ps2 splitter cable

[PeterOz]

The keyboard and auxiliary device signals are driven by open-collector drivers pulled to 5Vdc through a pull-up resistor.

[reg]

5v and ov are present on pin 3 and 4 ( common ) on the keyboard and mouse skts
it seems that the spare pins ( 6&2) are not utilised to create the ’ one socket implementation ’
ie pins 5 & 1 is the normal mouse and keyboard configuration for 2 ports
but using one port . . pins 2 and 6 should be the ’ split wiring ’ to the keyboard side of the skt
thus utilising 6 pins of the mini din plug . . £ to a penny pins 2 and 6 on the motherboard skt
go nowhere . . .this could be a mis sell issue for motherboard manufacturers that are using a
legacy issue to sell motherboards

[PeterOz]

I have checked another wiring diagram and it comes up the same

[reg]

theres nothing wrong with the diagram . . it seems like its a bodged motherboard
boasting support for ps2 mouse and keyboard when it doesn’t ( not at the same time )

[PeterOz]

Do you have another keyboard to test with?
Note that IBM PC and PC XT keyboards use a different unidirectional protocol with the same DIN connector as AT keyboards, so though a PC or XT keyboard can be connected to PS/2 port using a wiring adapter intended for an AT keyboard, the earlier keyboard will not work with the PS/2 port. (At least, it cannot work with normal PS/2 keyboard driver software, including the system BIOS keyboard driver.)

[reg]

the keyboard works with the splitter but only in the ’ mouse ’ skt ( pin 1&5 data/clock )
the mouse works with the spiltter but only with the ’ mouse ’ skt ( pin 1&5 data/clock )
the keyboard wll not work with the spitter in the ’ keyboard ’ skt ( pin 2&6 data/clock )
the mouse wll not work with the spitter in the ’ keyboard ’ skt ( pin 2&6 data/clock )

so the ps2 dual socket pins 2&6 in the motherboard are defunct
unless they need to be acivated ( LMFAO!! )

[PeterOz]

By my understanding the keyboard should not work if plugged into the mouse side
I could be and most likely wrong.

Not the solution you want BUT if you plug the mouse in and use a usb keyboard do you get rid of the latency issue?
Do you reboot every time you change mouse/keyboard over in the connector ? because PS2 is not hot swap

[reg]

the keyboard works normally via the mouse skt which utilises pin 1&5 ( data clock ) on the ps2 splitter
the mouse works normally via the mouse skt which utilises pin 1&5 ( data clock ) on the ps2 splitter
neither the keyboard or mouse work on the ’ keyboard ’ side of the splitter which uses pins 2&6
so pins 2&6 are not used on the ps2 dual port for whatever reason
this is a miss sell by the manufacturer luring legacy users to a function that doesn’t work

[reg]

i dont want to use usb
i want a solution to utilise legacy ps2 advertised by the motherboard manufacturers
who choose to stick a bogus dual ps2 socket that is not fit for purpose

[PeterOz]

Try this one

1	2	-
2	-	2
3	3	3
4	4	4
5	6	-
6	-	6

From here PS/2 Keyboard (Gateway) Y adapter pinout and wiring @ old.pinouts.ru

[reg]

thanks for the links
theres no point in using pins 2/6 on the keyboard/mouse since they are not used ( kb and mouse should read 1/5 not 2/6 )
both keyboard and mouse are wired
1=data
5=clock
3/4 power ( 5v)
whats supposed to happen is the duel port i/p uses pins 2/6 (which are redundant for a single skt ) just for the mouse data/clock
thus only needing 1 skt and a split lead ( which by the way costs 5 times as much as an extra skt would on the motherboard )
i am beginning to think this port ( on this motherboard ) is for either / or . . . not both

[PeterOz]

Have a look at this.
I belled out a cable I found - PDF attached

[reg]

the female pin numbering is a mirror of the male
2&6 are not used

[PeterOz]

Yes - I was showing that the wiring from an actual cable to make sure the original diagram I found matched

[reg]

[ATTACH type=“full” alt=“PS2 SPLITTER.JPG”]8616[/ATTACH]
this drawing has been derived from available information on the internet . .if there are any mistakes please post