8255A Ppi I/O Map - Sanyo MBC-550 Series User Manual

8255A PPI I/O Map
Simplified A/D converter x 4
P A 7
P A 6
P A 5
P A 4
A/D # 3
A/D flag
A/D # 2
C
A/D # 1
o
A/D # 0
c
8
o
PA 3
PA 2
PA 1
PAO
K
I
!
( bO to b5^
Non­
inversion
|l
A/D trigger
Printer &
joy stick
\
PB
* Inverted output *
o
8-bit parallel
output
c
8
o
■O
n
5
8259A IR4
PC 7
.5
8
P C 6
PC 5
P C 4
Select
Paper empty
BUSY/READY
S
Printer
status
c
<3
O
p
—
Printer data strobe
Side select
P C 3
P C 2
PC 1
PCO
FDD
selector
Drive select
5-31