Tseng Labs ET4000

Last updated
The Tseng ET4000AX chip ET4000AX Chip.jpg
The Tseng ET4000AX chip

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. [4]

ET4000/W32i

The /W32i revision featured an interleaved 32-bit memory bus (with 2MB+ of memory) to improve memory throughput. It supports a maximum of 4 MB of video memory, though most boards featuring the chip typically offer a maximum expansion of 2MB 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, 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 and 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 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">PCI Express</span> Computer expansion bus standard

PCI Express, officially abbreviated as PCIe or PCI-e, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X and AGP bus standards. It is the common motherboard interface for personal computers' graphics cards, hard disk drive host adapters, SSDs, Wi-Fi and Ethernet hardware connections. PCIe has numerous improvements over the older standards, including higher maximum system bus throughput, lower I/O pin count and smaller physical footprint, better performance scaling for bus devices, a more detailed error detection and reporting mechanism, and native hot-swap functionality. More recent revisions of the PCIe standard provide hardware support for I/O virtualization.

<span class="mw-page-title-main">Amiga 4000</span> 1992 personal computer

The Amiga 4000, or A4000, from Commodore is the successor of the Amiga 2000 and Amiga 3000 computers. There are two models: the A4000/040 released in October 1992 with a Motorola 68040 CPU, and the A4000/030 released in April 1993 with a Motorola 68EC030.

<span class="mw-page-title-main">3Dlabs</span>

3Dlabs was a fabless semiconductor company. It was founded in 1994 with headquarters in San Jose, California. It originally developed the GLINT and PERMEDIA high-end graphics chip technology, that was used on many of the world's leading computer graphics cards in the CAD and DCC markets, including its own Wildcat and Oxygen cards.

<span class="mw-page-title-main">DECstation</span> DEC brand of computers

The DECstation was a brand of computers used by DEC, and refers to three distinct lines of computer systems—the first released in 1978 as a word processing system, and the latter two both released in 1989. These comprised a range of computer workstations based on the MIPS architecture and a range of PC compatibles. The MIPS-based workstations ran ULTRIX, a DEC-proprietary version of UNIX, and early releases of OSF/1.

<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 was a fabless semiconductor company that in the 1990s, it became 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 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>

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 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">VAXstation</span>

The VAXstation is a discontinued family of workstation computers developed and manufactured by Digital Equipment Corporation using processors implementing the VAX instruction set architecture. VAXstation systems were typically shipped with either the OpenVMS or ULTRIX operating systems. Many members of the VAXstation family had corresponding MicroVAX variants, which primarily differ by the lack of graphics hardware.

<span class="mw-page-title-main">ATI Rage series</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>

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.

The AAA chipset was intended to be the next-generation Amiga multimedia system designed by Commodore International. Initially begun as a secret project, the first design discussions were started in 1988, and after many revisions and redesigns the first silicon versions were fabricated in 1992–1993. The project was all but abandoned in 1993 after it was projected that PCs were to equal the AAA shortly after release, so a further jump was needed, leading to project Hombre. AAA was not designed to be AGA compatible.

<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.

In addition to the Amiga chipsets, various specially designed chips have been used in Commodore Amiga computers that do not belong to the 'Amiga chipset' in a tight sense.

Apollo VP3 is a x86 based Socket 7 chipset which was manufactured by VIA Technologies and was launched in 1997. On its time Apollo VP3 was a high performance, cost effective, and energy efficient chipset. It offered AGP support for Socket 7 processors which was not supported at that moment by Intel, SiS and ALi chipsets. In November 1997 FIC released motherboard PA-2012, which uses Apollo VP3 and has AGP bus. This was the first Socket 7 motherboard supporting AGP.

References

  1. "ET4000 Graphics Controller Data Book". Tseng Labs Inc. 1990.
  2. "Hattix.co.uk: Computer Hardware Museum".
  3. "ET4000/W32i Graphics Accelerator Data Book" (PDF). Tseng Labs, Inc. 1993. Archived from the original (PDF) on 28 February 2017.
  4. "Hattix.co.uk: Computer Hardware Museum". hattix.co.uk. 2008. Retrieved 2013-06-22.