Tseng Labs ET4000

Last updated
The Tseng ET4000AX chip in QFP ET4000AX (cropped).JPG
The Tseng ET4000AX chip in QFP

The Tseng Labs ET4000 was a line of SVGA graphics controller chips during the early 1990s, commonly found in many 386/486 and compatible systems, with some models, notably the ET4000/W32 and later chips, offering graphics acceleration. Offering above average host interface throughput coupled with a moderate price, Tseng Labs' ET4000 chipset family were well regarded for their performance, and were integrated into many companies' lineups, notably with Hercules' Dynamite series, the Diamond Stealth 32 and several Speedstar cards, and on many generic boards.

Contents

Models

ET4000AX

Orchid Prodesigner IIs ISA with ET4000AX ET4000AX.JPG
Orchid Prodesigner IIs ISA with ET4000AX

The ET4000AX was a major advancement over Tseng Labs' earlier ET3000 SVGA chipset, featuring a new 16-bit host interface controller with deep FIFO buffering and caching capabilities, and an enhanced, variable-width memory interface with support for up to 1MB of memory with a ≈16-bit VRAM or ≈32-bit DRAM memory data bus width. The FIFO buffers and cache functions had the effect of greatly improving host interface throughput, and therefore offering substantially improved redraw performance compared to the ET3000 and most of its contemporaries. The interface controller also offered support for IBM's MCA bus, in addition to an 8 or 16-bit ISA bus. [1] The ET4000AX could also support the emerging VESA Local Bus standard with some additional external logic, albeit with a 16-bit host bus width.

Neither the ET4000AX or its succeeding family members offered an integrated RAMDAC, [2] which hampered the line's cost/performance competitiveness later on.

ET4000/W32

Diamond Stealth 32 VLB with ET4000/W32p Dstealth32.jpg
Diamond Stealth 32 VLB with ET4000/W32p

Hardware acceleration via dedicated BitBLT hardware and a hardware cursor sprite was introduced in the ET4000/W32. [3] The W32 offered improved local bus support along with further increased host interface performance, but by the time PCI Windows accelerators became commonplace, high host throughput was no longer a distinguishing feature. Nevertheless, as a mid-priced Windows accelerator, the W32 benchmarked favorably against competing mid-range S3 and ATI chips. Configured with 32-bit asynchronous EDO/FPM (70 ns) DRAM, the W32 could sustain a transfer speed of ≈56 MB/s. [2]

ET4000/W32i

The W32i revision featured an interleaved 32-bit memory bus (with 2 MB+ of memory) to improve memory throughput. [4] It supports a maximum of 4 MB of video memory, [5] though most boards featuring the chip typically offer a maximum expansion of 2 MB or less.

ET4000/W32p

Integral Technologies I4596 PCI with ET4000/W32P ET4000-W32P PCI Card.jpg
Integral Technologies I4596 PCI with ET4000/W32P

The W32p model offered support for the PCI bus, [6] [7] although earlier revisions of this chip (prior to Revision D) had some design problems that caused sub-optimal or problematic operation when used in PCI implementations, although VLB implementations were unaffected.

Related Research Articles

Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory independently of the central processing unit (CPU).

<span class="mw-page-title-main">IBM 8514</span> IBM graphics card and computer display standard

IBM 8514 is a graphics card manufactured by IBM and introduced with the IBM PS/2 line of personal computers in 1987. It supports a display resolution of 1024 × 768 pixels with 256 colors at 43.5 Hz (interlaced), or 640 × 480 at 60 Hz (non-interlaced). 8514 usually refers to the display controller hardware. However, IBM sold the companion CRT monitor which carries the same designation, 8514.

<span class="mw-page-title-main">Micro Channel architecture</span>

Micro Channel architecture, or the Micro Channel bus, is a proprietary 16- or 32-bit parallel computer bus introduced by IBM in 1987 which was used on PS/2 and other computers until the mid-1990s. Its name is commonly abbreviated as "MCA", although not by IBM. In IBM products, it superseded the ISA bus and was itself subsequently superseded by the PCI bus architecture.

<span class="mw-page-title-main">ATI Technologies</span> Canadian technology corporation

ATI Technologies Inc., commonly called ATI, was a Canadian semiconductor technology corporation based in Markham, Ontario, that specialized in the development of graphics processing units and chipsets. Founded in 1985, the company listed publicly in 1993 and was acquired by AMD in 2006. As a major fabrication-less or fabless semiconductor company, ATI conducted research and development in-house and outsourced the manufacturing and assembly of its products. With the decline and eventual bankruptcy of 3dfx in 2000, ATI and its chief rival Nvidia emerged as the two dominant players in the graphics processors industry, eventually forcing other manufacturers into niche roles.

<span class="mw-page-title-main">Chipset</span> Electronic component to manage data flow of a CPU

In a computer system, a chipset is a set of electronic components on one or more integrated circuits that manages the data flow between the processor, memory and peripherals. The chipset is usually found on the motherboard of computers. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining performance.

<span class="mw-page-title-main">Atari Falcon</span> 1992 personal computer

The Atari Falcon030, released in 1992, is the final personal computer from Atari Corporation. A high-end model of the Atari ST line, the machine is based on a Motorola 68030 CPU and a Motorola 56001 digital signal processor, which distinguishes it from most other microcomputers of the era. It includes a new VIDEL programmable graphics system which greatly improves graphics capabilities.

<span class="mw-page-title-main">S3 ViRGE</span>

The S3 ViRGE (Video and Rendering Graphics Engine) graphics chipset was one of the first 2D/3D accelerators designed for the mass market.

<span class="mw-page-title-main">Tseng Labs</span>

Tseng Laboratories, Inc. was a maker of graphics chips and controllers for IBM PC compatibles, based in Newtown, Pennsylvania, and founded by Jack Hsiao Nan Tseng.

Cirrus Logic Inc. is an American fabless semiconductor supplier that specializes in analog, mixed-signal, and audio DSP integrated circuits (ICs). Since 1998, the company's headquarters have been in Austin, Texas.

<span class="mw-page-title-main">Trident Microsystems</span>

Trident Microsystems Inc. was a fabless semiconductor company that became in the 1990s a well-known supplier of integrated circuits for video display controllers used in video cards and on motherboards for desktop PCs and laptops. In 2003, it transformed itself into being a supplier of display processors for digital televisions, and primarily LCD TVs starting from 2005, at a time when the global LCD TV market started showing strong growth.

<span class="mw-page-title-main">Diamond Multimedia</span> American company

Diamond Multimedia is an American company that specializes in many forms of multimedia technology. They have produced graphics cards, motherboards, modems, sound cards and MP3 players; however, the company began with the production of the TrackStar, a PC add-on card which emulated Apple II computers. They were one of the major players in the 2D and early 3D graphics card competition throughout the 1990s and early 2000s.

<span class="mw-page-title-main">Oak Technology</span> American semiconductor company

Oak Technology (OAKT) was an American supplier of semiconductor chips for sound cards, graphics cards and optical storage devices such as CD-ROM, CD-RW and DVD. It achieved success with optical storage chips and its stock price increased substantially around the time of the tech bubble in 2000. After falling on hard times, in 2003 it was acquired by Zoran Corporation.

<span class="mw-page-title-main">Rendition, Inc.</span>

Rendition, Inc., was a maker of 3D computer graphics chipsets in the mid to late 1990s. They were known for products such as the Vérité 1000 and Vérité 2x00 and for being one of the first 3D chipset makers to directly work with Quake developer John Carmack to make a hardware-accelerated version of the game (vQuake). Rendition's major competitor at the time was 3Dfx. Their proprietary rendering APIs were Speedy3D and RRedline.

<span class="mw-page-title-main">Video display controller</span> Type of integrated circuit

A video display controller (VDC), also called a display engine or display interface, is an integrated circuit which is the main component in a video-signal generator, a device responsible for the production of a TV video signal in a computing or game system. Some VDCs also generate an audio signal, but that is not their main function. VDCs were used in the home computers of the 1980s and also in some early video picture systems.

<span class="mw-page-title-main">ATI Rage</span> Series of video cards

The ATI Rage is a series of graphics chipsets developed by ATI Technologies offering graphical user interface (GUI) 2D acceleration, video acceleration, and 3D acceleration developed by ATI Technologies. It is the successor to the ATI Mach series of 2D accelerators.

<span class="mw-page-title-main">SiS 630/730</span> Family of integrated chipsets from Intel and AMD

The SiS 630 and SiS 730 are a family of highly integrated chipsets for Intel and AMD respectively. At the time of release they were unique in that they not only provided VGA, Audio, LAN, IDE and USB functionality on board, but were also in a single-chip solution. At the time of release (1999) most chipsets were composed of physically separate north-bridge and south-bridge chips. Only later have single-chip solutions become popular in the mainstream, with chipsets such as the nVidia nForce4.

<span class="mw-page-title-main">Intel 810</span> Chipset by Intel

The Intel 810 chipset was released by Intel in early 1999 with the code-name "Whitney" as a platform for the P6-based Socket 370 CPU series, including the Pentium III and Celeron processors. Some motherboard designs include Slot 1 for older Intel CPUs or a combination of both Socket 370 and Slot 1. It targeted the low-cost segment of the market, offering a robust platform for uniprocessor budget systems with integrated graphics. The 810 was Intel's first chipset design to incorporate a hub architecture which was claimed to have better I/O throughput and an integrated GPU, derived from the Intel740.

Hombre is a RISC chipset for the Amiga, designed by Commodore, which was intended as the basis of a range of Amiga personal computers and multimedia products, including a successor to the Amiga 1200, a next generation game machine called CD64 and a 3D accelerator PCI card. Hombre was canceled along with the bankruptcy of Commodore International.

<span class="mw-page-title-main">Vortex86</span> X86-compatible system-on-a-chip

The Vortex86 is a computing system-on-a-chip (SoC) based on a core compatible with the x86 microprocessor family. It is produced by DM&P Electronics, but originated with Rise Technology.

<span class="mw-page-title-main">Voodoo2</span> Series of Graphics Cards

The Voodoo2 is a set of three specialized 3D graphics chips on a single chipset setup, made by 3dfx. It was released in February 1998 as a replacement for the original Voodoo Graphics chipset. The card runs at a chipset clock rate of 90 MHz and uses 100 MHz EDO DRAM, and is available for the PCI interface. The Voodoo2 comes in two models, one with 8 MB RAM and one with 12 MB RAM. The 8 MB card has 2 MB of memory per texture mapping unit (TMU) vs. 4 MB on the 12 MB model. The 4 MB framebuffer on both cards support a maximum screen resolution of 800 × 600, while the increased texture memory on the 12 MB card allows more detailed textures. Some boards with 8 MB can be upgraded to 12 MB with an additional daughter board.

References

  1. ET4000 Graphics Controller High-Performance Video Technology Data Book. Tseng Labs, Inc. 1989.
  2. 1 2 "Pre-3D (-1995)". Hattix.co.uk Computer Hardware Museum. 2023.
  3. Peddie, Jon (2022-08-24). "Tseng ET4000: Early Winner Falls Short on 3D". Electronic Design. Retrieved 2024-04-21.
  4. ET4000/W32i Graphics Accelerator Data Book (PDF). Tseng Labs, Inc. 1993. Archived from the original (PDF) on 2017-02-28.
  5. Vlask. "VGA Legacy MKIII - Tseng ET4000/W32i". VGA Legacy MKIII. Retrieved 2024-04-21.
  6. Vlask. "VGA Legacy MKIII - Tseng ET4000/W32p". VGA Legacy MKIII. Retrieved 2024-04-21.
  7. ET4000/W32p Graphics Accelerator Data Book (PDF). Tseng Labs, Inc. 1994.