NVIDIA This file describes registers found in nvidia hardware as far as I've been able to determine from header files in the open-source "nv" 2d driver, the utah-glx nvidia driver, and the nvsdk that was publically available at one point. --Eric Anholt RIVA RIVA TNT RIVA TNT2 GeForce 256 GeForce2 GeForce3 NV04,NV05,NV10,NV15,NV20 0x00000001 0x00000002 0x00000004 0x00000006 0x00000003 0x00000001 0x00000003 CLIP_SIZE is the width/height of the clip area, with the maximum (disabled) being 0x7fff7fff 0x00000003 0x00000001 0x00000003 16 0x00000008 16 0x00000008 0x00000003 0x00000001 0x00000003 32 0x00000008 32 0x00000008 128 0x00000004 128 0x00000004 0x00000004 0x00000007 0x00000004 0x00000003 0x00000004 0x00000005 0x00000006 0x00000001 0x00000002 0x00000003 64 0x00000008 64 0x00000008 64 0x00000008 64 0x00000008 16 0x00000008 16 0x00000008 8 0x00000010 8 0x00000010 8 0x00000010 8 0x00000010 32 16 0x00000008 16 0x00000008 16 0x00000008 16 0x00000008 0x00000000 0x00100000 0x00200000 0x00300000 log2 of the texture minimum width/height. Textures must be square. Minimum of 4x4 (value = 0x2)? log2 of the texture maximim width/height. Textures must be square. Minimum of 4x4 (value = 0x2)? 0x00000000 0x00000001 0x00000002 Not clear on what this does, but in utah-glx, FOH_CENTER is used for the MAG_FILTER_LINEAR case. 0x00000000 0x00000010 0x00000020 0x00000030 0x00000000 0x00000040 0x00000080 0x000000c0 0x00000100 0x00000200 0x00000300 0x00000600 0x00001000 0x00002000 0x00003000 0x00010000 0x00020000 0x00030000 0x00040000 0x00050000 0x00060000 0x00070000 0x00080000 0x00000000 0x01000000 0x00000000 0x02000000 0x00000000 0x02000000 0x00000000 0x02000000 0x00000100 0x00000200 0x00000300 0x00000400 0x00000500 0x00000600 0x00000700 0x00000800 Unclear -- in the utah driver, this is set to 0, 0, then 1 in a triangle's vertices, and 0, 0, 1, 2 in a quad's vertices. Lines and points are rendered as quads. Unsigned 24-bit value of the fog density. The collision with LAST_VERT is confusing. Float value equal to 1/w 0x000000A1 This register always has this set, in the utah driver. 0x00000400 0x00000500 log2 of the texture width. log2 of the texture height. 0x01000000 0x03000000 0x10000000 0x30000000 0x10000000 0x20000000 0x01000000 0x02000000 0x03000000 0x04000000 0x05000000 0x06000000 0x00000120 It's set to this in utah-glx. 0x4 is added when texturing is disabled. 0x00000040 0x00000080 0x00100000 0x00200000 0x00300000 0x00400000 0x00500000 0x00600000 0x00700000 0x00800000 0x00900000 0x00a00000 0x00b00000 0x01000000 0x02000000 0x03000000 0x04000000 0x05000000 0x06000000 0x07000000 0x08000000 0x09000000 0x0a000000 The blend fields aren't necessarily correct. They were taken from utah, which just uses math, rather than a switch statement, to compute the field values. When disabled, it sets to SRCBLEND_ONE/ DSTBLEND_ZERO. 0x00010000 0x00020000 0x00030000 0x00040000 0x00050000 0x00060000 0x00070000 0x00080000 16 0x00000020 16 0x00000020 16 0x00000020 16 0x00000020 Float value equal to 1/w 16 0x00000020 16 0x00000020 16 0x00000020 16 0x00000020 This field triggers the drawing of a triangle using the specified vertices from the set of vertex registers that have been previously set up.