• I/O circuit
conHguration
(I)
DATAl - DATA8 (Input)
(2) DATA
STB, DATA STB
+5V
+5V
560n.
560n
"
SN74LS244
220n
SN75189
I 470PF
(3) IRT (Input)
(4)
PRIME (Input)
470n
>-------w.
......
-.----<lIO----~75189
12200PF
(5) BUSY, SELECT FAULT, ACK, PE, STATUS (Output)
+5V
~lKn
SN7406
40
.1"
