Bus mouse

Infobox connector
name=Bus mouse
type=Computer mouse input port


caption=A Microsoft InPort bus mouse adapter, in the form of an 8-bit ISA (XT-bus) card.
designer=Microsoft
design_date=late 1980s
manufacturer=
production_date=1980s to 2000
superseded=DE-9 connector
superseded_by=PS/2 connector, USB
superseded_by_date=2000
external=Yes
hotplug=
length=
width=
height=
audio_signal=
video_signal=
data_signal=3 button state signals and quadrature signals for mouse movement
data_bit_width=
data_bandwidth=
data_devices=
data_style=
num_pins=9
pinout_

pinout_caption=
pin1=Mouse button 2
pin1_name=SW 2
pin2=Mouse button 3
pin2_name=SW 3
pin3=Ground
pin3_name=GND
pin4=X position
pin4_name=XB
pin5=Y position
pin5_name=YA
pin6=Y position
pin6_name=YB
pin7=Mouse button 1
pin7_name=SW1
pin8=Power
pin8_name=+5 V
pin9=X position
pin9_name=XA
pinout_notes=XA/XB and YA/YB indicate movement and direction based on quadrature phase.

A bus mouse is a variety of PC mouse which is attached to the computer using a specialized interface (originally, the Microsoft InPort interface developed for Microsoft's original mouse product). In the late 1980s, mice were not integrated with IBM-compatible personal computers, and the specialized bus interface (implemented via an ISA add-in card) was one of two popular ways to connect a mouse. (Serial interfaces, common on engineering workstations, were the other method.) When the IBM PS/2 was introduced, it included a motherboard mouse interface which was integrated with the keyboard controller (still called the PS/2 mouse interface long after the PS/2 brand was withdrawn); this fairly quickly drove the bus mouse design out of the marketplace.

The bus mouse lived on in the NEC PC-98 family of personal computers in Japan.

External links

* http://www.ardent-tool.org.uk/ohland/mouse.html