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Bus mouse
A Microsoft InPort bus mouse adapter, in the form of an 8-bit ISA (XT-bus) card
Type
Computer mouse input port
Production history
Designer
Microsoft
Designed
late 1980s
Produced
1980s to 2000
Superseded by
PS/2 port, USB (2000; 24 years ago (2000))
General specifications
External
Yes
Cable
9 wires plus shield
Pins
9
Connector
Mini-DIN-9
Data
Data signal
30–200 Hz (interrupt mode) with 3 button state signals and quadrature signals for mouse movement
Pinout
Female port pin layout from the front
Pin 1
SW2
Mouse button 2
Pin 2
SW3
Mouse button 3
Pin 3
GND
Ground
Pin 4
XB
X position
Pin 5
YA
Y position
Pin 6
YB
Y position
Pin 7
SW1
Mouse button 1
Pin 8
Vcc
+5 V Power
Pin 9
XA
X position
XA/XB and YA/YB indicate movement and direction based on quadrature phase.
A bus mouse is a variety of PC computer mouse which is attached to the computer using a specialized interface (originally, the Microsoft InPort interface developed for Microsoft's original mouse product).
Microsoft InPort™ bus mouse, showing the 9-pin round connectorLabel on the bottom of a Microsoft InPort™ bus mouse, showing the FCC ID "C3K7PN9937"
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 were the other method. In addition to Microsoft, Logitech also made bus mouse interface cards.
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which was integrated with the keyboard controller (still called the PS/2 mouse interface long after the PS/2 brand was withdrawn); this fairly quickly drove the bus mouse design out of the marketplace.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.
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on the bus to reset For instance, if the mouse is known to be at address $D, the computer will periodically send out a 1-byte message on the bus that looks...
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device in the chain plugs; the exception is the mouse which has only the output connector. HIL buses can be found on HP PA-RISC and m68k based machines...
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