Epson MX-80 Technical Manual page 25

(READY)
BUSY DT1-DT8
PCI PA0-PA7
PCO AD0-AD7
STROBE
PC2
8155
PB0-PB7 PC4
— Head driver
To INT of 8049
To BUS of 8049 Head driver
REV. A
Fig. 2.6 Flow of Data and Signals through 8155
CN<
o j;
I « % t * 6
c £ <
1 V
I \ t e
I •ii
9 9 9 o Q9P9990090 Q
|i u 4 !J
iTf
I ' I
86 BI8S
CN.
tiy • --1/ -1^
t »s • h » ^ er at Jl 3^% ^ a
P00990P0000009
Fig. 2.7 8155 and Peripheral Circuits
2-12