IBM XT 5160

lS322
QH
QH1
QG
QF
QE
QD
QC
QB
QA
-OE
D1
+5V DO
-ClR
+5V
ClK
-SE
DS
S/-P
-G
lS175
+5V
7407
lS175
PB6
PAO -----------t
PA1 -----------1
PA2 -----------t
PA3 --------~
PA4 -----------t
PA5 --------~
PA6 -----------t
PA7 -----------t
8255A-5
7407
PB7
83-Key Keyboard 4-5
-RESET --- __ ---------'
PClK -- .... -1---1
Keyboard Clock
Keyboard Data
-Reset
GND
+5V
Block Diagram
Keyboard Interface Block Diagram