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Add connector pinouts

master
tmk 2014-02-10 23:49:57 +09:00
parent 902afcc509
commit 47d812bfd6
1 changed files with 16 additions and 3 deletions
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19
converter/ibm4704_usb/4704.txt
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@ -16,7 +16,6 @@ http://ed-thelen.org/comp-hist/IBM-ProdAnn/4700.pdf
4704 Keyboard Protocol 4704 Keyboard Protocol
====================== ======================
On powering up the keyboard sends keyboard id; A3h for 6019284(62-key), for example. On powering up the keyboard sends keyboard id; A3h for 6019284(62-key), for example.
@ -24,6 +23,22 @@ After that firmware enters FC command mode and waits for parameter data from hos
so that it doesn't send any scancode until you send 'FF'(End of FC command). so that it doesn't send any scancode until you send 'FF'(End of FC command).
Connector
---------
Keyboard Plug from front
DSUB-9
-------------
\ N 2 3 4 5 /
\ N N N N /
---------
2 GND
3 VCC 5V
4 DATA
5 CLOCK
N No connection/No pin.
Keyboard to Host Keyboard to Host
---------------- ----------------
Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part. Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part.
@ -40,7 +55,6 @@ Timing: Host reads bit while Clock is hi.
Stop bit: Keyboard pulls down Data line to lo after 9th clock. Stop bit: Keyboard pulls down Data line to lo after 9th clock.
Host to Keyboard Host to Keyboard
---------------- ----------------
Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part. Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part.
@ -60,7 +74,6 @@ Timing: After Request keyboard pull up Data and down Clock line to low for s
Stop bit: Host releases or pulls up Data line to hi after 9th clock and waits for keybaord pull down the line to lo. Stop bit: Host releases or pulls up Data line to hi after 9th clock and waits for keybaord pull down the line to lo.
Scancodes Scancodes
--------- ---------
Keyboard doesn't send Break code for all keys except for Alt by default. Keyboard doesn't send Break code for all keys except for Alt by default.