Editing IBM PC keyboard (section)

==Connection==

{| class="wikitable" border="1"
! scope="col" | System !! Connector !! Image !! Pinout !! Transmission Protocol !! Command Strings
|-
| PC (Type 1) <ref>International Business Machines Corporation (1983): [[IBM]] Personal Computer XT Technical Reference Manual, pages D-12 to D-13.</ref>
| rowspan=3 | 5-[[pin]] [[DIN connector|DIN]]<br/>(DIN 41524)
| rowspan=3 | [[File:DIN-5 Diagram.svg|frameless|upright=0.55|alt=5-pin DIN connector]]
|1 CLK<br/>
2 DATA<br/>
3&nbsp;-RESET<br/> 
4 GND<br/>
5 +5V
| 2 start bits,<br/>8 data bits,<br/>make/break bit (keydown/keyup),<br/>1 stop bit<br/>
keyboard reset via pin 3 to ground 
| rowspan=2 | Not supported
|-
| XT (Type 2) <ref>International Business Machines Corporation (1983): IBM Personal Computer XT Technical Reference Manual, pages D-14 to D-15.</ref>
|1 CLK<br/>
2 DATA<br/>
3 N/C<br/>
4 GND<br/>
5 +5V
| 2 start [[bit]]s,<br/>8 data [[bit]]s,<br/>make/break bit (keydown/keyup),<br/>1 stop bit
keyboard reset via sequence on DATA and CLK lines
|-
| AT
|1 CLK<br/>
2 DATA<br/>
3 N/C<br/>
4 GND<br/>
5 +5V
| rowspan=2 | 1 start [[bit]],<br/>8 data,<br/>1 parity (odd),<br/>1 stop bit<br/>keyboard reset via command string
| rowspan=3 | Supported
|-
| PS/2<br/>"[[PS/2 port]]"
| 6-[[pin]] [[Mini-DIN connector|Mini-DIN]]<br/>(DIN 45322)
| [[File:MiniDIN-6 Connector Pinout.svg|frameless|upright=0.35|alt=6-pin DIN connector]]
|1 DATA<br/>
2 N/C (or [[Computer_mouse|MOUSE]] DATA)<br/>
3 GND<br/>
4 +5V<br/>
5 CLK<br/>
6 N/C (or [[Computer_mouse|MOUSE]] CLK)
|-
| Later<br/>PC compatibles
| 4-[[pin]] [[USB]]<br/>Type A connector
|[[File:USB Type-A.svg|frameless|upright=0.65|alt=USB Type A connector]]
|1 +5V<br/>
2&nbsp;Data&nbsp;−<br/>
3&nbsp;Data&nbsp;+<br/>
4&nbsp;[[Ground (electricity)|Ground]]
|sync field plus<br/>8-bit [[bytes]] as [[Network packet|packets]]<br/>(HANDSHAKE, TOKEN, DATA, Special packets),<br/>least-significant bit first. 
|}