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the (217), and (68), raster (45), #memory (39), #infinitereality (38), board (35), graphics (33), geometry (32), was (31), with (28), manager (25), for (23), pipeline (22), which (22), four (22), each (22), engine (21), are (20), texture (19), two (19), used (19), edit (17), performance (17), boards (17), image (16), asic (16), per (16), silicon (16), has (16), that (16), display (15), onyx (15), onyx2 (14), one (14), bit (14), second (14), hardware (12), reality (12), system (11), infinitereality2 (11), interface (11), this (10), anti (10), pixels (10), dg5 (10), million (10), data (10), video (9), processor (9), pixel (9), stage (9), generator (9), host (9), bus (9), wikipedia (8), from (8), unit (8), architecture (8), aliased (8), infinitereality3 (8), outputs (8), multiple (8), texel (7), bandwidth (7), xio (7), 3000 (7), 2000 (7), buffered (7), textured (7), infinitereality4 (7), 256 (7), ge14 (7), introduced (7), based (7), pipelines (7), also (7), can (7), depth (7), multi (7), 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s two methods of operation the first method requires a digital multiplexer dplex daughterboard to be installed in every pipeline which combines the output of multiple pipelines the second method uses monstermode software to distribute the data used to render a frame to multiple pipelines to interface the pipeline to the system a flat cable interface fci cable is used to connect the host interface processor asic on the geometry board to the ibus on the io4 board a part of the host system geometry board edit the geometry board is responsible for geometry and image processing and is divided into four stages each stage being implemented by separate device s the first stage is the host interface due to the infinitereality being designed for two very different platforms the traditional shared memory bus based onyx using the powerpath 2 bus and the distributed shared memory network based onyx2 using the numalink2 interconnect the infinitereality had to have an interface that could provide similar performance on both platforms which had a large difference in incoming bandwidth 200 mb s versus 400 mb s respectively 1 to this end a host interface processor an embedded risc core is used to fetch display list objects using direct memory access dma the host interface processor is accompanied by 16 mb of synchronous dynamic random access memory sdram of which 15 mb is used to cache display leaf objects the cache can deliver data to the next stage at over 300 mb s the next stage is the geometry distributor which transfers data and instructions from the host interface processor to individual geometry engines the next stage is performing geometry and image processing the geometry engine is used for the purpose with each geometry board containing up to four working in a multiple instruction multiple data mimd fashion the geometry engine is a semi custom asic with a single instruction multiple data simd pipeline containing three floating point cores each containing an arithmetic logic unit alu a multiplier and a 32 bit by 32 entry register file with two read and two write ports these cores are provided with a 32 bit by 2 560 entry memory that holds elements of opengl state and provides scratchpad storage each core also has a float to fix converter to convert floating point values into integer form the geometry engine is capable of completing three instructions per cycle and each geometry board with four such devices can complete 12 instructions per cycle the geometry engine uses a 195 bit microinstruction which is compressed in order to reduce size and bandwidth usage in return for slightly less performance the geometry engine processor operates at 90 mhz achieving a maximum theoretical performance of 540 mflops 2 as there are four such processors on a ge12 4 or ge14 4 board the maximum theoretical performance is 2 16 gflops a 16 pipeline system therefore achieves a maximum theoretical performance of 34 56 gflops the fourth stage is the geometry raster fifo a first in first out fifo buffer that merges the outputs of the four geometry engines into one reassembling the outputs in the order they were issued the fifo is built from sdram and has a capacity of 4 mb 3 large enough to store 65 536 vertexes the transformed vertexes are moved from this fifo to the raster manager boards for triangle reassembly and setup by the triangle bus also known as the vertex bus which has a bandwidth of 400 mb s raster memory board edit the function of the raster memory board is to perform rasterization it also contains the texture memory and raster memory which is more commonly known as the framebuffer rasterization is performed in the fragment generator and the eighty image engines the fragment generator comprises four asic designs the scan converter sc asic the texel address calculator ta asic the texture memory controller tm asic and the texture fragment tf asic 1 the sc asic and the ta asic perform scan conversion color and depth interpolation perspective correct texture coordinate interpolation and level of detail computation on incoming data and the results are passed to the eight tm asics which are specialized memory controllers optimized for texel access each tm asic controls four sdrams that make up one eighth of the texture memory the sdrams used are 16 bits wide and have separate address and data buses sdrams with a capacity of 4 mb are used by raster manager boards with 16 mb of texture memory while 16 mb sdrams are used by raster manager boards with 64 mb of texture memory 2 the tm asics perform texel lookups in their sdrams according to the texel addresses issued by the ta asic texels from the tm asics are forwarded to the appropriate tf asic where texture filtering texture environment combination with interpolated color and fog application is performed as each sdram holds part of the texture memory all of the 32 sdrams must be connected to all of the 80 image engines to achieve this the tm and tf asics implement a two rank omega network which reduces the number of individual paths required for the 32 to 80 sort while maintaining the same functionality the eighty image engines have multiple functions firstly each image engine controls a portion of the raster memory which in the case of the infinitereality is a 1 mb sgram organized as 262 144 by 32 bit words 1 2 secondly the following opengl per fragment operations are performed by the image engines pixel ownership test stencil test depth buffer test blending dithering and logical operation lastly the image engines perform anti aliasing and accumulation buffer operations to deliver pixel data for display each image engine has a 2 bit serial bus to the display generator board if one raster manager board is present in the pipeline the image engine uses the entire width of the bus whereas if two or more raster manager boards are present the image engine uses half the bus 1 each serial bus is actually a part of the video bus which has a bandwidth of 1 2 gb s four image engine cores are contained on an image engine asic which contains nearly 488 000 logic gates comprising 1 95 million transistors on a 42 mm 2 6 5 by 6 5 mm die that was fabricated in a 0 35 micrometre process by vlsi technology the infinitereality uses the rm6 16 or rm6 64 raster managers each pipeline is capable of display resolutions of 2 62 5 24 or 10 48 million pixels provided that one two or four raster manager boards respectively are present 4 the raster memory can be configured to use 256 512 or 1024 bits per pixel 320 mb supports a resolution of 2560 by 2048 pixels with each pixel containing 512 bits of information 2 in a configuration with four raster managers the texture memory has a bandwidth of 15 36 gb s and the raster memory has a bandwidth of 72 8 gb s display generator board edit the dg4 2 display generator board contains hardware to drive up to two video outputs which may be expanded to eight video outputs with an optional daughterboard a configuration known as the dg4 8 the outputs are independent and each output has hardware for generating video timing video resizing gamma correction genlock and digital to analog conversion digital to analog conversion is provided by 8 bit digital to analog converters that support a pixel clock frequency up to 220 mhz data for the video outputs are provided by four asics that de serialize and de interleave the 160 bit streams into 10 bit component rgba 12 bit component rbga l16 stereo field sequential fs or color indexes the hardware also incorporates the cursor at this stage a 32 768 entry color index map is available capabilities and performance edit the infinitereality was capable of several advanced capabilities 8 by 8 multi sampled anti aliasing 5 a maximum color depth of 48 bit rgba 5 16 overlay planes 5 a 24 bit floating point z buffer 5 each pixel consists of 256 to 1 048 bits of data stereo viewing was supported and was quad buffered the infinitereality s performance was 11 million non lighted depth buffered anti aliased triangle strips 40 pixels each per second 8 3 million textured depth buffered anti aliased triangle strips 50 pixels each per second 7 million lighted textured and anti aliased triangles per second 800 million trilinear mip mapped textured 16 bit texel depth buffered pixels per second 750 million trilinear mip mapped textured 16 bit texel four by four sub sample anti aliased depth buffered pixels per second 710 million textured and anti aliased pixels per second 300 million displayed pixels per second distributed over one to eight outputs infinitereality2 edit infinitereality2 is how hinv an irix utility that lists the hardware present in a system refers to an infinitereality that is used in the onyx2 the infinitereality2 however was still marketed as the infinitereality it was the second implementation of the infinitereality architecture and was introduced in late 1996 it is identical to the infinitereality architecturally but differs mechanically as the onyx2 s origin 2000 based card cage is different from the onyx s challenge based card cage introduced by the infinitereality2 is an interface scheme that is used in rackmount onyx2 or later systems instead of being connected to the host system via a fci cable the board set is plugged into the rear of a midplane which can support two pipelines the midplane has eleven slots slot six to slot eleven are for the first pipeline which may contain one to four raster manager boards slot one to four is for the second pipeline which may contain one or two raster manager boards due to the number of slots there are because of this maximally configured onyx systems use one midplane for each pipeline to avoid restricting half of the 16 pipelines to a maximum of two raster manager boards slot five contains a ktown board if the midplane is used in an origin 2000 based system onyx2 or a ktown2 board if the midplane is used in an origin 3000 based system onyx 3000 the purpose of these boards is to interface the host system s xio link to the host interface processor asic on the geometry board these boards have two xio ports for this purpose with the top xio port connected to the right pipeline and the bottom xio port connected to the left pipeline reality edit the reality is a cost reduced version of the infinitereality2 intended to provide similar performance instead of using the ge14 4 geometry engine board and the rm7 16 or rm7 64 raster manager boards the reality used the ge14 2 geometry engine board and the rm8 16 or rm8 64 raster manager boards the ge14 2 has two geometry engine processors instead of four like the other models the rm8 16 and rm864 has 16 or 64 mb of texture memory respectively and 40 mb of raster memory the reality was also limited by the number of raster manager boards it could support one or two when maximally configured with two rm8 64 raster manager boards the reality pipeline has 80 mb of raster memory infinitereality2e edit the infinitereality2e was an upgrade of the infinitereality marketed as the infinitereality2 introduced in 1998 it succeeded the infinitereality board set and was itself succeeded by the infinitereality3 in 2000 but was not discontinued until 10 april 2001 it improves upon the infinitereality by replacing the ge14 4 geometry engine board with the ge16 4 geometry engine board and the rm7 16 or rm7 64 raster manager boards with the rm9 64 raster manager board the new geometry engine board operated at 112 mhz 6 improving geometry and image processing performance the new raster manager board operated at 72 mhz 6 improving anti aliased pixel fill performance infinitereality3 edit infinitereality3 was introduced in 2000 along with the onyx 3000 to supersede the infinitereality2 it was used in the onyx2 and onyx 3000 visualization systems the only improvement over the previous implementation was replacement of the rm9 64 raster manager with the rm10 256 raster manager which has 256 mb of texture memory four times that of the previous raster manager when maximally configured with four raster managers the infinitereality3 pipeline provides 320 mb of raster memory infinitereality4 edit infinitereality4 was introduced in 2002 to succeed the infinitereality3 it was used in the onyx2 onyx 3000 and onyx 350 it is the last member of the infinitereality family itself succeeded by the ati firegl based ultimatevision which was used in the onyx4 the only improvement over the previous implementation was the replacement of the rm10 256 raster manager by the rm11 1024 raster manager which has improved performance 1 gb of texture memory and 2 5 gb of raster memory four and thirty two times that of the previous raster manager respectively when maximally configured with four raster managers the infinitereality4 pipeline has 10 gb of raster memory in a maximum configuration with 16 pipelines the infinitereality4 contained 16 gb of texture memory and 160 gb of raster memory 7 comparison edit the figures presented in the tables are for a minimal 1 pipeline and a maximal 16 pipeline configuration except for the reality which was restricted to single pipe operation hardware edit model geometry engine board raster manager board display generator board texture memory mb raster memory mb introduced discontinued reality ge14 2 rm8 16 or rm8 64 dg5 2 or dg5 8 64 40 to 80 1999 01 01 1999 06 31 infinitereality ge12 4 rm6 16 or rm6 64 dg4 2 or dg4 8 16 to 1 024 8 80 to 5 120 8 1996 01 01 1999 03 31 infinitereality2 ge14 4 rm7 16 or rm7 64 dg5 2 or dg5 8 16 to 1 024 80 to 5 120 1996 01 26 1999 09 30 infinitereality2e ge16 4 rm9 64 dg5 2 or dg5 8 64 to 1 024 8 80 to 5 120 8 2001 01 16 2003 06 27 infinitereality3 ge16 4 rm10 256 dg5 2 or dg5 8 256 to 4 096 7 80 to 5 120 7 2000 01 01 2003 06 27 infinitereality4 ge16 4 rm11 1024 dg5 2 or dg5 8 1 024 to 16 384 7 2 560 to 163 840 7 2000 01 01 2003 06 27 infiniteperformance v12 odyssey xio xio 104 to 1 664 7 128 to 2 048 7 2002 01 01 2006 01 01 performance edit model polygons millions per second pixel fill millions of pixels per second volume rendering millions of voxels per second infinitereality 10 9 infinitereality2 10 9 reality 5 5 94 to 188 note 1 100 to 200 infinitereality2e 13 1 to 210 8 192 to 6 100 200 to 6 400 infinitereality3 13 1 to 210 5 600 6 800 infinitereality4 13 1 to 210 20 640 note 2 12 800 infiniteperformance 18 to 288 7 168 note 2 6 800 notes anti aliased z buffered textured a b 8 by 8 sub sampled anti aliased z buffered textured lit 40 bit color pixels references edit a b c d e f john s montrym et al infinitereality a real time graphics system acm siggraph a b c d e john montrym brian mcclendon infinitereality graphics power through complexity advanced systems division silicon graphics inc mark j kilgard realizing opengl two implementations of one architecture 1997 siggraph eurographics workshop august 1997 onyx2 reality onyx2 infinitereality and onyx2 infinitereality2 technical report august 1998 silicon graphics inc a b c d remanufactured si...