Help


[permalink] [id link]
+
Page "VESA Local Bus" ¶ 5
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

VESA and Local
By the time there was a strong market need for a bus of these speeds and capabilities, the VESA Local Bus and later PCI filled this niche and EISA vanished into obscurity.
For general desktop computer use it has been supplanted by later buses such as IBM Micro Channel, VESA Local Bus, Peripheral Component Interconnect and other successors.
The PCI Local Bus was first implemented in IBM PC compatibles, where it displaced the combination of ISA plus one VESA Local Bus as the bus configuration.
The VESA Local Bus ( usually abbreviated to VL-Bus or VLB ) was mostly used in personal computers.
VESA ( Video Electronics Standards Association ) Local Bus worked alongside the ISA bus ; it acted as a high-speed conduit for memory-mapped I / O and DMA, while the ISA bus handled interrupts and port-mapped I / O.
This led to the VESA consortium proposing and defining a Local Bus standard in 1992.
The VESA Local Bus was designed as a stopgap solution to the problem of the ISA bus's limited bandwidth.
When the Pentium processor arrived there were major differences in its bus design, and was not easily adaptable to a VESA Local Bus implementation.
Most PCs that used VESA Local Bus had only one or two VLB capable ISA slots from the 5 or 6 available ( thus 4 ISA slots generally were just that, ISA only ).
This was a result of VESA Local Bus being a direct branch of the 80486 memory bus.
Despite these problems, the VESA Local Bus became very commonplace on later 486 motherboards, with a majority of later ( post 1993 ) 486-based systems featuring a VESA Local Bus video card.
PCI also displaced the VESA Local Bus in the remaining 486 market, with some of the last 80486 motherboards featuring PCI slots instead of VLB slots.
* VESA Local Bus, a local bus based on the Intel 80486 CPU
* VESA Local Bus ( VLB ), once used as a fast video bus ( akin to the more recent AGP )
Compaq ) and then the VESA Local Bus Standard, were late 1980s expansion buses that were tied but not exclusive to the 80386 and 80486 CPU bus.
VESA Local Bus is an example of a local bus design.
* VESA Local Bus ( VESA )
The PC clone market did not want to pay royalties to IBM in order to use this new technology, and for desktop machines vendors of PC-compatibles stayed largely with the 16-bit AT bus, ( embraced and renamed as ISA to avoid IBM's " AT " trademark ) and manual configuration, although the VESA Local Bus was briefly popular for Intel ' 486 machines.
* VESA Local Bus ( VESA )

VESA and on
USB signals are not incorporated into the connector, but were earlier incorporated into the VESA Plug and Display connector used by InFocus on their projector systems, and in the Apple Display Connector, which was used by Apple until 2005.
* VESA Feature Connector ( VFC ), obsolete connector that was often present on older videocards, used as an 8-bit video bus to other devices
* VESA Display Power Management Signaling ( DPMS ), which allows monitors to be queried on the types of power saving modes they support
DPMS 1. 0 was issued by VESA in 1993, and was based on the United States Environmental Protection Agency's ( EPA ) earlier Energy Star power management specifications.
In the event, the new EISA bus was itself a commercial failure beyond the high end: By the time the cost of implementing EISA was reduced to the extent that it would be implemented in most desktop PCs, the much cheaper VESA Local Bus had removed most of the need for it in desktop PCs ( though it remained common in servers due to for example the possibility of data corruption on hard disk drives attached to VLB controllers ), and Intel's PCI bus was just around the corner.
Older ones were based on the 16-bit ISA bus or the transitional 32-bit VESA and EISA buses.
DDC version 3, December 1997, introduced the DDC2Bi protocol and support for VESA Plug and Display and Flat Panel Display Interface on separate device addresses, requiring them to comply with EDID 2. 0.
Consisting of two chips, one drawing the graphics known as the P9000 and another handling the output, the VideoPower 5x86, the POWER series was used in a number of 3rd party designs based on the VESA Local Bus standard.
The Modeline is based on the Generalized Timing Formula or the Coordinated Video Timings standards produced by VESA.
NiTro-VLB was a computer system that used a QED R4600 microprocessor implemented on a VESA Local Bus peripheral card and designed to function when connected to a host computer system using an Intel i486.
The most prominent example was the ELSA Revelator glasses, which worked exclusively in Nvidia cards through a proprietary interface based on VESA Stereo.
A synchronization signal is generated for LC shutter glasses worn by the viewer, using either a standard VESA Stereo plug to connect wired glasses or wireless emitters, or brief flashes of light on the viewing screen during the blanking interval.
The first version, 1. 0, was approved by VESA on May 3, 2006.
The Feature connector was an internal connector found mostly in some older VESA Local Bus, ISA and PCI graphics cards, but also on some early AGP ones.

VESA and memory
* Recommended-Pentium 90 MHz or better, 16 Mb RAM, VESA Local Bus ( VLC ) or PCI video card with fast DOS access & 1Mb of video memory, VESA 2. 0 Compliant Video card ( or software driver ), 4X speed CD-ROM and speed compensating joystick

VESA and bus
* VESA Advanced Feature Connector ( VAFC ), newer version of the above VFC that widens the 8-bit bus to either a 16-bit or 32-bit bus
This is the case, for instance, with the VESA Local Bus which lacks the two least significant bits, limiting this bus to aligned 32-bit transfers.
* Glueless PCI 2. 1 bus interface and VESA VL-Bus ( 325 ) interface
Their speeds often far exceeded the speed of normal ISA or even early PCI buses, e. g. 40 MByte / s for a standard ISA-based SVGA, up to 150 MByte / s for a PCI or VESA-based one, while the standard 16 bit ISA bus ran at ~ 5. 3 MByte / s and the VESA bus at up to 160 MByte / s bandwidth.

VESA and .
PCI video cards replaced ISA and VESA cards, until growing bandwidth requirements outgrew the capabilities of PCI ; the preferred interface for video cards became AGP, and then PCI Express.
However most still had either PCI or VLB slots alongside the still-ubiquitous ISA slots, and so-called " VIP " ( VESA / ISA / PCI ) boards with all three slot types were also produced.
An attempt at creating a standard mamed VESA BIOS Extensions ( VBE ) was made, but not all manufacturers used it.
M1-DA connectors are sometimes labeled as DVI-M1 ; they are used for the VESA Enhanced Video Connector and VESA Plug and Display schemes.
Generalized Timing Formula ( GTF ) is a VESA standard which can easily be calculated with the Linux gtf utility.
Coordinated Video Timings-Reduced Blanking ( CVT-RB ) is a VESA standard which offers reduced horizontal and vertical blanking for non-CRT based displays.
Similar to the analog VESA display power management signaling ( DPMS ) standard, a connected device can turn a monitor off when the connected device is powered down, or programmatically if the display controller (" graphics card ") of the device supports it.
The analog section of the DVI specification document is brief and points to other specifications like VESA VSIS for electrical characteristics and GTFS for timing information.
DVI and HDMI have the same electrical specifications for their TMDS and VESA / DDC links.
VESA (; Video Electronics Standards Association ) is an international standards body for computer graphics formed in 1988 by NEC Home Electronics, maker of the MultiSync monitor line, and eight video display adapter manufacturers: ATI Technologies, Genoa Systems, Orchid Technology, Renaissance GRX, STB Systems, Tecmar, Video 7 and Western Digital / Paradise Systems.

0.232 seconds.