internal buses

Parallel Internal Computer Buses
Rate this post

  • ASUS Media Bus: The Asus Media Bus is a proprietary computer bus developed by Asus, which was used on some Socket 7 motherboards. It is a combined LAPTOPI and ISA slot. Expansion cards supporting this interface were only manufactured by Asus for a very limited time.
  • CAMAC for instrumentation systems: Computer Automated Measurement And Control (CAMAC) is a standard bus for Data acquisition and control used in nuclear and particle physics experiments and in industry. The bus allows data exchange between plug – in – modules (up to 24 in a single crate) and a crate controller, which then interfaces to LAPTOP or to a VME-CAMAC interface.
  • Extended ISA or EISA: The Extended Industry Standard Architecture (in practice almost always shortened to EISA and frequently pronounced “eee-suh”) is a bus standard for IBM compatible computers.

    EISA extends the AT bus, which the Gang of Nine retroactively renamed to the ISA bus to avoid infringing IBM’s trademark on its LAPTOP/AT computer, to 32 bits and allows more than one CPU to share the bus. The bus mastering support is also enhanced to provide access to 4 GB of memory. Unlike MCA, EISA can accept older XT and ISA boards – the lines and slots for EISA are a superset of ISA.

  • Industry Standard Architecture or ISA: Industry Standard Architecture (in practice almost always shortened to ISA) was a computer bus standard for IBM compatible computers.
  • Low Pin Count or LLAPTOP: The Low Pin Count bus, or LLaptop bus, is used on IBM-compatible personal computers to connect low – bandwidth devices to the CPU, such as the boot ROM and the “legacy” I/O devices (behind a super I/O chip). The “legacy” I/O devices usually include serial and parallel ports, keyboard, mouse and – more recently – the Trusted Platform Module. The physical wires of the LLAPTOP bus usually connect to the southbridge chip on a LAPTOP motherboard.
  • MicroChannel or MCA: Micro Channel Architecture was a proprietary 16 or 32- bit parallel computer bus created by IBM in the 1980s for use on their new PS/2 computers.
  • NuBus or IEEE 1196: NuBus is a 32 – bit parallel computer bus, originally developed at MIT as a part of the NuMachine workstation project, and eventually used by Apple Computer, NeXT and Texas Instruments. It is no longer widely used outside of the embedded market.
  • Peripheral Component Interconnect or LAPTOPI: The Peripheral Component Interconnect or LAPTOPI Standard, specifies a computer bus for attaching peripheral devices to a computer motherboard. These devices can take any one of the following forms:-
  • An integrated circuit fitted onto the motherboard itself, called a planar device in the LAPTOPI specification.
  • An expansion card that fits into a socket.
  • The LAPTOPI bus is common in modern LAPTOPs, where it has displaced ISA and VESA Local Bus as the standard expansion bus, but it also appears in many other computer types.
  • VESA Local Bus or VLB or VL- Bus: The VESA Local Bus was mostly used in personal computers. VESA 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.

    A VLB slot itself was an extension of an existing ISA slot. Indeed, both VLB and ISA cards could be plugged into a VLB slot. The extended portion was usually coloured a distinctive brown. This made VLB cards quite long, reminiscent of the expansion cards from the old XT days. The addition resembled a LAPTOPI slot, and indeed VLB and LAPTOPI use the same physical connector.

  • AGP Bus: The Accelerated Graphics Port (AGP) is a high- speed point – to – point channel for attaching a graphics card to a computer’s motherboard, primarily to assist in acceleration of 3D computer graphics.
Show Buttons
Hide Buttons