The Asus Media Bus is a proprietary computer bus developed by Asus, which was used on some

Socket 7 Socket 7 is a physical and electrical specification for an x86-style CPU socket on a personal computer motherboard. It was released in June 1995. The socket supersedes the earlier Socket 5, and accepts P5 Pentium microprocessors manufactured by ...

motherboards A motherboard (also called mainboard, main circuit board, mb, mboard, backplane board, base board, system board, logic board (only in Apple computers) or mobo) is the main printed circuit board (PCB) in general-purpose computers and other expand ...

in the middle 1990s. It is a combined PCI and 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. 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 PCI-X, short for Peripheral Component Interconnect eXtended, is a computer bus and expansion card standard that enhances the 32-bit PCI local bus for higher bandwidth demanded mostly by servers and workstations. It uses a modified protocol t ...

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. Expansion cards designed for this interface included primarily combined

audio Audio most commonly refers to sound, as it is transmitted in signal form. It may also refer to: Sound * Audio signal, an electrical representation of sound *Audio frequency, a frequency in the audio spectrum * Digital audio, representation of sou ...

and

video Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) syst ...

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):
''Media Bus rev. 1.2 cards'' * PCI-AS7870 – Fast/Wide SCSI and audio card (Adaptec AS7870 and Vibra16s (with separate Yamaha yfm262-m)) * PCI-AV264CT – audio and video card (ATI Mach64 PCI 1 MiB (up to 2 MiB) and Vibra16s (with separate Yamaha yfm262-m)) * PCI-AV868 (pictured) – audio and video card (S3 Vision868 1 MiB and Vibra16s (with separate Yamaha yfm262-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 * PCI-AV264CT-N – audio and video card ( ATI Mach64 PCI 1 MiB (up to 2 MiB) and Vibra16c) * 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) * PCI-AV264GT/Plus – audio and video card ( 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

Media Bus Computer buses {{Compu-hardware-stub