Asus Media Bus

2025-02-11T16:03:00Z

84.167.88.32: Specifications PCI-AS2940UW + PCI-AS300

[[Image:Pci-av868.JPG|thumb|Asus Media BUS Graphic/Sound card PCI-AV868. Graphics runs over PCI, Sound runs over ISA]]
[[Image:Media bus p55tp4xe.jpg|thumb|Asus Media Bus v1.2 slot (no space between sockets) on P55TP4XE]]

The '''Asus Media Bus''' is a proprietary [[computer bus]] developed by [[Asus]], which was used on some [[Socket 7]] [[motherboards]] in the middle 1990s. It is a combined [[Peripheral Component Interconnect|PCI]] and [[Industry Standard Architecture|ISA]] slot. It was developed to provide a cost-efficient solution to a complete multimedia system. Using Media Bus cards for building a system reduced slot requirements and compatibility problems.<ref name="Asus P/I-P55T2P4 User's Manual">{{cite web|title=Asus P/I-P55T2P4 Pentium Motherboard User's Manual rev. 3.11 May 1997|url=http://dlcdnets.asus.com/pub/ASUS/mb/sock7/430hx/p55t2p4/p55t2p4-311.pdf?_ga=2.126517450.634504119.1587587524-1513537974.1574552782|publisher=ASUSTeK COMPUTER Inc.| access-date=22 April 2020|page=18|date=May 1997}}</ref> Expansion cards supporting this interface were only manufactured by Asus for a very limited time. This bus is now obsolete.

While similar to [[PCI-X]] in appearance, the extension contains 4 additional pins (2 on each side) for a total of 68. The divider between the PCI slot and Media Bus extension is too wide to support a properly-keyed PCI-X card.

Despite the very short lifespan, there were at least two revisions of Asus Media Bus – revision 1.2 and 2.0. The difference between them is that the latter revision has 72 pins instead of 68 so it does not have to use any PCI slot signals reserved for PCI cards and PCI slot shared with the Media Bus slot becomes standards compliant. The gap between PCI slot and Media Bus extension is 0.32 in. for revision 1.2 (pictured) and 0.4 in. for revision 2.0 so expansion cards designed for two revisions are mutually incompatible.<ref name="Asus P/I-P55T2P4 User's Manual"/>

Expansion cards designed for this interface included primarily combined [[Sound|audio]] and [[video]] cards, but also some combined [[SCSI]] and audio cards. The (possibly incomplete) list of Media Bus expansion cards presented here (all cards manufactured by Asus):
<br />

'''''Media Bus rev. 1.2 cards'''''
* PCI-AS7870 – Fast/Wide SCSI and audio card (Adaptec AIC-7870P and [[Sound_Blaster#Sound_Blaster_ViBRA16|Vibra16s]] (with separate Yamaha [[Yamaha_YMF262|YMF262-M]]))
* PCI-AV264CT – audio and video card (ATI Mach64 PCI 1 MiB (up to 2 MiB) and Vibra16s (with separate Yamaha YMF262-M))
* PCI-AV868 (pictured) – audio and video card (S3 Vision868 1 MiB and Vibra16s (with separate Yamaha YMF262-M))

'''''Media Bus rev. 1.2 motherboards'''''
* Asus P/I-P55SP4
* Asus P/I-P55TP4XE

'''''Media Bus rev. 2.0 cards'''''
* PCI-AS2940UW – Ultra Fast/Wide SCSI and audio card (Adaptec AIC-7880P and [[Sound_Blaster#Sound_Blaster_ViBRA16|Vibra16s]] (with separate Yamaha [[Yamaha_YMF262|YMF262-M]]))
* PCI-AS300 – Ultra Fast/Wide SCSI and audio card (Adaptec AIC-7880P and Vibra 16c)
* PCI-AV264CT-N – audio and video card ([[ATI Mach series|ATI Mach64]] PCI 1 MiB (up to 2 MiB) and Vibra16c) <ref name="Asus ATI VGA Series User's Manual">
{{cite book |last=AsusTek |first=Computer Inc. |date=December 1996 |title=Asus ATI VGA Series User's Manual |publisher=ASUSTeK COMPUTER Inc. |page=52 }}</ref>
* PCI-AV264VT – audio and video card (ATI Mach64 PCI 1 MiB (up to 2 MiB) and Vibra16c)
* PCI-AV264GT – audio and video card (ATI Rage PCI 2 MiB and Vibra16c) <ref name="Asus ATI VGA Series User's Manual"/>
* PCI-AV264GT/Plus – audio and video card ([[ATI_Rage_series#3D_RAGE_II_(II+,_II+DVD,_IIc)|ATI 3D Rage II]] 2 MiB (up to 4 MiB) and Vibra16c)

'''''Media Bus rev. 2.0 motherboards''''' Socket 7
* Asus P/E-P55T2P4D (Dual)
* Asus P/I-P55T2P4
* Asus P/I-P55TVP4
* Asus P/I-XP55T2P4
* Asus P/I-XP55T2P4S
* Asus P55TP4N
* Asus TXP4-X (optional?)
* Asus TX97
* Asus TX97-E
'''''Media Bus rev. 2.0 motherboards''''' Socket 8
* Asus P/I-P6NP5
* Asus P/I-P6RP4
* Asus P/I-XP6NP5
* Asus P65UP5 + P6ND CPU Card (Dual)

== References ==
<references/>

{{Asus|computers=yes|tablets=yes|phones=yes|other1=yes|other2=yes|below=yes}}
{{Computer-bus}}
[[Category:Asus products|Media Bus]]
[[Category:Computer buses]]

{{Compu-hardware-stub}}

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Asus Media Bus