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Topic: Unified Memory Architecture

	[No title] (Site not responding. Last check: 2007-10-20)
		It should be understood that a unified memory architecture system is intended to mean a memory system that allows a plurality of requests to be made to the memory space of the memory and which allows each requestor to access any region of that memory space.
		The circuit as described in claim 3 wherein the arbiter is capable of passing the command to a memory controller with a selector-tag to identify the channel selector that routed the command to the memory channel.
		The method of utilizing a Unified Memory Architecture system as described in claim 13 and further comprising: passing the command to a memory controller with a selector-tag to identify the channel selector that routed the command to the memory channel.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/34294.990708&ELEMENT_SET=DECL (5032 words)

	Uma - Wikipedia, the free encyclopedia
		Uma Bharati is an Indian politician and sannyasin.
		Uniform Memory Access is a computer memory architecture used in parallel computers having multiple processors and probably multiple memory chips.
		Unified Memory Architecture (UMA), a technology that allows a GPU to share system memory through dynamic partitioning.
	en.wikipedia.org /wiki/Uma (260 words)

	Uma (Site not responding. Last check: 2007-10-20)
		Viper- UMA chipset is based on the Unified Memory Architecture...
		Cyclone Uma, a tropical cyclone which caused considerable damage to Port Vila, Vanuatu in 1987.
		Unified Memory Architecture in computing is when the video memory is shared with the main memory.
	hallencyclopedia.com /Uma (371 words)

	Computer engineering other topics - Info on unified memory architecture (Site not responding. Last check: 2007-10-20)
		this memory would be known as unified memory architecture ie.
		I'm doing an assignment on Unified Memory Architecture but didn't understand what it was about, the information you have provided has be of much help, i'm not the origional person who asked for the information but thank you all the same.
		Unified Memory Architecture is a computer that has graphics chips built into the motherboard that use part of the computer's main memory for video memory is said to have Unified Memory Architecture.
	www.eng-tips.com /viewthread.cfm?qid=10488 (477 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Memory manager 760 may be responsible for keeping track of virtual memory mapping for all of units 751, 752,753,755,756,756, and 758.
		By combining memory mapping functions for a number of units in a multi-media system, the overall size and complexity of the system may be reduced.
		The memory manager of claim 3, wherein said memory controller monitors frequency of access of data in said portions of system memory and said portions of local memory and dynamically transfers frequently accessed data from system memory to local memory and updates the memory map to indicate new locations for transferred data.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/03040.990121&ELEMENT_SET=DECL (5794 words)

	SGI O2 - Wikipedia, the free encyclopedia
		Due to the unified memory architecture, framebuffer memory comes from main memory, and there is effectively an 'unlimited' amount of texture memory.
		The Unified Memory Architecture means that the O2 uses main memory for graphics textures, making texturing polygons and other graphics elements trivial.
		Instead of transferring textures over a bus to the graphics subsystem, the O2 passes a pointer to the texture in main memory which is then accessed by the graphics hardware.
	en.wikipedia.org /wiki/SGI_O2 (684 words)

	Hitachi to Release 2-D Graphics Renderer Chip for the SuperH Family
		With this architecture, all graphics data, including color graphics for natural images, etc., and data with different data formats, such as fonts and patterns, is managed in the same memory.
		Unified graphics memory architecture: A method of managing data of different formats in the same memory.
		Double-buffer architecture: An architecture in which two areas-one used for drawing and one for display-are provided in graphics memory, and their roles are switched at regular intervals.
	www.hitachi.com /New/cnews/E/1997/971104B.html (1176 words)

	New Page 1
		Direct Rambus uses pipelining to move data from RAM to cache memory levels that are closer to the microprocessor or display.
		Memory is the network of electrically-charged points in which a computer stores quickly accessible data in the form of 0s and 1s.
		RAM (random access memory) is the place in a computer where the operating system, application programs, and data in current use are kept so that they can be quickly reached by the computer's processor.
	www.cs.umd.edu /class/fall2001/cmsc411/proj01/xbox/Glossary.htm (1484 words)

	TOSHIBA ENTERS U.S. AUTOMOTIVE MARKET WITH COST-EFFECTIVE SINGLE CHIP SOLUTION FOR CAR INFORMATION SYSTEMS (Site not responding. Last check: 2007-10-20)
		The unified memory architecture provides the central processing unit (CPU) with direct access to the display memory and realizes high performance graphics operations, including flexibility for drawing and rendering functions.
		The unified memory architecture has a high performance, dual bus structure with a video bus and a CPU bus.
		External to the memory core, the chip's integrated memory controller consists of two modules, the SDRAM controller and the memory controller for static random access memory, read only memory and Flash memory; six multi-purpose memory channels are supported.
	www.toshiba.com /taec/press/to-183.shtml (842 words)

	Mark Haas & Associates (Site not responding. Last check: 2007-10-20)
		Like other fashions that run in cycles, computer manufacturers today are rethinking the unified memory architecture, or UMA, a technology used nearly twenty years ago in the original Apple II computer.
		UMA requires an arbitration mechanism to let the CPU and graphics controller share the memory bus peacefully, enabling CPU access, screen refresh, video processing, and graphics operations to occur in an orderly fashion.
		Microsoft is so concerned about the potential effects UMA might have on system performance, it is reported to have circulated a document to systems vendors warning of this problem.
	www.haas.com /doc/rambus2.htm (1107 words)

	Electronic News: VUMA could change memory landscape - VESA Unified Memory Architecture - Technology Information
		Mountain View, Calif.--A new landscape for DRAM prices is expected to push PC main memory to 16 megabytes as early as 2Q96, according to more optimistic industry opinion, ushering in the proliferation of recently standardized unified memory architecture (UMA) and setting the stage for a 3-D graphics migration to the motherboard.
		Kirstein estimates UMA will appear in more than 10 percent of PCs shipping in the second half of the year but expects it at no time to penetrate more than half the total market.
		Recognizing that UMA's cost effectiveness is somewhat tarnished in the new DRAM market, he asserted that the technology will nevertheless evolve through the mass market and onto high-performance systems.
	www.findarticles.com /p/articles/mi_m0EKF/is_n2108_v42/ai_18117224 (984 words)

	bit-tech.net \| How the Xbox 360 affects PC gamers
		Rather than using separate graphics and system memory, it appears that the Xbox 360 uses a unified memory architecture that splits the memory as it needs.
		We are rather unlikely to see this kind of shared memory architecture in PCs any time soon, because it would require a substantial redesign of the entire platform, which isn't something that either AMD or Intel are keen to do right now.
		Nvidia have gone on record as saying that they think a unified shader architecture is a bad idea, whilst ATI have gone on record as saying they think it's the way forward for PC graphics.
	www.bit-tech.net /columns/2005/05/13/xbox_360_pc_enthusiasts/1.html (1153 words)

	EDN -- 01.04.96 integrated circuits
		Based on Unified Memory Architecture, a 64-bit graphical user interface and video accelerator for Windows 95 uses existing PC system memory, rather than dedicated graphics memory, to process video images.
		The module’s sector architecture comprises 16 equal-sized sectors of 64 kbytes for each of the four 1024k×8-bit chips.
		Both memories also embody a boot-block architecture that allows variable block sizes and features a hardware-lockable boot block for fail-safe updates.
	www.edn.com /archives/1996/010496/01prod2.htm (1985 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Their hope was to produce a single-chip architecture able to compete with the performance of multi-chip architectures at a greatly reduced cost.
		Due to the unified memory architecture, textures may be distributed over all of the pixel processors.
		Examples of this include the choice of SDRAM over other memory technologies, sizing of the stamp under different conditions such as texture mapping, various interleaving techniques for the distribution of the frame buffer over the pixel processors, and so forth.
	www.cs.unc.edu /~hantak/classes/COMP290052F03/NeonReview.doc (1079 words)

	www.FSCK.it ® moosehad intro Copyright © 1999-2005
		The O2 workstation, first released on October 10th 1996, uses a system design entitled Unified Memory Architecture, or UMA for short (not to be confused with NUMA which refers to the Origin server architecture).
		UMA doesn't solve every problem, but when it comes to satisfying the demands placed on workstations by users, it is an ideal low-cost solution.
		O2 is based on a new unified memory architecture that puts 2.1 gigabytes of system bandwidth right where the computation is done, that's 20 times the bandwidth of today's [1996] fastest PC.
	www.fsck.it /html/geek/o2/o2.html (5800 words)

	EDN -- 11.09.95 unified-memory-architecture chip set provides 64-bit bus (Site not responding. Last check: 2007-10-20)
		The 64-bit Viper-UMA unified-memory-architecture (UMA) version of Opti’s Viper core-logic chip sets provides graphics and video peripherals with direct access to the 64-bit memory bus instead of the 32-bit-wide PCI bus.
		UMA permits the system to allocate the correct amount of DRAM the frame buffer requires, eliminating the need for a dedicated frame-buffer DRAM.
		Opti based the chip set on the UMA standard, called VUMA, which the Video Electronics Standards Association plans to ratify soon; Opti acted as chair for the standards committee that defined VUMA.
	www.edn.com /archives/1995/110995/23out12.htm (224 words)

	Ace's Hardware (Site not responding. Last check: 2007-10-20)
		Typical for this Wildcat ParaScale architecture is that the frame buffer and texture buffer are completely separate as opposed to all other competitors which use a unified memory architecture.
		This 256-bit interface is, of course, not as powerful as a full 256-bit unified memory architecture, as it is unlikely that the framebuffer and texture buffer will require exactly the same bandwidth, but offers some extra bandwidth over a "normal" 128 bit unified architecture.
		A minor disadvantage is the inflexibility of the architecture.
	www.aceshardware.com /read.jsp?id=45000355 (912 words)

	Short-Media Forums - ATI’s Chipsets for AMD64 with DirectX 9 Graphics Uncovered
		There are other chipset companies hinting at SMA (Shared Memory Architecture) aka UMA (Unified Memory Architecture) in their next-generation chipsets with integrated graphics for Athlon 64 and 64 FX microprocessors.
		AMD64 chips have integrated memory controller, while traditional desktop platforms incorporate memory controller inside the North Bridge so that system memory could be easily shared between the processor, integrated graphics core and other components.
		Since AMD64 memory controller is located inside the CPU, graphics core from the North Bridge of a chipset will have to communicate with RAM via HyperTransport PSB that may cause additional latencies and slow the overall performance of the integrated core.
	www.short-media.com /forum/printthread.php?t=6831 (400 words)

	ABOX (Site not responding. Last check: 2007-10-20)
		Unified Memory Architecture means that the entire system memory is made available as a unified memory which stores all types of data, such as programs and their data, display data, 3D-textures or Z-buffer data, audio data, incoming flows of video data etc. etc.
		When the memory is expanded with inexpesnive SDRAM modules, the additional memory capacity is then always available for all applications and functions in the system.
		In terms of its principle UMA corresponds to the Amiga Chip RAM which can be addressed both by the processor and by the custom chips and video and audio DMA units of the Amiga.
	www.webworldinc.com /transdata/ti00057.htm (2681 words)

	Beyond3D - Which was nice. (Site not responding. Last check: 2007-10-20)
		Once upon a time, Amiga had UMA, and it was its main source of supremacy over the contemporary PCs in the graphics speed.
		Also, in the conventional PC system architecture, data must frequently be copied from one memory pool to another (system memory, AGP memory, GPU memory), so that for any procedural data generated by the CPU, you waste a lot of bandwidth as it crosses the bus multiple times.
		I think that when you net everything out, unified memory is a big win, because it creates optimization opportunities that aren't there, otherwise.
	www.beyond3d.com /interviews/croteammonv/index3.php (1245 words)

	Mark Haas & Associates (Site not responding. Last check: 2007-10-20)
		Nintendo has been able to achieve this price/performance breakthrough through a highly efficient design that combines a high level of functional integration with a high-bandwidth unified memory architecture.
		The simplicity of a unified memory architecture appealed to Nintendo's engineers for its cost-cutting potential, but in order to meet their performance goals they estimated it would require a bandwidth of at least 450 megabytes per second to handle all the CPU, graphics and audio functions.
		At the same time, they have demonstrated beyond a doubt the ability of Rambus technology to meet the performance requirements of a high-bandwidth unified memory architecture while providing a substantial cost savings.
	www.haas.com /doc/rambus1.htm (942 words)

	accelenation.com
		To remedy the situation with latency and the Athlon 64’s single channel memory controller, SIS has given the 760 3 modes of frame buffer access.
		This method was commonly used with older Pentium chipsets such as the SIS6205 and Intel i810E; before unified memory solutions became the dominant standard.
		The second mode of video memory is the traditional unified memory architecture.
	accelenation.com /?ac.id.212.2 (413 words)

	Multics Bibliography
		It is tentatively concluded that this approximation is untenable for main memory, especially under working set policies; and that the linearity of the data for the drum reflects the behavior of the Multics scheduler for background jobs, not the behavior of programs.
		This primary memory requirement estimate was employed in an experimental version of Multics to control the level of multiprogramming in the system and...
		This thesis proposes a particular architecture, to be used as an example of a class of suitable designs, with the intention that this example serve as a tool in understanding the large number preferable form.
	www.multicians.org /biblio.html (11838 words)

	Welcome to AnandTech.com [ Article: Chipset Guide]
		A combination of meeting these requirements, the extremely large cacheable memory area of the chipset, and a feature-set that puts Intel's TX Chipset to shame makes the Aladdin V chipset appear to be the king of the Socket-7 arena...or at least a contender for the throne.
		The 256MB maximum memory limit of the TX chipset is blurred by its meager 64MB cacheable memory area which takes us back to the old days of the FX chipset.
		UMA can be thought of as a sort of pre-AGP which allows your video card to share your system memory with the sacrifice of some performance, about a 5% loss overall.
	www.anandtech.com /printarticle.aspx?i=155 (3683 words)

	Business Wire: OPTi's Viper-UMA first to adopt emerging VESA-U... @ HighBeam Research (Site not responding. Last check: 2007-10-20)
		Viper-UMA chipset is based on the Unified Memory Architecture standard soon to be ratified by the Video Electronics Standards Association (VESA).
		Henry Quan, vice president of ATI Technologies, Inc., stated, "Unified Memory Architectures, like the OPTi Viper-UMA, hold the promise of creating a new, lower-cost platform for the PC industry.
		"Unified Memory Architecture (UMA) systems have the potential to significantly reduce end-user costs and help alleviate DRAM memory availability problems," said S3's Sunil Sanghavi, group director of marketing, home and advanced systems.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:17490126&refid=holomed_1 (523 words)

	Philips Semiconductors and Micron Technology First to Bring Micron SyncFlash™ Memory to Set-Top Boxes in Nexperia ... (Site not responding. Last check: 2007-10-20)
		The pnx8320 improves advanced STB performance, reduces cost with a 32-bit unified memory architecture (UMA) supporting Micron's SyncFlash memory, and enables customers to execute code directly from a non-volatile device residing on the main SDRAM memory bus.
		"Micron's SyncFlash memory is yet another STB-market breakthrough for the Nexperia Home Entertainment Engine family, and is essential to our pnx8320 strategy for driving low cost digital STBs with advanced services into the mainstream," said David Barringer, Director of Marketing for Philips Semiconductors' DVI business unit.
		The high performance bus, unified memory architecture, Micron's SyncFlash memory and a patented memory management technique allow the pnx8320 MIPS processor to achieve up to three times the performance of an embedded processor running at the same speed with a traditional memory architecture.
	www.micron.com /News/product/2000-11-29_16268.html?print=yes (596 words)

	Unified Memory Architecture (445)
		IME has created a memory architecture that has the potential to replace most of the different types of memory and storage in computers and digital devices.
		In a competitive market of ever-smaller memories, they were replaced by volatile transistor-based memories for fast memory (which can not hold data after the power is shut off), and by technologies like mechanical disk drives for storage.
		Advantages here include simplified memory architecture as well as the elimination of moving mechanical heads, both of which would considerably speed performance.
	www.mdatechnology.net /techsearch.asp?articleid=445 (1313 words)

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