Editing Bus mouse

{{Short description|Type of computer mouse}}
{{One source|date=January 2022}}
{{Use dmy dates|date=February 2020|cs1-dates=y}}
{{Infobox connector
|name = Bus mouse
|type = [[Computer mouse]] input port
|image = [[Image:ISA mouse adapter.JPG|240px]]
|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_by = [[PS/2 port]], [[USB]] 
|superseded_by_date = {{start date and age|2000|df=yes}}
|hotplug=
|external = Yes
|cable = 9&nbsp;wires plus shield
|num_pins = 9
|physical_connector = [[Mini-DIN|Mini-DIN-9]]
|data_signal = 30–200&nbsp;Hz (interrupt mode) with 3&nbsp;button state signals and quadrature signals for mouse movement
|data_bit_width =
|data_bandwidth =
|data_devices =
|data_style =
|pinout_image = [[Image:MiniDIN-9 Diagram.svg|150px|center]]
|pinout_caption = Female port pin layout from the front
|pin1 = Mouse button&nbsp;2
|pin1_name = SW2
|pin2 = Mouse button&nbsp;3
|pin2_name = SW3
|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&nbsp;1
|pin7_name = SW1
|pin8 = +5&nbsp;V power
|pin8_name = [[IC power-supply pin|Vcc]]
|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 [[IBM PC compatible|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).

[[File:Microsoft_InPort_BUS_Mouse.png|thumb|alt=Microsoft InPort bus mouse|Microsoft InPort™ bus mouse, showing the 9-pin round connector]]
[[File:Microsoft InPort™ Mouse Label showing FCC ID.png|thumb|alt=Label from Microsoft InPort mouse|Label 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 [[Industry Standard Architecture|ISA]] add-in card) was one of two popular ways to connect a mouse; [[Serial port|serial interface]]s 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 [[computer keyboard|keyboard]] controller (still called the [[PS/2 port|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 [[PC-9801|NEC PC-98]] family of personal computers in Japan.

Quadrature bus mice, manufactured by the likes of Atari, Commodore, [[Logitech]] and [[AMX Mouse|AMX]], were supplied or sold, with propriety wiring, for Atari ST, Commodore Amiga, Acorn BBC Micro, Amstrad CPC, Sinclair ZX Spectrum, and Acorn Archimedes computers.<ref>{{Cite web |title=VELESOFT - AMIGA MOUSE,ATARI MOUSE,AMX MOUSE,AY MOUSE |url=https://k1.spdns.de/Vintage/Sinclair/82/Peripherals/Mouse%20Interfaces/Velesoft%20mixed%20stuff%20on%20mouse%20interfaces/VELESOFT%20-%20AMIGA%20MOUSE,ATARI%20MOUSE,AMX%20MOUSE,AY%20MOUSE.html |access-date=2025-04-17 |website=k1.spdns.de}}</ref><ref>{{Cite web |title=SmallyMouse2 – Universal USB to Quadrature Mouse Adapter – Waiting for Friday |url=https://www.waitingforfriday.com/?p=827 |access-date=2025-04-17 |website=www.waitingforfriday.com}}</ref>

==See also==
* [[BIOS interrupt call]]
* [[PS/2 port]]
* [[USB]]
* [[AMX Mouse]] - A bus mouse sold for the BBC Micro, Sinclair ZX Spectrum, and Amstrad CPC

==References==
{{Reflist|refs=}}

==Further reading==
* {{cite web |title=Re: [fd-dev] ANNOUNCE: CuteMouse 2.0 alpha 1 |author-first=Matthias R. |author-last=Paul |work=freedos-dev |date=2002-04-06 |url=https://marc.info/?l=freedos-dev&m=101807226917577 |access-date=2020-02-07 |url-status=live |archive-url=https://web.archive.org/web/20200207130948/https://marc.info/?l=freedos-dev&m=101807226917577&w=2 |archive-date=2020-02-07 |quote=[…] The original [[Mouse Systems]] Bus Mouse is a normal serial [[8250 UART|8250]] compatible mouse using the normal Mouse Systems serial protocol, however the base address of this 8250 type chip is not one of the usual [[COM port]] addresses 3F8h, 2F8h, 3E8h, or 2E8h, but either 238h or 338h. Besides others these addresses are also supported as alternative addresses for serial ports on the German c't UniRAM add-on [[ISA card]]. […] Bus mice from other vendors use completely different interfaces, partially residing at the same [[I/O address]]es […]}}

==External links==
* {{cite web |url=http://www.ardent-tool.org.uk/ohland/mouse.html |title=Mouse Connector |access-date=2006-10-27 |url-status=dead |archive-url=https://web.archive.org/web/20100731110928/http://www.ardent-tool.org.uk/ohland/mouse.html |archive-date=2010-07-31}} 

[[Category:Computer mice]]
[[Category:Legacy hardware]]