By Michael Larabel March 19, 2008
In the next step towards open-source 3D support for the R500 and R600 GPUs (Radeon X1000 and Radeon HD 2000/3000), AMD has just pushed its production microcode into the Mesa/DRM git tree. This is the microcode found in the fglrx driver and it covers the Radeon R100 to R600 product families. This microcode dump can be found in the Mesa/DRM git tree in shared-core/radeon_cp.c. This file is made up of the microcode (arrays made up of hex) for the R100, R200, R300, R420, RS600, RS690, R520, R600, RV610, and RV620. In providing this microcode AMD had looked at what is available in tcore and what's in use by their proprietary drivers. The microcode in their drivers was newer, so they decided to push that copy out into the open as their next step towards open-source 3D graphics. For a simple description, microcode is low-level instructions for the graphics processor. In a second commit today, Alex Deucher has switched the Radeon DRM to taking advantage of this new microcode for the existing Radeon products supported and adding in the code to load this production microcode for the latest ATI graphics products
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