status 0x000(0) 31:0 Chuck R Yes / n/a Voodoo2 Graphics Status intrCtrl 0x004(4) 31:0 Chuck R/W Yes / No Interrupt Status and Control vertexAx 0x008(8) 15:0 Chuck+Bruce% W Yes / Yes Vertex A x-coordinate location (12.4 format) vertexAy 0x00c(12) 15:0 Chuck+Bruce% W Yes / Yes Vertex A y-coordinate location (12.4 format) vertexBx 0x010(16) 15:0 Chuck+Bruce% W Yes / Yes Vertex B x-coordinate location (12.4 format) vertexBy 0x014(20) 15:0 Chuck+Bruce% W Yes / Yes Vertex B y-coordinate location (12.4 format) vertexCx 0x018(24) 15:0 Chuck+Bruce% W Yes / Yes Vertex C x-coordinate location (12.4 format) vertexCy 0x01c(28) 15:0 Chuck+Bruce% W Yes / Yes Vertex C y-coordinate location (12.4 format) startR 0x020(32) 23:0 Chuck W Yes / Yes Starting Red parameter (12.12 format) startG 0x024(36) 23:0 Chuck W Yes / Yes Starting Green parameter (12.12 format) startB 0x028(40) 23:0 Chuck W Yes / Yes Starting Blue parameter (12.12 format) startZ 0x02c(44) 31:0 Chuck W Yes / Yes Starting Z parameter (20.12 format) startA 0x030(48) 23:0 Chuck W Yes / Yes Starting Alpha parameter (12.12 format) startS 0x034(52) 31:0 Bruce* W Yes / Yes Starting S/W parameter (14.18 format) startT 0x038(56) 31:0 Bruce* W Yes / Yes Starting T/W parameter (14.18 format) startW 0x03c(60) 31:0 Chuck+Bruce* W Yes / Yes Starting 1/W parameter (2.30 format) dRdX 0x040(64) 23:0 Chuck W Yes / Yes Change in Red with respect to X (12.12 format) dGdX 0x044(68) 23:0 Chuck W Yes / Yes Change in Green with respect to X (12.12 format) dBdX 0x048(72) 23:0 Chuck W Yes / Yes Change in Blue with respect to X (12.12 format) dZdX 0x04c(76) 31:0 Chuck W Yes / Yes Change in Z with respect to X (20.12 format) dAdX 0x050(80) 23:0 Chuck W Yes / Yes Change in Alpha with respect to X (12.12 format) dSdX 0x054(84) 31:0 Bruce* W Yes / Yes Change in S/W with respect to X (14.18 format) dTdX 0x058(88) 31:0 Bruce* W Yes / Yes Change in T/W with respect to X (14.18 format) dWdX 0x05c(92) 31:0 Chuck+Bruce* W Yes / Yes Change in 1/W with respect to X (2.30 format) dRdY 0x060(96) 23:0 Chuck W Yes / Yes Change in Red with respect to Y (12.12 format) dGdY 0x064(100) 23:0 Chuck W Yes / Yes Change in Green with respect to Y (12.12 format) dBdY 0x068(104) 23:0 Chuck W Yes / Yes Change in Blue with respect to Y (12.12 format) dZdY 0x06c(108) 31:0 Chuck W Yes / Yes Change in Z with respect to Y (20.12 format) dAdY 0x070(112) 23:0 Chuck W Yes / Yes Change in Alpha with respect to Y (12.12 format) dSdY 0x074(116) 31:0 Bruce* W Yes / Yes Change in S/W with respect to Y (14.18 format) dTdY 0x078(120) 31:0 Bruce* W Yes / Yes Change in T/W with respect to Y (14.18 format) dWdY 0x07c(124) 31:0 Chuck+Bruce* W Yes / Yes Change in 1/W with respect to Y (2.30 format) triangleCMD 0x080(128) 31 Chuck+Bruce% W Yes / Yes Execute TRIANGLE command (floating point) reserved 0x084(132) n/a n/a W n/a fvertexAx 0x088(136) 31:0 Chuck+Bruce% W Yes / Yes Vertex A x-coordinate location (floating point) fvertexAy 0x08c(140) 31:0 Chuck+Bruce% W Yes / Yes Vertex A y-coordinate location (floating point) fvertexBx 0x090(144) 31:0 Chuck+Bruce% W Yes / Yes Vertex B x-coordinate location (floating point) fvertexBy 0x094(148) 31:0 Chuck+Bruce% W Yes / Yes Vertex B y-coordinate location (floating point) fvertexCx 0x098(152) 31:0 Chuck+Bruce% W Yes / Yes Vertex C x-coordinate location (floating point) fvertexCy 0x09c(156) 31:0 Chuck+Bruce% W Yes / Yes Vertex C y-coordinate location (floating point) fstartR 0x0a0(160) 31:0 Chuck W Yes / Yes Starting Red parameter (floating point) fstartG 0x0a4(164) 31:0 Chuck W Yes / Yes Starting Green parameter (floating point) fstartB 0x0a8(168) 31:0 Chuck W Yes / Yes Starting Blue parameter (floating point) fstartZ 0x0ac(172) 31:0 Chuck W Yes / Yes Starting Z parameter (floating point) fstartA 0x0b0(176) 31:0 Chuck W Yes / Yes Starting Alpha parameter (floating point) fstartS 0x0b4(180) 31:0 Bruce* W Yes / Yes Starting S/W parameter (floating point) fstartT 0x0b8(184) 31:0 Bruce* W Yes / Yes Starting T/W parameter (floating point) fstartW 0x0bc(188) 31:0 Chuck+Bruce* W Yes / Yes Starting 1/W parameter (floating point) fdRdX 0x0c0(192) 31:0 Chuck W Yes / Yes Change in Red with respect to X (floating point) fdGdX 0x0c4(196) 31:0 Chuck W Yes / Yes Change in Green with respect to X (floating point) fdBdX 0x0c8(200) 31:0 Chuck W Yes / Yes Change in Blue with respect to X (floating point) fdZdX 0x0cc(204) 31:0 Chuck W Yes / Yes Change in Z with respect to X (floating point) fdAdX 0x0d0(208) 31:0 Chuck W Yes / Yes Change in Alpha with respect to X (floating point) fdSdX 0x0d4(212) 31:0 Bruce* W Yes / Yes Change in S/W with respect to X (floating point) fdTdX 0x0d8(216) 31:0 Bruce* W Yes / Yes Change in T/W with respect to X (floating point) fdWdX 0x0dc(220) 31:0 Chuck+Bruce* W Yes / Yes Change in 1/W with respect to X (floating point) fdRdY 0x0e0(224) 31:0 Chuck W Yes / Yes Change in Red with respect to Y (floating point) fdGdY 0x0e4(228) 31:0 Chuck W Yes / Yes Change in Green with respect to Y (floating point) fdBdY 0x0e8(232) 31:0 Chuck W Yes / Yes Change in Blue with respect to Y (floating point) fdZdY 0x0ec(236) 31:0 Chuck W Yes / Yes Change in Z with respect to Y (floating point) fdAdY 0x0f0(240) 31:0 Chuck W Yes / Yes Change in Alpha with respect to Y (floating point) fdSdY 0x0f4(244) 31:0 Bruce* W Yes / Yes Change in S/W with respect to Y (floating point) fdTdY 0x0f8(248) 31:0 Bruce* W Yes / Yes Change in T/W with respect to Y (floating point) fdWdY 0x0fc(252) 31:0 Chuck+Bruce* W Yes / Yes Change in 1/W with respect to Y (floating point) ftriangleCMD 0x100(256) 31 Chuck+Bruce% W Yes / Yes Execute TRIANGLE command (floating point) fbzColorPath 0x104(260) 29:0 Chuck+Bruce% R/W Yes / Yes Chuck Color Path Control fogMode 0x108(264) 7:0 Chuck R/W Yes / Yes Fog Mode Control alphaMode 0x10c(268) 31:0 Chuck R/W Yes / Yes Alpha Mode Control fbzMode 0x110(272) 21:0 Chuck R/W No / Yes RGB Buffer and Depth-Buffer Control lfbMode 0x114(276) 16:0 Chuck R/W No / Yes Linear Frame Buffer Mode Control clipLeftRight 0x118(280) 31:0 Chuck R/W No / Yes Left and Right of Clipping Register clipLowYHighY 0x11c(284) 31:0 Chuck R/W No / Yes Top and Bottom of Clipping Register nopCMD 0x120(288) 1:0 Chuck+Bruce% W No / Yes Execute NOP command fastfillCMD 0x124(292) n/a Chuck W No / Yes Execute FASTFILL command swapbufferCMD 0x128(296) 9:0 Chuck W No / Yes Execute SWAPBUFFER command fogColor 0x12c(300) 23:0 Chuck W No / Yes Fog Color Value zaColor 0x130(304) 31:0 Chuck W No / Yes Constant Alpha/Depth Value chromaKey 0x134(308) 23:0 Chuck+Bruce* W No / Yes Chroma Key Compare Value chromaRange 0x138(312) 27:0 Chuck+Bruce* W No / Yes Chroma Range Compare Values,modes,enable userIntrCMD 0x13c(316) 9:0 Chuck W No / Yes Execute USERINTERRUPT command stipple 0x140(320) 31:0 Chuck R/W No / Yes Rendering Stipple Value color0 0x144(324) 31:0 Chuck R/W No / Yes Constant Color #0 color1 0x148(328) 31:0 Chuck R/W No / Yes Constant Color #1 fbiPixelsIn 0x14c(332) 23:0 Chuck R n/a Pixel Counter (Number pixels processed) fbiChromaFail 0x150(336) 23:0 Chuck R n/a Pixel Counter (Number pixels failed Chroma test) fbiZfuncFail 0x154(340) 23:0 Chuck R n/a Pixel Counter (Number pixels failed Z test) fbiAfuncFail 0x158(344) 23:0 Chuck R n/a Pixel Counter (Number pixels failed Alpha test) fbiPixelsOut 0x15c(348) 23:0 Chuck R n/a Pixel Counter (Number pixels drawn) fogTable 0x160(352) to 0x1dc(476) 31:0 Chuck W No / Yes Fog Table cmdFifoBaseAddr 0x1e0(480) 25:0 Chuck R/W (n/a) / No CMDFIFO base address and size cmdFifoBump 0x1e4(484) 15:0 Chuck R/W (n/a) / No CMDFIFO bump depth cmdFifoRdPtr 0x1e8(488) 31:0 Chuck R/W (n/a) / No CMDFIFO current read pointer cmdFifoAMin 0x1ec(492) 31:0 Chuck R/W (n/a) / No CMDFIFO current minimum address cmdFifoAMax 0x1f0(496) 31:0 Chuck R/W (n/a) / No CMDFIFO current maximum address cmdFifoDepth 0x1f4(500) 15:0 Chuck R/W (n/a) / No CMDFIFO current depth cmdFifoHoles 0x1f8(504) 15:0 Chuck R/W (n/a) / No CMDFIFO number of holes reserved 0x1fc(508) n/a n/a n/a n/a fbiInit4 0x200(512) 12:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 4) vRetrace 0x204(516) 12:0 Chuck R (n/a) / No Vertical Retrace Counter backPorch 0x208(520) 24:0 Chuck R/W (n/a) / No Video Backporch Timing Generator videoDimensions 0x20c(524) 26:0 Chuck R/W (n/a) / No Video Screen Dimensions fbiInit0 0x210(528) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 0) fbiInit1 0x214(532) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 1) fbiInit2 0x218(536) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 2) fbiInit3 0x21c(540) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 3) hSync 0x220(544) 26:0 Chuck W (n/a) / No Horizontal Sync Timing Generator vSync 0x224(548) 28:0 Chuck W (n/a) / No Vertical Sync Timing Generator clutData 0x228(552) 29:0 Chuck W No / Yes Video Color Lookup Table Initialization dacData 0x22c(556) 13:0 Chuck W (n/a) / No External DAC Initialization maxRgbDelta 0x230(560) 23:0 Chuck W (n/a) / No Max. RGB difference for Video Filtering hBorder 0x234(564) 24:0 Chuck W (n/a) / No Horizontal Border Color Control vBorder 0x238(568) 24:0 Chuck W (n/a) / No Vertical Border Color Control borderColor 0x23c(572) 23:0 Chuck W (n/a) / No Video Border Color hvRetrace 0x240(576) 26:0 Chuck R (n/a) / No Horizontal and Vertical Retrace Counters (synced) fbiInit5 0x244(580) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 5) fbiInit6 0x248(584) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 6) fbiInit7 0x24c(588) 31:0 Chuck R/W (n/a) / No Chuck Hardware Initialization (register 7) reserved 0x250(592) n/a n/a n/a n/a reserved 0x254(596) n/a n/a n/a n/a fbiSwapHistory 0x258(600) 31:0 Chuck R n/a Swap History Register fbiTrianglesOut 0x25c(604) 23:0 Chuck R n/a Triangle Counter (Number triangles drawn) sSetupMode 0x260(608) 19:0 Chuck W Yes / Yes Triangle setup mode sVx 0x264(612) 31:0 Chuck+Bruce* W Yes / Yes Triangle setup X (floating point) sVy 0x268(616) 31:0 Chuck+Bruce* W Yes / Yes Triangle setup Y (floating point) sARGB 0x26c(620) 31:0 Chuck+Bruce* W Yes / Yes Triangle setup Alpha, Red, Green, Blue sRed 0x270(624) 31:0 Chuck W Yes / Yes Triangle setup Red value (floating point) sGreen 0x274(628) 31:0 Chuck W Yes / Yes Triangle setup Green value (floating point) sBlue 0x278(632) 31:0 Chuck W Yes / Yes Triangle setup Blue value (floating point) sAlpha 0x27c(636) 31:0 Chuck W Yes / Yes Triangle setup Alpha value (floating point) sVz 0x280(640) 31:0 Chuck W Yes / Yes Triangle setup Z (floating point) sWb 0x284(644) 31:0 Chuck+Bruce* W Yes / Yes Triangle setup Global W (floating point) sWtmu0 0x288(648) 31:0 Bruce* W Yes / Yes Triangle setup Tmu0 & Tmu1 W (floating point) sS/W0 0x28c(652) 31:0 Bruce* W Yes / Yes Triangle setup Tmu0 & Tmu1 S/W (floating point) sT/W0 0x290(656) 31:0 Bruce* W Yes / Yes Triangle setup Tmu0 & Tmu1 T/W (floating point) sWtmu1 0x294(660) 31:0 Bruce-1 W Yes / Yes Triangle setup Tmu1 only W (floating point) sS/Wtmu1 0x298(664) 31:0 Bruce-1 W Yes / Yes Triangle setup Tmu1 only S/W (floating point) sT/Wtmu1 0x29c(668) 31:0 Bruce-1 W Yes / Yes Triangle setup Tmu1 only T/W (floating point) sDrawTriCMD 0x2a0(672) 31:0 Chuck+Bruce* W Yes / Yes Triangle setup (Draw) sBeginTriCMD 0x2a4(676) 31:0 Chuck W Yes / Yes Triangle setup Start New triangle reserved 0x2a8(680) n/a n/a n/a n/a reserved 0x2ac(684) n/a n/a n/a n/a reserved 0x2b0(688) n/a n/a n/a n/a reserved 0x2b4(692) n/a n/a n/a n/a reserved 0x2b8(696) n/a n/a n/a n/a reserved 0x2bc(700) n/a n/a n/a n/a bltSrcBaseAddr 0x2c0(704) 21:0 Chuck R/W Yes / Yes BitBLT Source base address bltDstBaseAddr 0x2c4(708) 21:0 Chuck R/W Yes / Yes BitBLT Destination base address bltXYStrides 0x2c8(712) 27:0 Chuck R/W Yes / Yes BitBLT Source and Destination strides bltSrcChromaRange 0x2cc(716) 31:0 Chuck R/W Yes / Yes BiBLT Source Chroma key range bltDstChromaRange 0x2d0(720) 31:0 Chuck R/W Yes / Yes BitBLT Destination Chroma key range bltClipX 0x2d4(724) 27:0 Chuck R/W Yes / Yes BitBLT Min/Max X clip values bltClipY 0x2d8(728) 27:0 Chuck R/W Yes / Yes BitBLT Min/Max Y clip values reserved 0x2dc(732) bltSrcXY 0x2e0(736) 26:0 Chuck R/W Yes / Yes BitBLT Source starting XY coordinates bltDstXY 0x2e4(740) 31:0 Chuck R/W Yes / Yes BitBLT Destination starting XY coordinates bltSize 0x2e8(744) 31:0 Chuck R/W Yes / Yes BitBLT width and height bltRop 0x2ec(748) 15:0 Chuck R/W Yes / Yes BitBLT Raster operations bltColor 0x2f0(752) 31:0 Chuck R/W Yes / Yes BitBLT and foreground background colors reserved 0x2f4(756) bltCommand 0x2f8(760) 31:0 Chuck R/W Yes / Yes BitBLT command mode bltData 0x2fc(764) 31:0 Chuck W Yes / Yes BitBLT data for CPU-to-Screen BitBLTs textureMode 0x300(768) 30:0 Bruce* W Yes / Yes Texture Mode Control tLOD 0x304(772) 27:0 Bruce* W Yes / Yes Texture LOD Settings tDetail 0x308(776) 21:0 Bruce* W Yes / Yes Texture LOD Settings texBaseAddr 0x30c(780) 18:0 Bruce* W Yes / Yes Texture Base Address texBaseAddr_1 0x310(784) 18:0 Bruce* W Yes / Yes Texture Base Address (supplemental LOD 1) texBaseAddr_2 0x314(788) 18:0 Bruce* W Yes / Yes Texture Base Address (supplemental LOD 2) texBaseAddr_3_8 0x318(792) 18:0 Bruce* W Yes / Yes Texture Base Address (supplemental LOD 3-8) trexInit0 0x31c(796) 31:0 Bruce* W No / Yes Bruce Hardware Initialization (register 0) trexInit1 0x320(800) 31:0 Bruce* W No / Yes Bruce Hardware Initialization (register 1) nccTable0 0x324(804) to 0x350(848) 31:0 Bruce* W No / Yes Narrow Channel Compression Table 0 (12 entries) nccTable1 0x354(852) to 0x380(896) 31:0 Bruce* W No / Yes Narrow Channel Compression Table 1 (12 entries) reserved 0x384(900) to 0x3fc(1020) n/a n/a n/a n/a