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_CODE_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

Register ID	Register name	Notes
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
0040	GPUREG_FACECULLING_CONFIG
0041	GPUREG_0041
0042	GPUREG_0042
0043	GPUREG_0043
0044	GPUREG_0044
0045	GPUREG_0045
0046	GPUREG_0046
0047	GPUREG_0047
0048	GPUREG_0048
0049	GPUREG_0049
004A	GPUREG_004A
004B	GPUREG_004B
004C	GPUREG_004C
004D	GPUREG_DEPTHRANGE_NEAR
004E	GPUREG_DEPTHRANGE_FAR
004F	GPUREG_SH_OUTMAP_TOTAL
0050	GPUREG_SH_OUTMAP_O0
0051	GPUREG_SH_OUTMAP_O1
0052	GPUREG_SH_OUTMAP_O2
0053	GPUREG_SH_OUTMAP_O3
0054	GPUREG_SH_OUTMAP_O4
0055	GPUREG_SH_OUTMAP_O5
0056	GPUREG_SH_OUTMAP_O6
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
0062	GPUREG_0062
0063	GPUREG_0063
0064	GPUREG_0064
0065	GPUREG_SCISSORTEST_MODE
0066	GPUREG_SCISSORTEST_POS
0067	GPUREG_SCISSORTEST_DIM
0068	GPUREG_0068
0069	GPUREG_0069
006A	GPUREG_006A
006B	GPUREG_006B
006C	GPUREG_006C
006D	GPUREG_006D
006E	GPUREG_006E
006F	GPUREG_006F
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
0080	GPUREG_TEXUNITS_CONFIG
0081	GPUREG_0081
0082	GPUREG_TEXUNIT0_DIM
0083	GPUREG_TEXUNIT0_PARAM
0084	GPUREG_0084
0085	GPUREG_TEXUNIT0_LOC
0086	GPUREG_0086
0087	GPUREG_0087
0088	GPUREG_0088
0089	GPUREG_0089
008A	GPUREG_008A
008B	GPUREG_008B
008C	GPUREG_008C
008D	GPUREG_008D
008E	GPUREG_TEXUNIT0_TYPE
008F	GPUREG_008F
0090	GPUREG_0090
0091	GPUREG_0091
0092	GPUREG_TEXUNIT1_DIM
0093	GPUREG_TEXUNIT1_PARAM
0094	GPUREG_0094
0095	GPUREG_TEXUNIT1_LOC
0096	GPUREG_TEXUNIT1_TYPE
0097	GPUREG_0097
0098	GPUREG_0098
0099	GPUREG_0099
009A	GPUREG_TEXUNIT2_DIM
009B	GPUREG_TEXUNIT2_PARAM
009C	GPUREG_009C
009D	GPUREG_TEXUNIT2_LOC
009E	GPUREG_TEXUNIT2_TYPE
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
00A9	GPUREG_00A9
00AA	GPUREG_00AA
00AB	GPUREG_00AB
00AC	GPUREG_00AC
00AD	GPUREG_00AD
00AE	GPUREG_00AE
00AF	GPUREG_00AF
00B0	GPUREG_00B0
00B1	GPUREG_00B1
00B2	GPUREG_00B2
00B3	GPUREG_00B3
00B4	GPUREG_00B4
00B5	GPUREG_00B5
00B6	GPUREG_00B6
00B7	GPUREG_00B7
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_CONFIG0
00C1	GPUREG_TEXENV0_CONFIG1
00C2	GPUREG_TEXENV0_CONFIG2
00C3	GPUREG_TEXENV0_CONFIG3
00C4	GPUREG_TEXENV0_CONFIG4
00C5	GPUREG_00C5
00C6	GPUREG_00C6
00C7	GPUREG_00C7
00C8	GPUREG_TEXENV1_CONFIG0
00C9	GPUREG_TEXENV1_CONFIG1
00CA	GPUREG_TEXENV1_CONFIG2
00CB	GPUREG_TEXENV1_CONFIG3
00CC	GPUREG_TEXENV1_CONFIG4
00CD	GPUREG_00CD
00CE	GPUREG_00CE
00CF	GPUREG_00CF
00D0	GPUREG_TEXENV2_CONFIG0
00D1	GPUREG_TEXENV2_CONFIG1
00D2	GPUREG_TEXENV2_CONFIG2
00D3	GPUREG_TEXENV2_CONFIG3
00D4	GPUREG_TEXENV2_CONFIG4
00D5	GPUREG_00D5
00D6	GPUREG_00D6
00D7	GPUREG_00D7
00D8	GPUREG_TEXENV3_CONFIG0
00D9	GPUREG_TEXENV3_CONFIG1
00DA	GPUREG_TEXENV3_CONFIG2
00DB	GPUREG_TEXENV3_CONFIG3
00DC	GPUREG_TEXENV3_CONFIG4
00DD	GPUREG_00DD
00DE	GPUREG_00DE
00DF	GPUREG_00DF
00E0	GPUREG_00E0
00E1	GPUREG_00E1
00E2	GPUREG_00E2
00E3	GPUREG_00E3
00E4	GPUREG_00E4
00E5	GPUREG_00E5
00E6	GPUREG_00E6
00E7	GPUREG_00E7
00E8	GPUREG_00E8
00E9	GPUREG_00E9
00EA	GPUREG_00EA
00EB	GPUREG_00EB
00EC	GPUREG_00EC
00ED	GPUREG_00ED
00EE	GPUREG_00EE
00EF	GPUREG_00EF
00F0	GPUREG_TEXENV4_CONFIG0
00F1	GPUREG_TEXENV4_CONFIG1
00F2	GPUREG_TEXENV4_CONFIG2
00F3	GPUREG_TEXENV4_CONFIG3
00F4	GPUREG_TEXENV4_CONFIG4
00F5	GPUREG_00F5
00F6	GPUREG_00F6
00F7	GPUREG_00F7
00F8	GPUREG_TEXENV5_CONFIG0
00F9	GPUREG_TEXENV5_CONFIG1
00FA	GPUREG_TEXENV5_CONFIG2
00FB	GPUREG_TEXENV5_CONFIG3
00FC	GPUREG_TEXENV5_CONFIG4
00FD	GPUREG_00FD
00FE	GPUREG_00FE
00FF	GPUREG_00FF
0100	GPUREG_COLOROUTPUT_CONFIG	?
0101	GPUREG_BLEND_CONFIG
0102	GPUREG_COLORLOGICOP_CONFIG
0103	GPUREG_BLEND_COLOR
0104	GPUREG_ALPHATEST_CONFIG
0105	GPUREG_STENCILTEST_CONFIG
0106	GPUREG_STENCILOP_CONFIG
0107	GPUREG_DEPTHTEST_CONFIG
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_0110
0111	GPUREG_0111
0112	GPUREG_0112
0113	GPUREG_0113
0114	GPUREG_0114
0115	GPUREG_0115
0116	GPUREG_DEPTHBUFFER_FORMAT
0117	GPUREG_COLORBUFFER_FORMAT
0118	GPUREG_0118
0119	GPUREG_0119
011A	GPUREG_011A
011B	GPUREG_011B
011C	GPUREG_DEPTHBUFFER_LOC
011D	GPUREG_COLORBUFFER_LOC
011E	GPUREG_OUTBUFFER_DIM
011F	GPUREG_011F
0120	GPUREG_0120
0121	GPUREG_0121
0122	GPUREG_0122
0123	GPUREG_0123
0124	GPUREG_0124
0125	GPUREG_0125
0126	GPUREG_0126
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
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
0140	GPUREG_0140
0141	GPUREG_0141
0142	GPUREG_0142
0143	GPUREG_0143
0144	GPUREG_0144
0145	GPUREG_0145
0146	GPUREG_0146
0147	GPUREG_0147
0148	GPUREG_0148
0149	GPUREG_0149
014A	GPUREG_014A
014B	GPUREG_014B
014C	GPUREG_014C
014D	GPUREG_014D
014E	GPUREG_014E
014F	GPUREG_014F
0150	GPUREG_0150
0151	GPUREG_0151
0152	GPUREG_0152
0153	GPUREG_0153
0154	GPUREG_0154
0155	GPUREG_0155
0156	GPUREG_0156
0157	GPUREG_0157
0158	GPUREG_0158
0159	GPUREG_0159
015A	GPUREG_015A
015B	GPUREG_015B
015C	GPUREG_015C
015D	GPUREG_015D
015E	GPUREG_015E
015F	GPUREG_015F
0160	GPUREG_0160
0161	GPUREG_0161
0162	GPUREG_0162
0163	GPUREG_0163
0164	GPUREG_0164
0165	GPUREG_0165
0166	GPUREG_0166
0167	GPUREG_0167
0168	GPUREG_0168
0169	GPUREG_0169
016A	GPUREG_016A
016B	GPUREG_016B
016C	GPUREG_016C
016D	GPUREG_016D
016E	GPUREG_016E
016F	GPUREG_016F
0170	GPUREG_0170
0171	GPUREG_0171
0172	GPUREG_0172
0173	GPUREG_0173
0174	GPUREG_0174
0175	GPUREG_0175
0176	GPUREG_0176
0177	GPUREG_0177
0178	GPUREG_0178
0179	GPUREG_0179
017A	GPUREG_017A
017B	GPUREG_017B
017C	GPUREG_017C
017D	GPUREG_017D
017E	GPUREG_017E
017F	GPUREG_017F
0180	GPUREG_0180
0181	GPUREG_0181
0182	GPUREG_0182
0183	GPUREG_0183
0184	GPUREG_0184
0185	GPUREG_0185
0186	GPUREG_0186
0187	GPUREG_0187
0188	GPUREG_0188
0189	GPUREG_0189
018A	GPUREG_018A
018B	GPUREG_018B
018C	GPUREG_018C
018D	GPUREG_018D
018E	GPUREG_018E
018F	GPUREG_018F
0190	GPUREG_0190
0191	GPUREG_0191
0192	GPUREG_0192
0193	GPUREG_0193
0194	GPUREG_0194
0195	GPUREG_0195
0196	GPUREG_0196
0197	GPUREG_0197
0198	GPUREG_0198
0199	GPUREG_0199
019A	GPUREG_019A
019B	GPUREG_019B
019C	GPUREG_019C
019D	GPUREG_019D
019E	GPUREG_019E
019F	GPUREG_019F
01A0	GPUREG_01A0
01A1	GPUREG_01A1
01A2	GPUREG_01A2
01A3	GPUREG_01A3
01A4	GPUREG_01A4
01A5	GPUREG_01A5
01A6	GPUREG_01A6
01A7	GPUREG_01A7
01A8	GPUREG_01A8
01A9	GPUREG_01A9
01AA	GPUREG_01AA
01AB	GPUREG_01AB
01AC	GPUREG_01AC
01AD	GPUREG_01AD
01AE	GPUREG_01AE
01AF	GPUREG_01AF
01B0	GPUREG_01B0
01B1	GPUREG_01B1
01B2	GPUREG_01B2
01B3	GPUREG_01B3
01B4	GPUREG_01B4
01B5	GPUREG_01B5
01B6	GPUREG_01B6
01B7	GPUREG_01B7
01B8	GPUREG_01B8
01B9	GPUREG_01B9
01BA	GPUREG_01BA
01BB	GPUREG_01BB
01BC	GPUREG_01BC
01BD	GPUREG_01BD
01BE	GPUREG_01BE
01BF	GPUREG_01BF
01C0	GPUREG_01C0
01C1	GPUREG_01C1
01C2	GPUREG_01C2
01C3	GPUREG_01C3
01C4	GPUREG_01C4
01C5	GPUREG_01C5
01C6	GPUREG_01C6
01C7	GPUREG_01C7
01C8	GPUREG_01C8
01C9	GPUREG_01C9
01CA	GPUREG_01CA
01CB	GPUREG_01CB
01CC	GPUREG_01CC
01CD	GPUREG_01CD
01CE	GPUREG_01CE
01CF	GPUREG_01CF
01D0	GPUREG_01D0
01D1	GPUREG_01D1
01D2	GPUREG_01D2
01D3	GPUREG_01D3
01D4	GPUREG_01D4
01D5	GPUREG_01D5
01D6	GPUREG_01D6
01D7	GPUREG_01D7
01D8	GPUREG_01D8
01D9	GPUREG_01D9
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
0200	GPUREG_ATTRIBBUFFERS_LOC
0201	GPUREG_ATTRIBBUFFERS_FORMAT_LOW
0202	GPUREG_ATTRIBBUFFERS_FORMAT_HIGH
0203	GPUREG_ATTRIBBUFFER0_CONFIG0
0204	GPUREG_ATTRIBBUFFER0_CONFIG1
0205	GPUREG_ATTRIBBUFFER0_CONFIG2
0206	GPUREG_ATTRIBBUFFER1_CONFIG0
0207	GPUREG_ATTRIBBUFFER1_CONFIG1
0208	GPUREG_ATTRIBBUFFER1_CONFIG2
0209	GPUREG_ATTRIBBUFFER2_CONFIG0
020A	GPUREG_ATTRIBBUFFER2_CONFIG1
020B	GPUREG_ATTRIBBUFFER2_CONFIG2
020C	GPUREG_ATTRIBBUFFER3_CONFIG0
020D	GPUREG_ATTRIBBUFFER3_CONFIG1
020E	GPUREG_ATTRIBBUFFER3_CONFIG2
020F	GPUREG_ATTRIBBUFFER4_CONFIG0
0210	GPUREG_ATTRIBBUFFER4_CONFIG1
0211	GPUREG_ATTRIBBUFFER4_CONFIG2
0212	GPUREG_ATTRIBBUFFER5_CONFIG0
0213	GPUREG_ATTRIBBUFFER5_CONFIG1
0214	GPUREG_ATTRIBBUFFER5_CONFIG2
0215	GPUREG_ATTRIBBUFFER6_CONFIG0
0216	GPUREG_ATTRIBBUFFER6_CONFIG1
0217	GPUREG_ATTRIBBUFFER6_CONFIG2
0218	GPUREG_ATTRIBBUFFER7_CONFIG0
0219	GPUREG_ATTRIBBUFFER7_CONFIG1
021A	GPUREG_ATTRIBBUFFER7_CONFIG2
021B	GPUREG_ATTRIBBUFFER8_CONFIG0
021C	GPUREG_ATTRIBBUFFER8_CONFIG1
021D	GPUREG_ATTRIBBUFFER8_CONFIG2
021E	GPUREG_ATTRIBBUFFER9_CONFIG0
021F	GPUREG_ATTRIBBUFFER9_CONFIG1
0220	GPUREG_ATTRIBBUFFER9_CONFIG2
0221	GPUREG_ATTRIBBUFFERA_CONFIG0
0222	GPUREG_ATTRIBBUFFERA_CONFIG1
0223	GPUREG_ATTRIBBUFFERA_CONFIG2
0224	GPUREG_ATTRIBBUFFERB_CONFIG0
0225	GPUREG_ATTRIBBUFFERB_CONFIG1
0226	GPUREG_ATTRIBBUFFERB_CONFIG2
0227	GPUREG_INDEXBUFFER_CONFIG
0228	GPUREG_NUMVERTICES
0229	GPUREG_GEOSTAGE_CONFIG	?
022A	GPUREG_022A
022B	GPUREG_022B
022C	GPUREG_022C
022D	GPUREG_022D
022E	GPUREG_DRAWARRAYS
022F	GPUREG_DRAWELEMENTS
0230	GPUREG_0230
0231	GPUREG_0231
0232	GPUREG_0232
0233	GPUREG_0233
0234	GPUREG_0234
0235	GPUREG_0235
0236	GPUREG_0236
0237	GPUREG_0237
0238	GPUREG_0238
0239	GPUREG_0239
023A	GPUREG_023A
023B	GPUREG_023B
023C	GPUREG_023C
023D	GPUREG_023D
023E	GPUREG_023E
023F	GPUREG_023F
0240	GPUREG_0240
0241	GPUREG_0241
0242	GPUREG_0242
0243	GPUREG_0243
0244	GPUREG_0244
0245	GPUREG_0245
0246	GPUREG_0246
0247	GPUREG_0247
0248	GPUREG_0248
0249	GPUREG_0249
024A	GPUREG_024A
024B	GPUREG_024B
024C	GPUREG_024C
024D	GPUREG_024D
024E	GPUREG_024E
024F	GPUREG_024F
0250	GPUREG_0250
0251	GPUREG_0251
0252	GPUREG_0252
0253	GPUREG_0253
0254	GPUREG_0254
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	?
025F	GPUREG_025F
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
Geometry shader registers
0280	GPUREG_GSH_BOOLUNIFORM
0281	GPUREG_GSH_INTUNIFORM_I0
0282	GPUREG_GSH_INTUNIFORM_I1
0283	GPUREG_GSH_INTUNIFORM_I2
0284	GPUREG_GSH_INTUNIFORM_I3
0285	GPUREG_0285
0286	GPUREG_0286
0287	GPUREG_0287
0288	GPUREG_0288
0289	GPUREG_GSH_INPUTBUFFER_CONFIG
028A	GPUREG_GSH_ENTRYPOINT
028B	GPUREG_GSH_ATTRIBUTES_PERMUTATION_LOW
028C	GPUREG_GSH_ATTRIBUTES_PERMUTATION_HIGH
028D	GPUREG_GSH_OUTMAP_MASK
028E	GPUREG_028E
028F	GPUREG_028F
0290	GPUREG_GSH_FLOATUNIFORM_CONFIG
0291	GPUREG_GSH_FLOATUNIFORM_DATA
0292	GPUREG_GSH_FLOATUNIFORM_DATA
0293	GPUREG_GSH_FLOATUNIFORM_DATA
0294	GPUREG_GSH_FLOATUNIFORM_DATA
0295	GPUREG_GSH_FLOATUNIFORM_DATA
0296	GPUREG_GSH_FLOATUNIFORM_DATA
0297	GPUREG_GSH_FLOATUNIFORM_DATA
0298	GPUREG_GSH_FLOATUNIFORM_DATA
0299	GPUREG_0299
029A	GPUREG_029A
029B	GPUREG_GSH_CODE_CONFIG	?
029C	GPUREG_GSH_CODE_DATA
029D	GPUREG_029D
029E	GPUREG_029E
029F	GPUREG_029F
02A0	GPUREG_02A0
02A1	GPUREG_02A1
02A2	GPUREG_02A2
02A3	GPUREG_02A3
02A4	GPUREG_02A4
02A5	GPUREG_GSH_OPDESCS_CONFIG
02A6	GPUREG_GSH_OPDESCS_DATA
02A7	GPUREG_02A7
02A8	GPUREG_02A8
02A9	GPUREG_02A9
02AA	GPUREG_02AA
02AB	GPUREG_02AB
02AC	GPUREG_02AC
02AD	GPUREG_02AD
02AE	GPUREG_02AE
02AF	GPUREG_02AF
Vertex shader registers
02B0	GPUREG_VSH_BOOLUNIFORM
02B1	GPUREG_VSH_INTUNIFORM_I0
02B2	GPUREG_VSH_INTUNIFORM_I1
02B3	GPUREG_VSH_INTUNIFORM_I2
02B4	GPUREG_VSH_INTUNIFORM_I3
02B5	GPUREG_02B5
02B6	GPUREG_02B6
02B7	GPUREG_02B7
02B8	GPUREG_02B8
02B9	GPUREG_VSH_INPUTBUFFER_CONFIG
02BA	GPUREG_VSH_ENTRYPOINT
02BB	GPUREG_VSH_ATTRIBUTES_PERMUTATION_LOW
02BC	GPUREG_VSH_ATTRIBUTES_PERMUTATION_HIGH
02BD	GPUREG_VSH_OUTMAP_MASK
02BE	GPUREG_02BE
02BF	GPUREG_02BF
02C0	GPUREG_VSH_FLOATUNIFORM_CONFIG
02C1	GPUREG_VSH_FLOATUNIFORM_DATA
02C2	GPUREG_VSH_FLOATUNIFORM_DATA
02C3	GPUREG_VSH_FLOATUNIFORM_DATA
02C4	GPUREG_VSH_FLOATUNIFORM_DATA
02C5	GPUREG_VSH_FLOATUNIFORM_DATA
02C6	GPUREG_VSH_FLOATUNIFORM_DATA
02C7	GPUREG_VSH_FLOATUNIFORM_DATA
02C8	GPUREG_VSH_FLOATUNIFORM_DATA
02C9	GPUREG_02C9
02CA	GPUREG_02CA
02CB	GPUREG_VSH_CODE_CONFIG	?
02CC	GPUREG_VSH_CODE_DATA
02CD	GPUREG_02CD
02CE	GPUREG_02CE
02CF	GPUREG_02CF
02D0	GPUREG_02D0
02D1	GPUREG_02D1
02D2	GPUREG_02D2
02D3	GPUREG_02D3
02D4	GPUREG_02D4
02D5	GPUREG_VSH_OPDESCS_CONFIG	?
02D6	GPUREG_VSH_OPDESCS_DATA
Unknown registers
02D7	GPUREG_02D7
02D8	GPUREG_02D8
02D9	GPUREG_02D9
02DA	GPUREG_02DA
02DB	GPUREG_02DB
02DC	GPUREG_02DC
02DD	GPUREG_02DD
02DE	GPUREG_02DE
02DF	GPUREG_02DF
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

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.

GPUREG_GEOSTAGE_CONFIG

Bits	Description
0-7	Geometry stage mode. (0=Vertex shader only, 2=Vertex shader + geometry shader)
0-7	Unknown. Often set to 1.
0-7	Unknown.
0-7	Unknown. Often set to 0.

This register configures the geometry stage of the GPU pipeline.

Geometry shader registers

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.

Vertex shader registers

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.