry to interface to the first bus.