Computer bus is a subsystem that transfers data between components inside a computer or between computers.

Modern computer buses can use parallel and bit-serial connections, and can be wired in either a multidrop (electrical parallel) or daisy chain topology, or connected by switched hubs, as in the case of USB.

Forward to / Apple / obsolete / obsolete computers / Sun pinouts or follow to 17 MODERN hardware pinouts.
See also RS-232 and other serial ports and interfaces pinouts
  • ACR (Advanced Communications Riser) Advanced Communications Riser (ACR) is a slot for connecting a specific hardware, such as AMR hardware, Cable Modem, DSL, Wireless, HomePNA, Ethernet, etc. This slot is a successor to AMR (Audio Modem Riser).
  • AGP interface AGP (Accelerated Graphics port) is a modified version of PCI bus designed to speed up transfers to video cards.
  • ISA bus ISA=Industry Standard Architecture
  • JAMMA JAMMA=Japanese Arcade Machine Manufacturers Association
  • PC Card ATA bus This specification makes it possible to share ATA & PC Card with the same connectors.

Apple Pinouts

obsolete Pinouts

  • Communication and Networking Riser (CNR) The CNR connector is the interface between the motherboard and the CNR board. The connector provides all of the necessary signals to support several different configurations of audio, modem, and/or LAN subsystems in the system
  • EISA bus This file is intended to provide a basic functional overview of the EISA Bus, so that hobbyists and amateurs can design their own EISA compatible cards.
  • Electrocoin The Electrocoin standard was introduced before JAMMA (Japanese Arcade Machine Manufacturers Association) to allow various games to be connected to generic cabinets such as Silverline and Goliaths.
  • MCA 16 bit bus 
  • MCA 32 bit bus plus MCA memory-matched extensions, MCA AVEC Auxiliary Video Extension Connector
  • VESA LocalBus (VLB) VLB=VESA Local Bus. VESA=Video Electronics Standards Association.

obsolete computers Pinouts

  • +4 User port Available on Commodore +4 computer.
  • Amiga 1000 Ramex 
  • Amiga 1200 CPU-port 
  • Amiga Expansion Bus A.K.A Zorro I These are the connections found at the side of the Amiga 1000 and Amiga 500 computers. They are electric and mechanical compatible with the single exception of being rotated 180 degrees looking at it from the top of the PCB this can cause trouble connecting a expansion meant for the A1000 into the A500 and vice versa. This Bus is like most Buses at this time a extension on the CPU Bus.
  • Amiga Expansion Bus Zorro II These are the connections found at the side of the Amiga computers. This Bus is like most Buses at this time a extension on the CPU Bus.
  • Amiga Expansion Bus Zorro II/III 
  • C-bus II Developed by Corolla. C-bus II is the successor to C-bus & Extended C-bus.
  • CD32 Expansion-port 
  • Commodore 64 / 128 User I/O 
  • ECB bus The ECB-bus was defined in 1984 by the german company KONTRON. It was defined of 100x160mm-europa-card and used 2x32 pins (row a and c). Later the third (middle) row of pins was defined for 16-bit-systems. Such bus uses all 3x32pins.
  • STEbus  STEbus (IEEE-1000)
  • Unibus Available on the old Digital PDP-11

Sun Pinouts

  • SUN SBus SBus is a computer bus system that was used in most SPARC-based computers from Sun Microsystems during the 1990s

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