GPU/Internal Registers

(this page is hugely WIP)

Overview

GPU internal registers are written to through GPU commands. They are used to control the GPU's behavior, that is to say tell it to draw stuff and how we want it drawn.

Types

There are three main types of registers :

• configuration registers, which directly map to various rendering properties (for example : GPUREG_FACECULLING_CONFIG)
• data transfer registers, which can be seen as FIFOs that let us send sequential chunks of data to the GPU, such as shader code or 1D samplers (for example : GPUREG_GSH_CODETRANSFER_DATA)
• action triggering registers, which tell the GPU to do something, like draw a primitive (for example : GPUREG_DRAWARRAYS)

Aliases

It is possible for multiple register (sequential) IDs to correspond to the same register. This is done to leverage the consecutive writing mode for GPU Commands, which makes it possible for a single command to write data to multiple sequential register IDs. For example, register IDs 02C1 through 02C8 all correspond to GPUREG_VSH_FLOATUNIFORM_DATA so that a consecutively writing command based at 02C0 will write its first parameter to GPUREG_VSH_FLOATUNIFORM_CONFIG and ever subsequent ones to GPUREG_VSH_FLOATUNIFORM_DATA

Register list

Miscellaneous registers (0x000-0x03F)

Register ID	Register name	Notes	Official Name
0000	GPUREG_0000
0001	GPUREG_0001
0002	GPUREG_0002
0003	GPUREG_0003
0004	GPUREG_0004
0005	GPUREG_0005
0006	GPUREG_0006
0007	GPUREG_0007
0008	GPUREG_0008
0009	GPUREG_0009
000A	GPUREG_000A
000B	GPUREG_000B
000C	GPUREG_000C
000D	GPUREG_000D
000E	GPUREG_000E
000F	GPUREG_000F
0010	GPUREG_FINALIZE
0011	GPUREG_0011
0012	GPUREG_0012
0013	GPUREG_0013
0014	GPUREG_0014
0015	GPUREG_0015
0016	GPUREG_0016
0017	GPUREG_0017
0018	GPUREG_0018
0019	GPUREG_0019
001A	GPUREG_001A
001B	GPUREG_001B
001C	GPUREG_001C
001D	GPUREG_001D
001E	GPUREG_001E
001F	GPUREG_001F
0020	GPUREG_0020
0021	GPUREG_0021
0022	GPUREG_0022
0023	GPUREG_0023
0024	GPUREG_0024
0025	GPUREG_0025
0026	GPUREG_0026
0027	GPUREG_0027
0028	GPUREG_0028
0029	GPUREG_0029
002A	GPUREG_002A
002B	GPUREG_002B
002C	GPUREG_002C
002D	GPUREG_002D
002E	GPUREG_002E
002F	GPUREG_002F
0030	GPUREG_0030
0031	GPUREG_0031
0032	GPUREG_0032
0033	GPUREG_0033
0034	GPUREG_0034
0035	GPUREG_0035
0036	GPUREG_0036
0037	GPUREG_0037
0038	GPUREG_0038
0039	GPUREG_0039
003A	GPUREG_003A
003B	GPUREG_003B
003C	GPUREG_003C
003D	GPUREG_003D
003E	GPUREG_003E
003F	GPUREG_003F

Rasterizer registers (0x040-0x07F)

Register ID	Register name	Notes	Official Name
0040	GPUREG_FACECULLING_CONFIG		PICA_REG_CULL_FACE
0041	GPUREG_VIEWPORT_WIDTH		PICA_REG_VIEWPORT_WIDTH1
0042	GPUREG_VIEWPORT_INVW		PICA_REG_VIEWPORT_WIDTH2
0043	GPUREG_VIEWPORT_HEIGHT		PICA_REG_VIEWPORT_HEIGHT1
0044	GPUREG_VIEWPORT_INVH		PICA_REG_VIEWPORT_HEIGHT2
0045	GPUREG_0045
0046	GPUREG_0046
0047	GPUREG_0047	?	PICA_REG_FRAG_OP_CLIP
0048	GPUREG_0048	?	PICA_REG_FRAG_OP_CLIP_DATA1
0049	GPUREG_0049	?	PICA_REG_FRAG_OP_CLIP_DATA2
004A	GPUREG_004A	?	PICA_REG_FRAG_OP_CLIP_DATA3
004B	GPUREG_004B	?	PICA_REG_FRAG_OP_CLIP_DATA4
004C	GPUREG_004C
004D	GPUREG_DEPTHMAP_SCALE	As f24	PICA_REG_FRAG_OP_WSCALE_DATA1
004E	GPUREG_DEPTHMAP_OFFSET	As f24	PICA_REG_FRAG_OP_WSCALE_DATA2
004F	GPUREG_SH_OUTMAP_TOTAL		PICA_REG_GS_OUT_REG_NUM0 / PICA_REG_VS_OUT_REG_NUM0
0050	GPUREG_SH_OUTMAP_O0		PICA_REG_GS_OUT_ATTR0 / PICA_REG_VS_OUT_ATTR0
0051	GPUREG_SH_OUTMAP_O1		PICA_REG_GS_OUT_ATTR1 / PICA_REG_VS_OUT_ATTR1
0052	GPUREG_SH_OUTMAP_O2		PICA_REG_GS_OUT_ATTR2 / PICA_REG_VS_OUT_ATTR2
0053	GPUREG_SH_OUTMAP_O3		PICA_REG_GS_OUT_ATTR3 / PICA_REG_VS_OUT_ATTR3
0054	GPUREG_SH_OUTMAP_O4		PICA_REG_GS_OUT_ATTR4 / PICA_REG_VS_OUT_ATTR4
0055	GPUREG_SH_OUTMAP_O5		PICA_REG_GS_OUT_ATTR5 / PICA_REG_VS_OUT_ATTR5
0056	GPUREG_SH_OUTMAP_O6		PICA_REG_GS_OUT_ATTR6 / PICA_REG_VS_OUT_ATTR6
0057	GPUREG_0057
0058	GPUREG_0058
0059	GPUREG_0059
005A	GPUREG_005A
005B	GPUREG_005B
005C	GPUREG_005C
005D	GPUREG_005D
005E	GPUREG_005E
005F	GPUREG_005F
0060	GPUREG_0060
0061	GPUREG_0061	?	PICA_REG_EARLY_DEPTH_FUNC
0062	GPUREG_0062	?	PICA_REG_EARLY_DEPTH_TEST1
0063	GPUREG_0063
0064	GPUREG_0064	?	PICA_REG_GS_OUT_ATTR_MODE / PICA_REG_VS_OUT_ATTR_MODE
0065	GPUREG_SCISSORTEST_MODE		PICA_REG_SCISSOR
0066	GPUREG_SCISSORTEST_POS		PICA_REG_SCISSOR_XY
0067	GPUREG_SCISSORTEST_DIM		PICA_REG_SCISSOR_SIZE
0068	GPUREG_VIEWPORT_XY		PICA_REG_VIEWPORT_XY
0069	GPUREG_0069
006A	GPUREG_006A		PICA_REG_EARLY_DEPTH_DATA
006B	GPUREG_006B
006C	GPUREG_006C
006D	GPUREG_006D	?	PICA_REG_FRAG_OP_WSCALE
006E	GPUREG_FRAMEBUFFER_DIM2	?	PICA_REG_RENDER_BUF_RESOLUTION1
006F	GPUREG_006F	?	PICA_REG_GS_OUT_ATTR_CLK / PICA_REG_VS_OUT_ATTR_CLK
0070	GPUREG_0070
0071	GPUREG_0071
0072	GPUREG_0072
0073	GPUREG_0073
0074	GPUREG_0074
0075	GPUREG_0075
0076	GPUREG_0076
0077	GPUREG_0077
0078	GPUREG_0078
0079	GPUREG_0079
007A	GPUREG_007A
007B	GPUREG_007B
007C	GPUREG_007C
007D	GPUREG_007D
007E	GPUREG_007E
007F	GPUREG_007F

Texturing registers (0x080-0x0FF)

Register ID	Register name	Notes	Official Name
0080	GPUREG_TEXUNIT_ENABLE		PICA_REG_TEXTURE_FUNC
0081	GPUREG_TEXUNIT0_BORDER_COLOR		PICA_REG_TEXTURE0_BORDER_COLOR
0082	GPUREG_TEXUNIT0_DIM		PICA_REG_TEXTURE0_SIZE
0083	GPUREG_TEXUNIT0_PARAM		PICA_REG_TEXTURE0_WRAP_FILTER
0084	GPUREG_0084	?	PICA_REG_TEXTURE0_LOD
0085	GPUREG_TEXUNIT0_LOC		PICA_REG_TEXTURE0_ADDR1
0086	GPUREG_0086		PICA_REG_TEXTURE0_ADDR2
0087	GPUREG_0087		PICA_REG_TEXTURE0_ADDR3
0088	GPUREG_0088		PICA_REG_TEXTURE0_ADDR4
0089	GPUREG_0089		PICA_REG_TEXTURE0_ADDR5
008A	GPUREG_008A		PICA_REG_TEXTURE0_ADDR6
008B	GPUREG_008B	?	PICA_REG_TEXTURE0_SHADOW
008C	GPUREG_008C
008D	GPUREG_008D
008E	GPUREG_TEXUNIT0_TYPE	?	PICA_REG_TEXTURE0_FORMAT
008F	GPUREG_LIGHTING_ENABLE0	?	PICA_REG_FRAG_LIGHT_EN0
0090	GPUREG_0090
0091	GPUREG_TEXUNIT1_BORDER_COLOR		PICA_REG_TEXTURE1_BORDER_COLOR
0092	GPUREG_TEXUNIT1_DIM		PICA_REG_TEXTURE1_SIZE
0093	GPUREG_TEXUNIT1_PARAM		PICA_REG_TEXTURE1_WRAP_FILTER
0094	GPUREG_0094	?	PICA_REG_TEXTURE1_LOD
0095	GPUREG_TEXUNIT1_LOC		PICA_REG_TEXTURE1_ADDR
0096	GPUREG_TEXUNIT1_TYPE		PICA_REG_TEXTURE1_FORMAT
0097	GPUREG_0097
0098	GPUREG_0098
0099	GPUREG_TEXUNIT2_BORDER_COLOR		PICA_REG_TEXTURE2_BORDER_COLOR
009A	GPUREG_TEXUNIT2_DIM		PICA_REG_TEXTURE2_SIZE
009B	GPUREG_TEXUNIT2_PARAM		PICA_REG_TEXTURE2_WRAP_FILTER
009C	GPUREG_009C	?	PICA_REG_TEXTURE2_LOD
009D	GPUREG_TEXUNIT2_LOC		PICA_REG_TEXTURE2_ADDR
009E	GPUREG_TEXUNIT2_TYPE		PICA_REG_TEXTURE2_FORMAT
009F	GPUREG_009F
00A0	GPUREG_00A0
00A1	GPUREG_00A1
00A2	GPUREG_00A2
00A3	GPUREG_00A3
00A4	GPUREG_00A4
00A5	GPUREG_00A5
00A6	GPUREG_00A6
00A7	GPUREG_00A7
00A8	GPUREG_00A8	?	PICA_REG_TEXTURE3_PROTEX0
00A9	GPUREG_00A9	?	PICA_REG_TEXTURE3_PROTEX1
00AA	GPUREG_00AA	?	PICA_REG_TEXTURE3_PROTEX2
00AB	GPUREG_00AB	?	PICA_REG_TEXTURE3_PROTEX3
00AC	GPUREG_00AC	?	PICA_REG_TEXTURE3_PROTEX4
00AD	GPUREG_00AD	?	PICA_REG_TEXTURE3_PROTEX5
00AE	GPUREG_00AE
00AF	GPUREG_00AF	?	PICA_REG_PROTEX_LUT
00B0	GPUREG_00B0	?	PICA_REG_PROTEX_LUT_DATA0
00B1	GPUREG_00B1	?	PICA_REG_PROTEX_LUT_DATA1
00B2	GPUREG_00B2	?	PICA_REG_PROTEX_LUT_DATA2
00B3	GPUREG_00B3	?	PICA_REG_PROTEX_LUT_DATA3
00B4	GPUREG_00B4	?	PICA_REG_PROTEX_LUT_DATA4
00B5	GPUREG_00B5	?	PICA_REG_PROTEX_LUT_DATA5
00B6	GPUREG_00B6	?	PICA_REG_PROTEX_LUT_DATA6
00B7	GPUREG_00B7	?	PICA_REG_PROTEX_LUT_DATA7
00B8	GPUREG_00B8
00B9	GPUREG_00B9
00BA	GPUREG_00BA
00BB	GPUREG_00BB
00BC	GPUREG_00BC
00BD	GPUREG_00BD
00BE	GPUREG_00BE
00BF	GPUREG_00BF
00C0	GPUREG_TEXENV0_SOURCE		PICA_REG_TEX_ENV_0
00C1	GPUREG_TEXENV0_OPERAND		PICA_REG_TEX_ENV_0_OPERAND
00C2	GPUREG_TEXENV0_COMBINER		PICA_REG_TEX_ENV_0_COMBINE
00C3	GPUREG_TEXENV0_COLOR		PICA_REG_TEX_ENV_0_COLOR
00C4	GPUREG_TEXENV0_SCALE		PICA_REG_TEX_ENV_0_SCALE
00C5	GPUREG_00C5
00C6	GPUREG_00C6
00C7	GPUREG_00C7
00C8	GPUREG_TEXENV1_SOURCE		PICA_REG_TEX_ENV_1
00C9	GPUREG_TEXENV1_OPERAND		PICA_REG_TEX_ENV_1_OPERAND
00CA	GPUREG_TEXENV1_COMBINER		PICA_REG_TEX_ENV_1_COMBINE
00CB	GPUREG_TEXENV1_COLOR		PICA_REG_TEX_ENV_1_COLOR
00CC	GPUREG_TEXENV1_SCALE		PICA_REG_TEX_ENV_1_SCALE
00CD	GPUREG_00CD
00CE	GPUREG_00CE
00CF	GPUREG_00CF
00D0	GPUREG_TEXENV2_SOURCE		PICA_REG_TEX_ENV_2
00D1	GPUREG_TEXENV2_OPERAND		PICA_REG_TEX_ENV_2_OPERAND
00D2	GPUREG_TEXENV2_COMBINER		PICA_REG_TEX_ENV_2_COMBINE
00D3	GPUREG_TEXENV2_COLOR		PICA_REG_TEX_ENV_2_COLOR
00D4	GPUREG_TEXENV2_SCALE		PICA_REG_TEX_ENV_2_SCALE
00D5	GPUREG_00D5
00D6	GPUREG_00D6
00D7	GPUREG_00D7
00D8	GPUREG_TEXENV3_SOURCE		PICA_REG_TEX_ENV_3
00D9	GPUREG_TEXENV3_OPERAND		PICA_REG_TEX_ENV_3_OPERAND
00DA	GPUREG_TEXENV3_COMBINER		PICA_REG_TEX_ENV_3_COMBINE
00DB	GPUREG_TEXENV3_COLOR		PICA_REG_TEX_ENV_3_COLOR
00DC	GPUREG_TEXENV3_SCALE		PICA_REG_TEX_ENV_3_SCALE
00DD	GPUREG_00DD
00DE	GPUREG_00DE
00DF	GPUREG_00DF
00E0	GPUREG_TEXENV_UPDATE_BUFFER	?	PICA_REG_GAS_FOG_MODE / PICA_REG_TEX_ENV_BUF_INPUT
00E1	GPUREG_00E1	?	PICA_REG_FOG_COLOR
00E2	GPUREG_00E2
00E3	GPUREG_00E3
00E4	GPUREG_00E4	?	PICA_REG_GAS_ATTENUATION
00E5	GPUREG_00E5	?	PICA_REG_GAS_ACCMAX
00E6	GPUREG_00E6	?	PICA_REG_FOG_LUT_INDEX
00E7	GPUREG_00E7
00E8	GPUREG_00E8	?	PICA_REG_FOG_LUT_DATA0
00E9	GPUREG_00E9	?	PICA_REG_FOG_LUT_DATA1
00EA	GPUREG_00EA	?	PICA_REG_FOG_LUT_DATA2
00EB	GPUREG_00EB	?	PICA_REG_FOG_LUT_DATA3
00EC	GPUREG_00EC	?	PICA_REG_FOG_LUT_DATA4
00ED	GPUREG_00ED	?	PICA_REG_FOG_LUT_DATA5
00EE	GPUREG_00EE	?	PICA_REG_FOG_LUT_DATA6
00EF	GPUREG_00EF	?	PICA_REG_FOG_LUT_DATA7
00F0	GPUREG_TEXENV4_SOURCE		PICA_REG_TEX_ENV_4
00F1	GPUREG_TEXENV4_OPERAND		PICA_REG_TEX_ENV_4_OPERAND
00F2	GPUREG_TEXENV4_COMBINER		PICA_REG_TEX_ENV_4_COMBINE
00F3	GPUREG_TEXENV4_COLOR		PICA_REG_TEX_ENV_4_COLOR
00F4	GPUREG_TEXENV4_SCALE		PICA_REG_TEX_ENV_4_SCALE
00F5	GPUREG_00F5
00F6	GPUREG_00F6
00F7	GPUREG_00F7
00F8	GPUREG_TEXENV5_SOURCE		PICA_REG_TEX_ENV_5
00F9	GPUREG_TEXENV5_OPERAND		PICA_REG_TEX_ENV_5_OPERAND
00FA	GPUREG_TEXENV5_COMBINER		PICA_REG_TEX_ENV_5_COMBINE
00FB	GPUREG_TEXENV5_COLOR		PICA_REG_TEX_ENV_5_COLOR
00FC	GPUREG_TEXENV5_SCALE		PICA_REG_TEX_ENV_5_SCALE
00FD	GPUREG_TEXENV_BUFFER_COLOR	?	PICA_REG_TEX_ENV_BUF_COLOR
00FE	GPUREG_00FE
00FF	GPUREG_00FF

Framebuffer registers (0x100-0x13F)

Register ID	Register name	Notes	Official Name
0100	GPUREG_BLEND_ENABLE		PICA_REG_COLOR_OPERATION
0101	GPUREG_BLEND_CONFIG		PICA_REG_BLEND_FUNC
0102	GPUREG_LOGICOP_CONFIG		PICA_REG_LOGIC_OP
0103	GPUREG_BLEND_COLOR		PICA_REG_BLEND_COLOR
0104	GPUREG_ALPHATEST_CONFIG		PICA_REG_FRAG_OP_ALPHA_TEST
0105	GPUREG_STENCIL_TEST		PICA_REG_STENCIL_TEST
0106	GPUREG_STENCIL_ACTION		PICA_REG_STENCIL_OP
0107	GPUREG_DEPTHTEST_CONFIG		PICA_REG_DEPTH_COLOR_MASK
0108	GPUREG_0108
0109	GPUREG_0109
010A	GPUREG_010A
010B	GPUREG_010B
010C	GPUREG_010C
010D	GPUREG_010D
010E	GPUREG_010E
010F	GPUREG_010F
0110	GPUREG_FRAMEBUFFER_INVALIDATE		PICA_REG_COLOR_BUFFER_CLEAR0
0111	GPUREG_FRAMEBUFFER_FLUSH		PICA_REG_COLOR_BUFFER_CLEAR1
0112	GPUREG_COLORBUFFER_READ		PICA_REG_COLOR_BUFFER_READ
0113	GPUREG_COLORBUFFER_WRITE		PICA_REG_COLOR_BUFFER_WRITE
0114	GPUREG_DEPTHBUFFER_READ		PICA_REG_DEPTH_STENCIL_READ
0115	GPUREG_DEPTHBUFFER_WRITE		PICA_REG_DEPTH_STENCIL_WRITE
0116	GPUREG_DEPTHBUFFER_FORMAT		PICA_REG_RENDER_BUF_DEPTH_MODE
0117	GPUREG_COLORBUFFER_FORMAT		PICA_REG_RENDER_BUF_COLOR_MODE
0118	GPUREG_0118	?	PICA_REG_EARLY_DEPTH_TEST2
0119	GPUREG_0119
011A	GPUREG_011A
011B	GPUREG_FRAMEBUFFER_BLOCK32		PICA_REG_RENDER_BLOCK_FORMAT
011C	GPUREG_DEPTHBUFFER_LOC		PICA_REG_RENDER_BUF_DEPTH_ADDR
011D	GPUREG_COLORBUFFER_LOC		PICA_REG_RENDER_BUF_COLOR_ADDR
011E	GPUREG_FRAMEBUFFER_DIM		PICA_REG_RENDER_BUF_RESOLUTION0
011F	GPUREG_011F
0120	GPUREG_0120	?	PICA_REG_GAS_LIGHT_XY
0121	GPUREG_0121	?	PICA_REG_GAS_LIGHT_Z
0122	GPUREG_0122	?	PICA_REG_GAS_LIGHT_Z_COLOR
0123	GPUREG_0123	?	PICA_REG_GAS_LUT_INDEX
0124	GPUREG_0124	?	PICA_REG_GAS_LUT_DATA
0125	GPUREG_0125
0126	GPUREG_0126	?	PICA_REG_GAS_DELTAZ_DEPTH
0127	GPUREG_0127
0128	GPUREG_0128
0129	GPUREG_0129
012A	GPUREG_012A
012B	GPUREG_012B
012C	GPUREG_012C
012D	GPUREG_012D
012E	GPUREG_012E
012F	GPUREG_012F
0130	GPUREG_0130	?	PICA_REG_FRAG_OP_SHADOW
0131	GPUREG_0131
0132	GPUREG_0132
0133	GPUREG_0133
0134	GPUREG_0134
0135	GPUREG_0135
0136	GPUREG_0136
0137	GPUREG_0137
0138	GPUREG_0138
0139	GPUREG_0139
013A	GPUREG_013A
013B	GPUREG_013B
013C	GPUREG_013C
013D	GPUREG_013D
013E	GPUREG_013E
013F	GPUREG_013F

Fragment lighting registers (0x140-0x1FF)

Register ID	Register name	Notes	Official Name
0140	GPUREG_LIGHT0_SPECULAR0	?	PICA_REG_FRAG_LIGHT0_SPECULAR0 / PICA_REG_FRAG_LIGHT_START
0141	GPUREG_LIGHT0_SPECULAR1	?	PICA_REG_FRAG_LIGHT0_SPECULAR1
0142	GPUREG_LIGHT0_DIFFUSE	?	PICA_REG_FRAG_LIGHT0_DIFFUSE
0143	GPUREG_LIGHT0_AMBIENT	?	PICA_REG_FRAG_LIGHT0_AMBIENT
0144	GPUREG_LIGHT0_XY	?	PICA_REG_FRAG_LIGHT0_POSITION_XY
0145	GPUREG_LIGHT0_Z	?	PICA_REG_FRAG_LIGHT0_POSITION_Z
0146	GPUREG_LIGHT0_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT0_SPOT_XY
0147	GPUREG_LIGHT0_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT0_SPOT_Z
0148	GPUREG_0148
0149	GPUREG_LIGHT0_CONFIG		PICA_REG_FRAG_LIGHT0_TYPE
014A	GPUREG_LIGHT0_ATTENUATION_BIAS	?	PICA_REG_FRAG_LIGHT0_DIST_ATTN_BIAS
014B	GPUREG_LIGHT0_ATTENUATION_SCALE	?	PICA_REG_FRAG_LIGHT0_DIST_ATTN_SCALE
014C	GPUREG_014C
014D	GPUREG_014D
014E	GPUREG_014E
014F	GPUREG_014F
0150	GPUREG_LIGHT1_SPECULAR0	?	PICA_REG_FRAG_LIGHT1_SPECULAR0
0151	GPUREG_LIGHT1_SPECULAR1	?	PICA_REG_FRAG_LIGHT1_SPECULAR1
0152	GPUREG_LIGHT1_DIFFUSE	?	PICA_REG_FRAG_LIGHT1_DIFFUSE
0153	GPUREG_LIGHT1_AMBIENT	?	PICA_REG_FRAG_LIGHT1_AMBIENT
0154	GPUREG_LIGHT1_XY	?	PICA_REG_FRAG_LIGHT1_POSITION_XY
0155	GPUREG_LIGHT1_Z	?	PICA_REG_FRAG_LIGHT1_POSITION_Z
0156	GPUREG_LIGHT1_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT1_SPOT_XY
0157	GPUREG_LIGHT1_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT1_SPOT_Z
0158	GPUREG_0158
0159	GPUREG_LIGHT1_CONFIG	?	PICA_REG_FRAG_LIGHT1_TYPE
015A	GPUREG_LIGHT1_ATTENUATION_BIAS	?	PICA_REG_FRAG_LIGHT1_DIST_ATTN_BIAS
015B	GPUREG_LIGHT1_ATTENUATION_SCALE	?	PICA_REG_FRAG_LIGHT1_DIST_ATTN_SCALE
015C	GPUREG_015C
015D	GPUREG_015D
015E	GPUREG_015E
015F	GPUREG_015F
0160	GPUREG_LIGHT2_SPECULAR0	?	PICA_REG_FRAG_LIGHT2_SPECULAR0
0161	GPUREG_LIGHT2_SPECULAR1	?	PICA_REG_FRAG_LIGHT2_SPECULAR1
0162	GPUREG_LIGHT2_DIFFUSE	?	PICA_REG_FRAG_LIGHT2_DIFFUSE
0163	GPUREG_LIGHT2_AMBIENT	?	PICA_REG_FRAG_LIGHT2_AMBIENT
0164	GPUREG_LIGHT2_XY	?	PICA_REG_FRAG_LIGHT2_POSITION_XY
0165	GPUREG_LIGHT2_Z	?	PICA_REG_FRAG_LIGHT2_POSITION_Z
0166	GPUREG_LIGHT2_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT2_SPOT_XY
0167	GPUREG_LIGHT2_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT2_SPOT_Z
0168	GPUREG_0168
0169	GPUREG_LIGHT2_CONFIG	?	PICA_REG_FRAG_LIGHT2_TYPE
016A	GPUREG_LIGHT2_ATTENUATION_BIAS	?	PICA_REG_FRAG_LIGHT2_DIST_ATTN_BIAS
016B	GPUREG_LIGHT2_ATTENUATION_SCALE	?	PICA_REG_FRAG_LIGHT2_DIST_ATTN_SCALE
016C	GPUREG_016C
016D	GPUREG_016D
016E	GPUREG_016E
016F	GPUREG_016F
0170	GPUREG_LIGHT3_SPECULAR0	?	PICA_REG_FRAG_LIGHT3_SPECULAR0
0171	GPUREG_LIGHT3_SPECULAR1	?	PICA_REG_FRAG_LIGHT3_SPECULAR1
0172	GPUREG_LIGHT3_DIFFUSE	?	PICA_REG_FRAG_LIGHT3_DIFFUSE
0173	GPUREG_LIGHT3_AMBIENT	?	PICA_REG_FRAG_LIGHT3_AMBIENT
0174	GPUREG_LIGHT3_XY	?	PICA_REG_FRAG_LIGHT3_POSITION_XY
0175	GPUREG_LIGHT3_Z	?	PICA_REG_FRAG_LIGHT3_POSITION_Z
0176	GPUREG_LIGHT3_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT3_SPOT_XY
0177	GPUREG_LIGHT3_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT3_SPOT_Z
0178	GPUREG_0178
0179	GPUREG_LIGHT3_CONFIG	?	PICA_REG_FRAG_LIGHT3_TYPE
017A	GPUREG_LIGHT3_ATTENUATION_BIAS	?	PICA_REG_FRAG_LIGHT3_DIST_ATTN_BIAS
017B	GPUREG_LIGHT3_ATTENUATION_SCALE	?	PICA_REG_FRAG_LIGHT3_DIST_ATTN_SCALE
017C	GPUREG_017C
017D	GPUREG_017D
017E	GPUREG_017E
017F	GPUREG_017F
0180	GPUREG_LIGHT4_SPECULAR0	?	PICA_REG_FRAG_LIGHT4_SPECULAR0
0181	GPUREG_LIGHT4_SPECULAR1	?	PICA_REG_FRAG_LIGHT4_SPECULAR1
0182	GPUREG_LIGHT4_DIFFUSE	?	PICA_REG_FRAG_LIGHT4_DIFFUSE
0183	GPUREG_LIGHT4_AMBIENT	?	PICA_REG_FRAG_LIGHT4_AMBIENT
0184	GPUREG_LIGHT4_XY	?	PICA_REG_FRAG_LIGHT4_POSITION_XY
0185	GPUREG_LIGHT4_Z	?	PICA_REG_FRAG_LIGHT4_POSITION_Z
0186	GPUREG_LIGHT4_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT4_SPOT_XY
0187	GPUREG_LIGHT4_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT4_SPOT_Z
0188	GPUREG_0188
0189	GPUREG_LIGHT4_CONFIG	?	PICA_REG_FRAG_LIGHT4_TYPE
018A	GPUREG_LIGHT4_ATTENUATION_BIAS	?	PICA_REG_FRAG_LIGHT4_DIST_ATTN_BIAS
018B	GPUREG_LIGHT4_ATTENUATION_SCALE	?	PICA_REG_FRAG_LIGHT4_DIST_ATTN_SCALE
018C	GPUREG_018C
018D	GPUREG_018D
018E	GPUREG_018E
018F	GPUREG_018F
0190	GPUREG_LIGHT5_SPECULAR0	?	PICA_REG_FRAG_LIGHT5_SPECULAR0
0191	GPUREG_LIGHT5_SPECULAR1	?	PICA_REG_FRAG_LIGHT5_SPECULAR1
0192	GPUREG_LIGHT5_DIFFUSE	?	PICA_REG_FRAG_LIGHT5_DIFFUSE
0193	GPUREG_LIGHT5_AMBIENT	?	PICA_REG_FRAG_LIGHT5_AMBIENT
0194	GPUREG_LIGHT5_XY	?	PICA_REG_FRAG_LIGHT5_POSITION_XY
0195	GPUREG_LIGHT5_Z	?	PICA_REG_FRAG_LIGHT5_POSITION_Z
0196	GPUREG_LIGHT5_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT5_SPOT_XY
0197	GPUREG_LIGHT5_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT5_SPOT_Z
0198	GPUREG_0198
0199	GPUREG_LIGHT5_CONFIG	?	PICA_REG_FRAG_LIGHT5_TYPE
019A	GPUREG_LIGHT5_ATTENUATION_BIAS
019B	GPUREG_LIGHT5_ATTENUATION_SCALE
019C	GPUREG_019C
019D	GPUREG_019D
019E	GPUREG_019E
019F	GPUREG_019F
01A0	GPUREG_LIGHT6_SPECULAR0	?	PICA_REG_FRAG_LIGHT6_SPECULAR0
01A1	GPUREG_LIGHT6_SPECULAR1	?	PICA_REG_FRAG_LIGHT6_SPECULAR1
01A2	GPUREG_LIGHT6_DIFFUSE		PICA_REG_FRAG_LIGHT6_DIFFUSE
01A3	GPUREG_LIGHT6_AMBIENT		PICA_REG_FRAG_LIGHT6_AMBIENT
01A4	GPUREG_LIGHT6_XY		PICA_REG_FRAG_LIGHT6_POSITION_XY
01A5	GPUREG_LIGHT6_Z		PICA_REG_FRAG_LIGHT6_POSITION_Z
01A6	GPUREG_LIGHT6_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT6_SPOT_XY
01A7	GPUREG_LIGHT6_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT6_SPOT_Z
01A8	GPUREG_01A8
01A9	GPUREG_LIGHT6_CONFIG	?	PICA_REG_FRAG_LIGHT6_TYPE
01AA	GPUREG_LIGHT6_ATTENUATION_BIAS
01AB	GPUREG_LIGHT6_ATTENUATION_SCALE
01AC	GPUREG_01AC
01AD	GPUREG_01AD
01AE	GPUREG_01AE
01AF	GPUREG_01AF
01B0	GPUREG_LIGHT7_SPECULAR0	?	PICA_REG_FRAG_LIGHT7_SPECULAR0
01B1	GPUREG_LIGHT7_SPECULAR1	?	PICA_REG_FRAG_LIGHT7_SPECULAR1
01B2	GPUREG_LIGHT7_DIFFUSE	?	PICA_REG_FRAG_LIGHT7_DIFFUSE
01B3	GPUREG_LIGHT7_AMBIENT	?	PICA_REG_FRAG_LIGHT7_AMBIENT
01B4	GPUREG_LIGHT7_XY	?	PICA_REG_FRAG_LIGHT7_POSITION_XY
01B5	GPUREG_LIGHT7_Z	?	PICA_REG_FRAG_LIGHT7_POSITION_Z
01B6	GPUREG_LIGHT7_SPOTDIR_XY	?	PICA_REG_FRAG_LIGHT7_SPOT_XY
01B7	GPUREG_LIGHT7_SPOTDIR_Z	?	PICA_REG_FRAG_LIGHT7_SPOT_Z
01B8	GPUREG_01B8
01B9	GPUREG_LIGHT7_CONFIG	?	PICA_REG_FRAG_LIGHT7_TYPE
01BA	GPUREG_LIGHT7_ATTENUATION_BIAS
01BB	GPUREG_LIGHT7_ATTENUATION_SCALE
01BC	GPUREG_01BC
01BD	GPUREG_01BD
01BE	GPUREG_01BE
01BF	GPUREG_01BF
01C0	GPUREG_LIGHTING_AMBIENT	?	PICA_REG_FRAG_LIGHT_AMBIENT
01C1	GPUREG_01C1
01C2	GPUREG_LIGHTING_NUM_LIGHTS	?	PICA_REG_FRAG_LIGHT_SRC_NUM
01C3	GPUREG_LIGHTING_CONFIG0	?	PICA_REG_FRAG_LIGHT_FUNC_MODE0
01C4	GPUREG_LIGHTING_CONFIG1	?	PICA_REG_FRAG_LIGHT_FUNC_MODE1
01C5	GPUREG_LIGHTING_LUT_INDEX	?	PICA_REG_FRAG_LIGHT_LUT
01C6	GPUREG_LIGHTING_ENABLE1	?	PICA_REG_FRAG_LIGHT_EN1
01C7	GPUREG_01C7
01C8	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA0
01C9	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA1
01CA	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA2
01CB	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA3
01CC	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA4
01CD	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA5
01CE	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA6
01CF	GPUREG_LIGHTING_LUT_DATA	?	PICA_REG_FRAG_LIGHT_LUT_DATA7
01D0	GPUREG_LIGHTING_LUTINPUT_ABS	?	PICA_REG_FRAG_LIGHT_ABSLUTINPUT
01D1	GPUREG_LIGHTING_LUTINPUT_SELECT	?	PICA_REG_FRAG_LIGHT_LUTINPUT
01D2	GPUREG_LIGHTING_LUTINPUT_SCALE	?	PICA_REG_FRAG_LIGHT_LUTSCALE
01D3	GPUREG_01D3
01D4	GPUREG_01D4
01D5	GPUREG_01D5
01D6	GPUREG_01D6
01D7	GPUREG_01D7
01D8	GPUREG_01D8
01D9	GPUREG_LIGHTING_LIGHT_PERMUTATION	?	PICA_REG_FRAG_LIGHT_SRC_EN_ID
01DA	GPUREG_01DA
01DB	GPUREG_01DB
01DC	GPUREG_01DC
01DD	GPUREG_01DD
01DE	GPUREG_01DE
01DF	GPUREG_01DF
01E0	GPUREG_01E0
01E1	GPUREG_01E1
01E2	GPUREG_01E2
01E3	GPUREG_01E3
01E4	GPUREG_01E4
01E5	GPUREG_01E5
01E6	GPUREG_01E6
01E7	GPUREG_01E7
01E8	GPUREG_01E8
01E9	GPUREG_01E9
01EA	GPUREG_01EA
01EB	GPUREG_01EB
01EC	GPUREG_01EC
01ED	GPUREG_01ED
01EE	GPUREG_01EE
01EF	GPUREG_01EF
01F0	GPUREG_01F0
01F1	GPUREG_01F1
01F2	GPUREG_01F2
01F3	GPUREG_01F3
01F4	GPUREG_01F4
01F5	GPUREG_01F5
01F6	GPUREG_01F6
01F7	GPUREG_01F7
01F8	GPUREG_01F8
01F9	GPUREG_01F9
01FA	GPUREG_01FA
01FB	GPUREG_01FB
01FC	GPUREG_01FC
01FD	GPUREG_01FD
01FE	GPUREG_01FE
01FF	GPUREG_01FF

Geometry pipeline registers (0x200-0x27F)

Register ID	Register name	Notes	Official Name
0200	GPUREG_ATTRIBBUFFERS_LOC		PICA_REG_VTX_ATTR_ARRAYS_BASE_ADDR
0201	GPUREG_ATTRIBBUFFERS_FORMAT_LOW		PICA_REG_VTX_ATTR_ARRAYS0
0202	GPUREG_ATTRIBBUFFERS_FORMAT_HIGH		PICA_REG_VTX_ATTR_ARRAYS1
0203	GPUREG_ATTRIBBUFFER0_OFFSET		PICA_REG_LOAD_ARRAY0_ATTR_OFFSET
0204	GPUREG_ATTRIBBUFFER0_CONFIG1		PICA_REG_LOAD_ARRAY0_ELEMENT0
0205	GPUREG_ATTRIBBUFFER0_CONFIG2		PICA_REG_LOAD_ARRAY0_ELEMENT1
0206	GPUREG_ATTRIBBUFFER1_OFFSET
0207	GPUREG_ATTRIBBUFFER1_CONFIG1
0208	GPUREG_ATTRIBBUFFER1_CONFIG2
0209	GPUREG_ATTRIBBUFFER2_OFFSET
020A	GPUREG_ATTRIBBUFFER2_CONFIG1
020B	GPUREG_ATTRIBBUFFER2_CONFIG2
020C	GPUREG_ATTRIBBUFFER3_OFFSET
020D	GPUREG_ATTRIBBUFFER3_CONFIG1
020E	GPUREG_ATTRIBBUFFER3_CONFIG2
020F	GPUREG_ATTRIBBUFFER4_OFFSET
0210	GPUREG_ATTRIBBUFFER4_CONFIG1
0211	GPUREG_ATTRIBBUFFER4_CONFIG2
0212	GPUREG_ATTRIBBUFFER5_OFFSET
0213	GPUREG_ATTRIBBUFFER5_CONFIG1
0214	GPUREG_ATTRIBBUFFER5_CONFIG2
0215	GPUREG_ATTRIBBUFFER6_OFFSET
0216	GPUREG_ATTRIBBUFFER6_CONFIG1
0217	GPUREG_ATTRIBBUFFER6_CONFIG2
0218	GPUREG_ATTRIBBUFFER7_OFFSET
0219	GPUREG_ATTRIBBUFFER7_CONFIG1
021A	GPUREG_ATTRIBBUFFER7_CONFIG2
021B	GPUREG_ATTRIBBUFFER8_OFFSET
021C	GPUREG_ATTRIBBUFFER8_CONFIG1
021D	GPUREG_ATTRIBBUFFER8_CONFIG2
021E	GPUREG_ATTRIBBUFFER9_OFFSET
021F	GPUREG_ATTRIBBUFFER9_CONFIG1
0220	GPUREG_ATTRIBBUFFER9_CONFIG2
0221	GPUREG_ATTRIBBUFFER10_OFFSET
0222	GPUREG_ATTRIBBUFFER10_CONFIG1
0223	GPUREG_ATTRIBBUFFER10_CONFIG2
0224	GPUREG_ATTRIBBUFFER11_OFFSET
0225	GPUREG_ATTRIBBUFFER11_CONFIG1
0226	GPUREG_ATTRIBBUFFER11_CONFIG2
0227	GPUREG_INDEXBUFFER_CONFIG		PICA_REG_INDEX_ARRAY_ADDR_OFFSET
0228	GPUREG_NUMVERTICES		PICA_REG_DRAW_VERTEX_NUM
0229	GPUREG_GEOSTAGE_CONFIG	?	PICA_REG_DRAW_MODE0
022A	GPUREG_VERTEX_OFFSET		PICA_REG_DRAW_VERTEX_OFFSET
022B	GPUREG_022B
022C	GPUREG_022C
022D	GPUREG_022D
022E	GPUREG_DRAWARRAYS		PICA_REG_START_DRAW_ARRAY
022F	GPUREG_DRAWELEMENTS		PICA_REG_START_DRAW_ELEMENT
0230	GPUREG_0230
0231	GPUREG_0231	?	PICA_REG_VTX_FUNC
0232	GPUREG_FIXEDATTRIB_INDEX	?	PICA_REG_VS_FIXED_ATTR
0233	GPUREG_FIXEDATTRIB_DATA	?	PICA_REG_VS_FIXED_ATTR_DATA0
0234	GPUREG_FIXEDATTRIB_DATA	?	PICA_REG_VS_FIXED_ATTR_DATA1
0235	GPUREG_FIXEDATTRIB_DATA	?	PICA_REG_VS_FIXED_ATTR_DATA2
0236	GPUREG_0236
0237	GPUREG_0237
0238	GPUREG_CMDBUF_SIZE0
0239	GPUREG_CMDBUF_SIZE1
023A	GPUREG_CMDBUF_ADDR0
023B	GPUREG_CMDBUF_ADDR1
023C	GPUREG_CMDBUF_JUMP0
023D	GPUREG_CMDBUF_JUMP1
023E	GPUREG_023E
023F	GPUREG_023F
0240	GPUREG_0240
0241	GPUREG_0241
0242	GPUREG_0242	?	PICA_REG_VS_ATTR_NUM1
0243	GPUREG_0243
0244	GPUREG_0244	?	PICA_REG_VS_COM_MODE
0245	GPUREG_0245	?	PICA_REG_START_DRAW_FUNC0
0246	GPUREG_0246
0247	GPUREG_0247
0248	GPUREG_0248
0249	GPUREG_0249
024A	GPUREG_024A	?	PICA_REG_VS_OUT_REG_NUM1
024B	GPUREG_024B
024C	GPUREG_024C
024D	GPUREG_024D
024E	GPUREG_024E
024F	GPUREG_024F
0250	GPUREG_0250
0251	GPUREG_0251	?	PICA_REG_VS_OUT_REG_NUM2
0252	GPUREG_0252	?	PICA_REG_GS_MISC_REG0
0253	GPUREG_0253	?	PICA_REG_DRAW_MODE1
0254	GPUREG_0254	?	PICA_REG_GS_MISC_REG1
0255	GPUREG_0255
0256	GPUREG_0256
0257	GPUREG_0257
0258	GPUREG_0258
0259	GPUREG_0259
025A	GPUREG_025A
025B	GPUREG_025B
025C	GPUREG_025C
025D	GPUREG_025D
025E	GPUREG_PRIMITIVE_CONFIG	?	PICA_REG_GS_OUT_REG_NUM3 / PICA_REG_VS_OUT_REG_NUM3
025F	GPUREG_RESTART_PRIMITIVE	?	PICA_REG_START_DRAW_FUNC1
0260	GPUREG_0260
0261	GPUREG_0261
0262	GPUREG_0262
0263	GPUREG_0263
0264	GPUREG_0264
0265	GPUREG_0265
0266	GPUREG_0266
0267	GPUREG_0267
0268	GPUREG_0268
0269	GPUREG_0269
026A	GPUREG_026A
026B	GPUREG_026B
026C	GPUREG_026C
026D	GPUREG_026D
026E	GPUREG_026E
026F	GPUREG_026F
0270	GPUREG_0270
0271	GPUREG_0271
0272	GPUREG_0272
0273	GPUREG_0273
0274	GPUREG_0274
0275	GPUREG_0275
0276	GPUREG_0276
0277	GPUREG_0277
0278	GPUREG_0278
0279	GPUREG_0279
027A	GPUREG_027A
027B	GPUREG_027B
027C	GPUREG_027C
027D	GPUREG_027D
027E	GPUREG_027E
027F	GPUREG_027F

Shader registers (0x280-0x2DF)

Register ID	Register name	Notes	Official Name
Geometry shader
0280	GPUREG_GSH_BOOLUNIFORM		PICA_REG_GS_BOOL
0281	GPUREG_GSH_INTUNIFORM_I0		PICA_REG_GS_INT0
0282	GPUREG_GSH_INTUNIFORM_I1		PICA_REG_GS_INT1
0283	GPUREG_GSH_INTUNIFORM_I2		PICA_REG_GS_INT2
0284	GPUREG_GSH_INTUNIFORM_I3		PICA_REG_GS_INT3
0285	GPUREG_0285
0286	GPUREG_0286
0287	GPUREG_0287
0288	GPUREG_0288
0289	GPUREG_GSH_INPUTBUFFER_CONFIG		PICA_REG_GS_ATTR_NUM
028A	GPUREG_GSH_ENTRYPOINT		PICA_REG_GS_START_ADDR
028B	GPUREG_GSH_ATTRIBUTES_PERMUTATION_LOW		PICA_REG_GS_ATTR_IN_REG_MAP0
028C	GPUREG_GSH_ATTRIBUTES_PERMUTATION_HIGH		PICA_REG_GS_ATTR_IN_REG_MAP1
028D	GPUREG_GSH_OUTMAP_MASK		PICA_REG_GS_OUT_REG_MASK
028E	GPUREG_028E
028F	GPUREG_GSH_CODETRANSFER_END		PICA_REG_GS_PROG_RENEWAL_END
0290	GPUREG_GSH_FLOATUNIFORM_CONFIG		PICA_REG_GS_FLOAT_ADDR
0291	GPUREG_GSH_FLOATUNIFORM_INDEX		PICA_REG_GS_FLOAT_DATA1
0292	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA2
0293	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA3
0294	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA4
0295	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA5
0296	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA6
0297	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA7
0298	GPUREG_GSH_FLOATUNIFORM_DATA		PICA_REG_GS_FLOAT_DATA8
0299	GPUREG_0299
029A	GPUREG_029A
029B	GPUREG_GSH_CODETRANSFER_INDEX	?	PICA_REG_GS_PROG_ADDR
029C	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA0
029D	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA1
029E	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA2
029F	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA3
02A0	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA4
02A1	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA5
02A2	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA6
02A3	GPUREG_GSH_CODETRANSFER_DATA		PICA_REG_GS_PROG_DATA7
02A4	GPUREG_02A4
02A5	GPUREG_GSH_OPDESCS_INDEX		PICA_REG_GS_PROG_SWIZZLE_ADDR
02A6	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA0
02A7	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA1
02A8	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA2
02A9	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA3
02AA	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA4
02AB	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA5
02AC	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA6
02AD	GPUREG_GSH_OPDESCS_DATA		PICA_REG_GS_PROG_SWIZZLE_DATA7
02AE	GPUREG_02AE
02AF	GPUREG_02AF
Vertex shader
02B0	GPUREG_VSH_BOOLUNIFORM		PICA_REG_VS_BOOL
02B1	GPUREG_VSH_INTUNIFORM_I0		PICA_REG_VS_INT0
02B2	GPUREG_VSH_INTUNIFORM_I1		PICA_REG_VS_INT1
02B3	GPUREG_VSH_INTUNIFORM_I2		PICA_REG_VS_INT2
02B4	GPUREG_VSH_INTUNIFORM_I3		PICA_REG_VS_INT3
02B5	GPUREG_02B5
02B6	GPUREG_02B6
02B7	GPUREG_02B7
02B8	GPUREG_02B8
02B9	GPUREG_VSH_INPUTBUFFER_CONFIG		PICA_REG_VS_ATTR_NUM0
02BA	GPUREG_VSH_ENTRYPOINT		PICA_REG_VS_START_ADDR
02BB	GPUREG_VSH_ATTRIBUTES_PERMUTATION_LOW		PICA_REG_VS_ATTR_IN_REG_MAP0
02BC	GPUREG_VSH_ATTRIBUTES_PERMUTATION_HIGH		PICA_REG_VS_ATTR_IN_REG_MAP1
02BD	GPUREG_VSH_OUTMAP_MASK		PICA_REG_VS_OUT_REG_MASK
02BE	GPUREG_02BE
02BF	GPUREG_VSH_CODETRANSFER_END		PICA_REG_VS_PROG_RENEWAL_END
02C0	GPUREG_VSH_FLOATUNIFORM_INDEX		PICA_REG_VS_FLOAT_ADDR
02C1	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA1
02C2	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA2
02C3	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA3
02C4	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA4
02C5	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA5
02C6	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA6
02C7	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA7
02C8	GPUREG_VSH_FLOATUNIFORM_DATA		PICA_REG_VS_FLOAT_DATA8
02C9	GPUREG_02C9
02CA	GPUREG_02CA
02CB	GPUREG_VSH_CODETRANSFER_INDEX	?	PICA_REG_VS_PROG_ADDR
02CC	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA0
02CD	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA1
02CE	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA2
02CF	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA3
02D0	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA4
02D1	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA5
02D2	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA6
02D3	GPUREG_VSH_CODETRANSFER_DATA		PICA_REG_VS_PROG_DATA7
02D4	GPUREG_02D4
02D5	GPUREG_VSH_OPDESCS_INDEX	?	PICA_REG_VS_PROG_SWIZZLE_ADDR
02D6	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA0
02D7	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA1
02D8	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA2
02D9	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA3
02DA	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA4
02DB	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA5
02DC	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA6
02DD	GPUREG_VSH_OPDESCS_DATA		PICA_REG_VS_PROG_SWIZZLE_DATA7
02DE	GPUREG_02DE
02DF	GPUREG_02DF

Unknown registers (0x2E0-0x2FF)

Register ID	Register name	Notes	Official Name
02E0	GPUREG_02E0
02E1	GPUREG_02E1
02E2	GPUREG_02E2
02E3	GPUREG_02E3
02E4	GPUREG_02E4
02E5	GPUREG_02E5
02E6	GPUREG_02E6
02E7	GPUREG_02E7
02E8	GPUREG_02E8
02E9	GPUREG_02E9
02EA	GPUREG_02EA
02EB	GPUREG_02EB
02EC	GPUREG_02EC
02ED	GPUREG_02ED
02EE	GPUREG_02EE
02EF	GPUREG_02EF
02F0	GPUREG_02F0
02F1	GPUREG_02F1
02F2	GPUREG_02F2
02F3	GPUREG_02F3
02F4	GPUREG_02F4
02F5	GPUREG_02F5
02F6	GPUREG_02F6
02F7	GPUREG_02F7
02F8	GPUREG_02F8
02F9	GPUREG_02F9
02FA	GPUREG_02FA
02FB	GPUREG_02FB
02FC	GPUREG_02FC
02FD	GPUREG_02FD
02FE	GPUREG_02FE
02FF	GPUREG_02FF

Miscellaneous registers

GPUREG_FINALIZE

Writing to this register seems to signal the GPU to stop processing GPU commands from the current buffer; any command following a write to this register will be ignored. The value written to this register does not appear to matter, although 0x12345678 is the value typically written by commercial software. Failure to write to this register in any command buffer will result in the GPU hanging.

Framebuffer registers

GPUREG_FRAMEBUFFER_INVALIDATE

Writing 1 to this register invalidates the framebuffer cache. This should be done when changing the framebuffer or when it is cleared before rendering. Note that it does not flush the cache, so it should always be preceded by a write to GPUREG_FRAMEBUFFER_FLUSH.

GPUREG_FRAMEBUFFER_FLUSH

Writing 1 to this register flushes the framebuffer cache to memory. This should be done after rendering before changing the framebuffer or using rendering results.

GPUREG_DEPTHBUFFER_FORMAT

The format the current depth buffer should be written into. Following values are possible:

Value	Description
0	16-bit depth
1	?? seems to freeze the GPU
2	24-bit depth
3	24-bit depth + 8-bit stencil (stencil is within bit 24-31)

GPUREG_COLORBUFFER_FORMAT

Describes the format of the current color buffer used for 3D rendering.

Bits	Description
0-7	Pixel size (0=16-bit, 1=24-bit, 2=32-bit, 3=64-bit?)
16-23	Framebuffer Format (0=GL_RGBA8, 1=GL_RGB8, 2=GL_RGB5_A1, 3=GL_R5_G6_B5, 4=GL_RGBA4). Note that these values are slightly different from those in GPU#Framebuffer_color_formats. Color components are laid out in reverse byte order, with the most significant bits used first.

GPUREG_FRAMEBUFFER_BLOCK32

When set to 0, use regular 8x8 tiling format for the framebuffer, compatible with textures. When set to 1, use a 32x32 tiling format. To untile the color buffer when using this format, use bit 16 of the display transfer flags. It is unknown if there are any advantages to using the 32x32 format.

Fragment lighting registers

GPUREG_LIGHTING_ENABLE0

This register is set to 0 when fragment lighting is disabled, and to 1 when it is enabled.

GPUREG_LIGHTING_ENABLE1

This register is set to 1 when fragment lighting is disabled, and to 0 when it is enabled.

GPUREG_LIGHTING_CONFIG0

Bits	Description
0	Shadow factor enable, usually set to bit16 OR bit18 OR bit19
1	Unknown, set to 0
2-3	"Fresnel selector" (see below)
4-7	"Config", "Light env config" (see below)
8-15	Unknown, set to 4
16	"Shadow primary", 0=disabled, 1=enabled
17	"Shadow secondary", 0=disabled, 1=enabled
18	"Invert shadow", 0=disabled, 1=enabled
19	"Shadow alpha", 0=disabled, 1=enabled
20-21	Unknown, set to 0
22-23	"Bump selector"
24-25	"Shadow selector"
26	Unknown, set to 0
27	"Clamp highlights", 0=disabled, 1=enabled
28-29	"Bump mode", "Light env texy usage" (see below)
30	"Bump renorm", 0=enabled, 1=disabled
31	Unknown, set to 1

Fresnel selector constants:

Value	Description
0	NO_FRESNEL
1	PRI_ALPHA_FRESNEL
2	SEC_ALPHA_FRESNEL
3	PRI_SEC_ALPHA_FRESNEL

Light env config constants:

Value	Description
0	LIGHT_ENV_LAYER_CONFIG0
1	LIGHT_ENV_LAYER_CONFIG1
2	LIGHT_ENV_LAYER_CONFIG2
3	LIGHT_ENV_LAYER_CONFIG3
4	LIGHT_ENV_LAYER_CONFIG4
5	LIGHT_ENV_LAYER_CONFIG5
6	LIGHT_ENV_LAYER_CONFIG6
8 (sic)	LIGHT_ENV_LAYER_CONFIG7

Bump mode constants:

Value	Description
0	BUMP_NOT_USED
1	BUMP_AS_BUMP
2	BUMP_AS_TANG

Bit 30 is set when bump mode is not zero.

GPUREG_LIGHTING_CONFIG1

Bits	Description
0	Disable bit for frag light source 0 shadows
1	Disable bit for frag light source 1 shadows
2	Disable bit for frag light source 2 shadows
3	Disable bit for frag light source 3 shadows
4	Disable bit for frag light source 4 shadows
5	Disable bit for frag light source 5 shadows
6	Disable bit for frag light source 6 shadows
7	Disable bit for frag light source 7 shadows
8	Disable bit for frag light source 0 spot
9	Disable bit for frag light source 1 spot
10	Disable bit for frag light source 2 spot
11	Disable bit for frag light source 3 spot
12	Disable bit for frag light source 4 spot
13	Disable bit for frag light source 5 spot
14	Disable bit for frag light source 6 spot
15	Disable bit for frag light source 7 spot
16	Disable bit for lut_D0
17	Disable bit for lut_D1
18	Unknown, set to 1
19	Disable bit for lut_FR
20	Disable bit for lut_RB
21	Disable bit for lut_RG
22	Disable bit for lut_RR
23	Unknown, set to 1
24	Disable bit for frag light source 0 distance attenuation
25	Disable bit for frag light source 1 distance attenuation
26	Disable bit for frag light source 2 distance attenuation
27	Disable bit for frag light source 3 distance attenuation
28	Disable bit for frag light source 4 distance attenuation
29	Disable bit for frag light source 5 distance attenuation
30	Disable bit for frag light source 6 distance attenuation
31	Disable bit for frag light source 7 distance attenuation

GPUREG_LIGHTING_NUM_LIGHTS

The number of active lights minus one (0..7) is written to this register.

GPUREG_LIGHTING_LIGHT_PERMUTATION

Bits	Description
0-2	ID of the 1st enabled light (0..7)
4-6	ID of the 2nd enabled light (0..7)
8-10	ID of the 3rd enabled light (0..7)
12-14	ID of the 4th enabled light (0..7)
16-18	ID of the 5th enabled light (0..7)
20-22	ID of the 6th enabled light (0..7)
24-26	ID of the 7th enabled light (0..7)
28-30	ID of the 8th enabled light (0..7)

GPUREG_LIGHTING_LUTINPUT_SELECT

Bits	Description
0-3	Input selector for lut_D0
4-7	Input selector for lut_D1
8-11	Input selector for lut_SP
12-15	Input selector for lut_FR
16-19	Input selector for lut_RB
20-23	Input selector for lut_RG
24-27	Input selector for lut_RR
28-31	Input selector for lut_DA

Input selector values:

Value	Description
0	N·H
1	V·H
2	N·V
3	L·N
4	-L·P (aka Spotlight aka SP)
5	cos φ (aka CP)

GPUREG_LIGHTING_LUTINPUT_ABS

Bits	Description
1	abs() flag for the input of lut_D0 (0=enabled, 1=disabled)
5	abs() flag for the input of lut_D1 (0=enabled, 1=disabled)
9	abs() flag for the input of lut_SP (0=enabled, 1=disabled)
13	abs() flag for the input of lut_FR (0=enabled, 1=disabled)
17	abs() flag for the input of lut_RB (0=enabled, 1=disabled)
21	abs() flag for the input of lut_RG (0=enabled, 1=disabled)
25	abs() flag for the input of lut_RR (0=enabled, 1=disabled)
29	abs() flag for the input of lut_DA (0=enabled, 1=disabled)

This register controls whether the absolute value of the input is taken before using a LUT.

GPUREG_LIGHTING_LUTINPUT_SCALE

Bits	Description
0-3	Scaler selector for lut_D0
4-7	Scaler selector for lut_D1
8-11	Scaler selector for lut_SP
12-15	Scaler selector for lut_FR
16-19	Scaler selector for lut_RB
20-23	Scaler selector for lut_RG
24-27	Scaler selector for lut_RR
28-31	Scaler selector for lut_DA

Scaler selector values:

Value	Description
0	1x
1	2x
2	4x
3	8x
6	0.25x
7	0.5x

This register controls the scaling that is applied to the output of a LUT.

GPUREG_LIGHTING_LUT_INDEX

This register controls which LUT and what offset into it the LUT_DATA register writes to.

Bits	Description
0-7	Starting entry offset (0...255)
8-10	LUT ID (context=0) or Light ID (context=1,2)
11-12	Context ID

LUT ID values:

Value	Description
0	lut_D0
1	lut_D1
3	lut_FR
4	lut_RB
5	lut_RG
6	lut_RR

Context ID values:

Value	Description
0	LUTs common to all lights - writes to the LUT selected by the ID
1	lut_SP - writes to the LUT specific to the selected light
2	lut_DA - writes to the LUT specific to the selected light

GPUREG_LIGHTING_LUT_DATA

Lighting LUT data is written here.

A LUT contains data for the input domain [-1.0, 1.0], which is indexed using a signed 8-bit number [-128, 127]. Therefore a LUT contains 256 entries. The index of a value is (int)(x/127.0f) & 0xFF.

Format of an entry:

Bits	Description
0-11	Entry value (12bit fractional number; floatval = x / 4096; however 0xFFF is treated as 1.0)
12-22	Absolute value of the difference between the next entry and this entry (11bit fractional number; floatval = x / 2048; however 0x7FF is treated as 1.0)
23	Sign bit of the difference (0=positive, 1=negative)

GPUREG_LIGHTING_AMBIENT

Bits	Description
0-7	Blue component (0..255)
10-17	Green component (0..255)
20-27	Red component (0..255)

This register contains the initial value of the fragment primary color before the partial colors that correspond to each enabled light are added. Usually set to material_emission + material_ambient*scene_ambient.

GPUREG_LIGHTx_CONFIG

Bits	Description
0	Light type (0 = positional light, 1 = directional light)
1	Two side diffuse (0=disable, 1=enable)
2	Geometric factor 0 (0=disable, 1=enable)
3	Geometric factor 1 (0=disable, 1=enable)

GPUREG_LIGHTx_XY

Bits	Description
0-15	X coordinate (float16 = 1.5.10)
16-31	Y coordinate (float16 = 1.5.10)

These registers (along with _Z) represent the light position (for a positional light) or the light direction vector (for a directional light) of the corresponding light.

GPUREG_LIGHTx_Z

Bits	Description
0-15	Z coordinate (float16 = 1.5.10)

These registers (along with _XY) represent the light position (for a positional light) or the light direction vector (for a directional light) of the corresponding light.

GPUREG_LIGHTx_SPOTDIR_XY

Bits	Description
0-12	X coordinate (2.11 signed fixed point) (Usually the input value is negated)
16-28	Y coordinate (2.11 signed fixed point) (Usually the input value is negated)

These registers (along with _Z) represent the spot direction (unitary) vector of the corresponding light .

GPUREG_LIGHTx_SPOTDIR_Z

Bits	Description
0-12	Z coordinate (2.11 signed fixed point) (Usually the input value is negated)

These registers (along with _XY) represent the spot direction (unitary) vector of the corresponding light.

GPUREG_LIGHTx_ATTENUATION_BIAS

These registers contain the distance attenuation bias value (float20 = 1.7.12) of the corresponding light.

GPUREG_LIGHTx_ATTENUATION_SCALE

These registers contain the distance attenuation scale value (float20 = 1.7.12) of the corresponding light.

GPUREG_LIGHTx_AMBIENT

These registers contain the ambient color (same format as GPUREG_LIGHTING_AMBIENT) of the corresponding light. Usually set to material_ambient*lightX_ambient.

GPUREG_LIGHTx_DIFFUSE

These registers contain the diffuse color (same format as GPUREG_LIGHTING_AMBIENT) of the corresponding light. Usually set to material_diffuse*lightX_diffuse.

GPUREG_LIGHTx_SPECULAR0

These registers contain the specular0 color (same format as GPUREG_LIGHTING_AMBIENT) of the corresponding light. Usually set to material_specular0*lightX_specular0.

GPUREG_LIGHTx_SPECULAR1

These registers contain the specular1 color (same format as GPUREG_LIGHTING_AMBIENT) of the corresponding light. Usually set to material_specular1*lightX_specular1.

Geometry pipeline registers

GPUREG_GEOSTAGE_CONFIG

Bits	Description
0-7	Geometry stage mode. (0=Vertex shader only, 2=Vertex shader + geometry shader)
8	Unknown. Seems to skip every other triangle when used with indexed rendering and without geoshaders. Has no effect with non-indexed rendering without geoshaders. If this is 0, you don't need to use GPU_UNKPRIM with DrawElements.
9-15	No effect.
16-23	Unknown.
24-31	Unknown. Often set to 0.

This register configures the geometry stage of the GPU pipeline.

GPUREG_FIXEDATTRIB_INDEX

See GPU/Fixed Vertex Attributes and GPU/Immediate-Mode Vertex Submission for usage info.

Bits	Description
0-31	Sets the active fixed attribute index. This is the fixed attribute which will be set when writing to GPUREG_FIXEDATTRIB_DATA. Valid values are 0-11. If the special value 0xF is written here, this sets up immediate-mode vertex submission instead, and writes to the data register will input vertex data directly into the pipeline.

GPUREG_FIXEDATTRIB_DATA

Accepts a packed 4-tuple of float24 values (in the same format used for specifying shader uniforms). This is stored as the fixed attribute value for the attribute currently specified in the index register. Attributes are always specified as a 4-tuple of floats, regardless of the format configured in GPUREG_ATTRIBBUFFERS_FORMAT_HIGH.

If immediate-mode vertex submission is enabled (by writing 0xF to the index register) then vertex data is input here directly. The index register does not need to be re-set after each write.

GPUREG_RESTART_PRIMITIVE

Bits	Description
0-7	Writing 0x01 to this field ends the current triangle strip or fan. This is necessary before using these kinds of primitives with immediate-mode, but most games seem to write to it before every draw call.

Geometry shader registers

GPUREG_GSH_BOOLUNIFORM

Bits	Description
0	Value of geometry shader unit's b0 boolean register. (0=true, 1=false)
1	Value of geometry shader unit's b1 boolean register. (0=true, 1=false)
2	Value of geometry shader unit's b2 boolean register. (0=true, 1=false)
3	Value of geometry shader unit's b3 boolean register. (0=true, 1=false)
4	Value of geometry shader unit's b4 boolean register. (0=true, 1=false)
5	Value of geometry shader unit's b5 boolean register. (0=true, 1=false)
6	Value of geometry shader unit's b6 boolean register. (0=true, 1=false)
7	Value of geometry shader unit's b7 boolean register. (0=true, 1=false)
8	Value of geometry shader unit's b8 boolean register. (0=true, 1=false)
9	Value of geometry shader unit's b9 boolean register. (0=true, 1=false)
10	Value of geometry shader unit's b10 boolean register. (0=true, 1=false)
11	Value of geometry shader unit's b11 boolean register. (0=true, 1=false)
12	Value of geometry shader unit's b12 boolean register. (0=true, 1=false)
13	Value of geometry shader unit's b13 boolean register. (0=true, 1=false)
14	Value of geometry shader unit's b14 boolean register. (0=true, 1=false)
15	Value of geometry shader unit's b15 boolean register. (0=true, 1=false)
16-31	Unknown. This seems to always be set to 0x7FFF, and other values may cause the GPU to hang

This register is used to set the geometry shader unit's boolean registers.

GPUREG_GSH_INTUNIFORM_I0

Bits	Description
0-7	Value for geometry shader's i0.x (u8, 0-255)
8-15	Value for geometry shader's i0.y (u8, 0-255)
16-23	Value for geometry shader's i0.z (u8, 0-255)
24-31	Value for geometry shader's i0.w (u8, 0-255)

This register is used to set the geometry shader's i0 integer register.

GPUREG_GSH_INTUNIFORM_I1

Bits	Description
0-7	Value for geometry shader's i1.x (u8, 0-255)
8-15	Value for geometry shader's i1.y (u8, 0-255)
16-23	Value for geometry shader's i1.z (u8, 0-255)
24-31	Value for geometry shader's i1.w (u8, 0-255)

This register is used to set the geometry shader's i1 integer register.

GPUREG_GSH_INTUNIFORM_I2

Bits	Description
0-7	Value for geometry shader's i2.x (u8, 0-255)
8-15	Value for geometry shader's i2.y (u8, 0-255)
16-23	Value for geometry shader's i2.z (u8, 0-255)
24-31	Value for geometry shader's i2.w (u8, 0-255)

This register is used to set the geometry shader's i2 integer register.

GPUREG_GSH_INTUNIFORM_I3

Bits	Description
0-7	Value for geometry shader's i3.x (u8, 0-255)
8-15	Value for geometry shader's i3.y (u8, 0-255)
16-23	Value for geometry shader's i3.z (u8, 0-255)
24-31	Value for geometry shader's i3.w (u8, 0-255)

This register is used to set the geometry shader's i3 integer register.

GPUREG_GSH_INPUTBUFFER_CONFIG

Bits	Description
0-7	Input buffer stride minus 1, in float vec4 registers. (value 0 means a stride of 1 float vec4 register)
8-23	Unknown. These bits typically aren't updated by games.
24-31	Unknown. This is typically set to 8 for geometry shaders.

This register is used to configure the geometry shader's input buffer. In the context of a geometry shader, the stride parameter can be interpreted as the input primitive size in registers, though it is not a limit on the number of input registers which can be accessed from the geometry shader.

GPUREG_GSH_ENTRYPOINT

Bits	Description
0-15	Geometry shader unit entrypoint, in words.
16-31	Unknown. This seems to always be set to 0x7FFF, and other values may cause the GPU to hang

This sets the entrypoint for the program running on the single shader unit which can be dedicated to running geometry shaders, regardless of the current geometry stage mode. This is means that while this register is normally used to set the geometry shader entrypoint, it can also be used to set this single shader unit to run from a different entrypoint than the other three even when running a vertex shader.

GPUREG_GSH_ATTRIBUTES_PERMUTATION_LOW

Bits	Description
0-3	Index of geometry shader input register which the 1st attribute will be stored in.
4-7	Index of geometry shader input register which the 2nd attribute will be stored in.
8-11	Index of geometry shader input register which the 3rd attribute will be stored in.
12-15	Index of geometry shader input register which the 4th attribute will be stored in.
16-19	Index of geometry shader input register which the 5th attribute will be stored in.
20-23	Index of geometry shader input register which the 6th attribute will be stored in.
24-27	Index of geometry shader input register which the 7th attribute will be stored in.
28-31	Index of geometry shader input register which the 8th attribute will be stored in.

This register sets the geometry shader input register index which will correspond to each attribute contained by the input buffer (which in the case of geometry shaders is the vertex shader output buffer) for the first 8 attributes. For example, having bits 0-3 set to 5 means that, in the geometry shader program, v5 will contain the input buffer's 1st attribute.

GPUREG_GSH_ATTRIBUTES_PERMUTATION_HIGH

Bits	Description
0-3	Index of geometry shader input register which the 9th attribute will be stored in.
4-7	Index of geometry shader input register which the 10th attribute will be stored in.
8-11	Index of geometry shader input register which the 11th attribute will be stored in.
12-15	Index of geometry shader input register which the 12th attribute will be stored in.
16-19	Index of geometry shader input register which the 13th attribute will be stored in.
20-23	Index of geometry shader input register which the 14th attribute will be stored in.
24-27	Index of geometry shader input register which the 15th attribute will be stored in.
28-31	Index of geometry shader input register which the 16th attribute will be stored in.

This register sets the geometry shader input register index which will correspond to each attribute contained by the input buffer (which in the case of geometry shaders is the vertex shader output buffer) for attributes 8 through 15. For example, having bits 0-3 set to 5 means that, in the geometry shader program, v5 will contain the input buffer's 9th attribute.

GPUREG_GSH_OUTMAP_MASK

Bits	Description
0	Enable bit for geometry shader's o0 output register. (1 = o0 enabled, 0 = o0 disabled)
1	Enable bit for geometry shader's o1 output register. (1 = o1 enabled, 0 = o1 disabled)
2	Enable bit for geometry shader's o2 output register. (1 = o2 enabled, 0 = o2 disabled)
3	Enable bit for geometry shader's o3 output register. (1 = o3 enabled, 0 = o3 disabled)
4	Enable bit for geometry shader's o4 output register. (1 = o4 enabled, 0 = o4 disabled)
5	Enable bit for geometry shader's o5 output register. (1 = o5 enabled, 0 = o5 disabled)
6	Enable bit for geometry shader's o6 output register. (1 = o6 enabled, 0 = o6 disabled)

This register toggles the geometry shader unit's output registers.

GPUREG_GSH_CODETRANSFER_END

Bits	Description
0	Code data transfer end signal bit.

This register's value should be set to 1 in order to finalize the transfer of geometry shader code. It is unknown whether this register is used for other functions.

GPUREG_GSH_FLOATUNIFORM_CONFIG

Bits	Description
0-6	Target float vec4 geometry shader uniform ID for transfer. (range 0-95, where 0 = c0 and 95 = c95)
31	Float vec4 geometry shader uniform data transfer mode. (0 = float24, 1 = float32)

This register sets the target float vec4 geometry shader uniform ID and transfer mode for the data transfer system. As such it is typically used right before GPUREG_GSH_FLOATUNIFORM_DATA, though writing to one register does not make writing to the other mandatory.

GPUREG_GSH_FLOATUNIFORM_DATA

Bits	Description
0-31	Float vec4 geometry shader uniform data. (format depends on transfer mode, see below for details)

This register is used to set the value of float vec4 geometry shader uniform registers. The data format which should be written to it depends on the transfer mode set with GPUREG_GSH_FLOATUNIFORM_CONFIG. This register functions as a FIFO queue : after each time a uniform register is successfully set, the target uniform ID value is incremented, meaning that groups of uniforms with contiguous register IDs can be set with only one initial write to GPUREG_GSH_FLOATUNIFORM_CONFIG.

• In the case of float24 transfer mode, data should be sent by writing three words which are the concatenation of the float24 value of the uniform register's 4 components, in the reverse order. Assuming each letter corresponds to 4 bits, the format becomes :
  • first word : ZZWWWWWW
  • second word : YYYYZZZZ
  • third word : XXXXXXYY
• In the case of float32 transfer mode, data should be sent by writing four words which are each the float32 value of the uniform register's 4 components, in the reverse order.

GPUREG_GSH_CODETRANSFER_CONFIG

Bits	Description
0-11	Target geometry shader code offset for data transfer.

This register is used to set the offset at which upcoming geometry shader code data transferred through GPUREG_GSH_CODETRANSFER_DATA should be written.

NOTE : as we do not yet know what a shader program's maximum size is yet, we also do not know how many bits the code offset parameter holds. The biggest shader binary observed so far was 2422 instructions long. The shader control flow instructions only have room to address 12 bits though, so it's likely that the maximum is 4095.

GPUREG_GSH_CODETRANSFER_DATA

Bits	Description
0-31	Geometry shader instruction data.

This register is used to transfer geometry shader code data. This register behaves as a FIFO queue : each write to this register writes the provided value to the GPU geometry shader code memory bank at the offset initially set by GPUREG_GSH_CODETRANSFER_CONFIG. The offset in question is incremented after each write to this register.

GPUREG_GSH_OPDESCS_CONFIG

Bits	Description
0-6	Target geometry shader operand descriptor offset for data transfer.

This register is used to set the offset at which upcoming geometry shader operand descriptor data transferred through GPUREG_GSH_OPDESCS_DATA should be written.

GPUREG_GSH_OPDESCS_DATA

Bits	Description
0-31	Geometry shader operand descriptor data.

This register is used to transfer geometry shader operand descriptor data. This register behaves as a FIFO queue : each write to this register writes the provided value to the GPU geometry shader operand descriptor memory bank at the offset initially set by GPUREG_GSH_OPDESCS_CONFIG. The offset in question is incremented after each write to this register.

Vertex shader registers

GPUREG_VSH_BOOLUNIFORM

Bits	Description
0	Value of vertex shader unit's b0 boolean register. (0=true, 1=false)
1	Value of vertex shader unit's b1 boolean register. (0=true, 1=false)
2	Value of vertex shader unit's b2 boolean register. (0=true, 1=false)
3	Value of vertex shader unit's b3 boolean register. (0=true, 1=false)
4	Value of vertex shader unit's b4 boolean register. (0=true, 1=false)
5	Value of vertex shader unit's b5 boolean register. (0=true, 1=false)
6	Value of vertex shader unit's b6 boolean register. (0=true, 1=false)
7	Value of vertex shader unit's b7 boolean register. (0=true, 1=false)
8	Value of vertex shader unit's b8 boolean register. (0=true, 1=false)
9	Value of vertex shader unit's b9 boolean register. (0=true, 1=false)
10	Value of vertex shader unit's b10 boolean register. (0=true, 1=false)
11	Value of vertex shader unit's b11 boolean register. (0=true, 1=false)
12	Value of vertex shader unit's b12 boolean register. (0=true, 1=false)
13	Value of vertex shader unit's b13 boolean register. (0=true, 1=false)
14	Value of vertex shader unit's b14 boolean register. (0=true, 1=false)
15	Value of vertex shader unit's b15 boolean register. (0=true, 1=false)
16-31	Unknown. This seems to always be set to 0x7FFF, and other values may cause the GPU to hang

This register is used to set the vertex shader unit's boolean registers.

GPUREG_VSH_INTUNIFORM_I0

Bits	Description
0-7	Value for vertex shader's i0.x (u8, 0-255)
8-15	Value for vertex shader's i0.y (u8, 0-255)
16-23	Value for vertex shader's i0.z (u8, 0-255)
24-31	Value for vertex shader's i0.w (u8, 0-255)

This register is used to set the vertex shader's i0 integer register.

GPUREG_VSH_INTUNIFORM_I1

Bits	Description
0-7	Value for vertex shader's i1.x (u8, 0-255)
8-15	Value for vertex shader's i1.y (u8, 0-255)
16-23	Value for vertex shader's i1.z (u8, 0-255)
24-31	Value for vertex shader's i1.w (u8, 0-255)

This register is used to set the vertex shader's i1 integer register.

GPUREG_VSH_INTUNIFORM_I2

Bits	Description
0-7	Value for vertex shader's i2.x (u8, 0-255)
8-15	Value for vertex shader's i2.y (u8, 0-255)
16-23	Value for vertex shader's i2.z (u8, 0-255)
24-31	Value for vertex shader's i2.w (u8, 0-255)

This register is used to set the vertex shader's i2 integer register.

GPUREG_VSH_INTUNIFORM_I3

Bits	Description
0-7	Value for vertex shader's i3.x (u8, 0-255)
8-15	Value for vertex shader's i3.y (u8, 0-255)
16-23	Value for vertex shader's i3.z (u8, 0-255)
24-31	Value for vertex shader's i3.w (u8, 0-255)

This register is used to set the vertex shader's i3 integer register.

GPUREG_VSH_INPUTBUFFER_CONFIG

Bits	Description
0-7	Input buffer stride minus 1, in float vec4 registers. (value 0 means a stride of 1 float vec4 register)
8-23	Unknown. These bits typically aren't updated by games.
24-31	Unknown. This is typically set to 0xA for vertex shaders.

This register is used to configure the vertex shader's input buffer. In the context of a geometry shader, the stride parameter can be interpreted as the number of attributes per vertex.

GPUREG_VSH_ENTRYPOINT

Bits	Description
0-15	Vertex shader entrypoint, in words.
16-31	Unknown. This seems to always be set to 0x7FFF, and other values may cause the GPU to hang

This sets the entrypoint for the program running on shader units set to vertex shader mode. Depending on the current geometry stage mode this can include either all 4 shader units or just 3 of them.

GPUREG_VSH_ATTRIBUTES_PERMUTATION_LOW

Bits	Description
0-3	Index of vertex shader input register which the 1st attribute will be stored in.
4-7	Index of vertex shader input register which the 2nd attribute will be stored in.
8-11	Index of vertex shader input register which the 3rd attribute will be stored in.
12-15	Index of vertex shader input register which the 4th attribute will be stored in.
16-19	Index of vertex shader input register which the 5th attribute will be stored in.
20-23	Index of vertex shader input register which the 6th attribute will be stored in.
24-27	Index of vertex shader input register which the 7th attribute will be stored in.
28-31	Index of vertex shader input register which the 8th attribute will be stored in.

This register sets the vertex shader input register index which will correspond to each attribute contained by the input buffer for the first 8 attributes. For example, having bits 0-3 set to 5 means that, in the vertex shader program, v5 will contain the input buffer's 1st attribute.

GPUREG_VSH_ATTRIBUTES_PERMUTATION_HIGH

Bits	Description
0-3	Index of vertex shader input register which the 9th attribute will be stored in.
4-7	Index of vertex shader input register which the 10th attribute will be stored in.
8-11	Index of vertex shader input register which the 11th attribute will be stored in.
12-15	Index of vertex shader input register which the 12th attribute will be stored in.
16-19	Index of vertex shader input register which the 13th attribute will be stored in.
20-23	Index of vertex shader input register which the 14th attribute will be stored in.
24-27	Index of vertex shader input register which the 15th attribute will be stored in.
28-31	Index of vertex shader input register which the 16th attribute will be stored in.

This register sets the vertex shader input register index which will correspond to each attribute contained by the input buffer for attributes 8 through 15. For example, having bits 0-3 set to 5 means that, in the vertex shader program, v5 will contain the input buffer's 9th attribute.

GPUREG_VSH_OUTMAP_MASK

Bits	Description
0	Enable bit for vertex shader's o0 output register. (1 = o0 enabled, 0 = o0 disabled)
1	Enable bit for vertex shader's o1 output register. (1 = o1 enabled, 0 = o1 disabled)
2	Enable bit for vertex shader's o2 output register. (1 = o2 enabled, 0 = o2 disabled)
3	Enable bit for vertex shader's o3 output register. (1 = o3 enabled, 0 = o3 disabled)
4	Enable bit for vertex shader's o4 output register. (1 = o4 enabled, 0 = o4 disabled)
5	Enable bit for vertex shader's o5 output register. (1 = o5 enabled, 0 = o5 disabled)
6	Enable bit for vertex shader's o6 output register. (1 = o6 enabled, 0 = o6 disabled)
7	Enable bit for vertex shader's o7 output register. (1 = o7 enabled, 0 = o7 disabled)
8	Enable bit for vertex shader's o8 output register. (1 = o8 enabled, 0 = o8 disabled)
9	Enable bit for vertex shader's o9 output register. (1 = o9 enabled, 0 = o9 disabled)
10	Enable bit for vertex shader's o10 output register. (1 = o10 enabled, 0 = o10 disabled)
11	Enable bit for vertex shader's o11 output register. (1 = o11 enabled, 0 = o11 disabled)
12	Enable bit for vertex shader's o12 output register. (1 = o12 enabled, 0 = o12 disabled)
13	Enable bit for vertex shader's o13 output register. (1 = o13 enabled, 0 = o13 disabled)
14	Enable bit for vertex shader's o14 output register. (1 = o14 enabled, 0 = o14 disabled)
15	Enable bit for vertex shader's o15 output register. (1 = o15 enabled, 0 = o15 disabled)

This register toggles the vertex shader units' output registers.

GPUREG_VSH_CODETRANSFER_END

Bits	Description
0	Code data transfer end signal bit.

This register's value should be set to 1 in order to finalize the transfer of vertex shader code. It is unknown whether this register is used for other functions.

GPUREG_VSH_FLOATUNIFORM_CONFIG

Bits	Description
0-6	Target float vec4 vertex shader uniform ID for transfer. (range 0-95, where 0 = c0 and 95 = c95)
31	Float vec4 vertex shader uniform data transfer mode. (0 = float24, 1 = float32)

This register sets the target float vec4 vertex shader uniform ID and transfer mode for the data transfer system. As such it is typically used right before GPUREG_VSH_FLOATUNIFORM_DATA, though writing to one register does not make writing to the other mandatory.

GPUREG_VSH_FLOATUNIFORM_DATA

Bits	Description
0-31	Float vec4 vertex shader uniform data. (format depends on transfer mode, see below for details)

This register is used to set the value of float vec4 vertex shader uniform registers. The data format which should be written to it depends on the transfer mode set with GPUREG_VSH_FLOATUNIFORM_CONFIG. This register functions as a FIFO queue : after each time a uniform register is successfully set, the target uniform ID value is incremented, meaning that groups of uniforms with contiguous register IDs can be set with only one initial write to GPUREG_VSH_FLOATUNIFORM_CONFIG.

• In the case of float24 transfer mode, data should be sent by writing three words which are the concatenation of the float24 value of the uniform register's 4 components, in the reverse order. Assuming each letter corresponds to 4 bits, the format becomes :
  • first word : ZZWWWWWW
  • second word : YYYYZZZZ
  • third word : XXXXXXYY
• In the case of float32 transfer mode, data should be sent by writing four words which are each the float32 value of the uniform register's 4 components, in the reverse order.

GPUREG_VSH_CODETRANSFER_CONFIG

Bits	Description
0-11	Target vertex shader code offset for data transfer.

This register is used to set the offset at which upcoming vertex shader code data transferred through GPUREG_VSH_CODETRANSFER_DATA should be written.

NOTE : as we do not yet know what a shader program's maximum size is yet, we also do not know how many bits the code offset parameter holds. The biggest shader binary observed so far was 2422 instructions long. The shader control flow instructions only have room to address 12 bits though, so it's likely that the maximum is 4095.

GPUREG_VSH_CODETRANSFER_DATA

Bits	Description
0-31	Vertex shader instruction data.

This register is used to transfer vertex shader code data. This register behaves as a FIFO queue : each write to this register writes the provided value to the GPU vertex shader code memory bank at the offset initially set by GPUREG_VSH_CODETRANSFER_CONFIG. The offset in question is incremented after each write to this register.

GPUREG_VSH_OPDESCS_CONFIG

Bits	Description
0-6	Target vertex shader operand descriptor offset for data transfer.

This register is used to set the offset at which upcoming vertex shader operand descriptor data transferred through GPUREG_VSH_OPDESCS_DATA should be written.

GPUREG_VSH_OPDESCS_DATA

Bits	Description
0-31	Vertex shader operand descriptor data.

This register is used to transfer vertex shader operand descriptor data. This register behaves as a FIFO queue : each write to this register writes the provided value to the GPU vertex shader operand descriptor memory bank at the offset initially set by GPUREG_VSH_OPDESCS_CONFIG. The offset in question is incremented after each write to this register.