Address - NEC PC-8201 Service Manual

(4) P I 0 8 1C55
A d d r e s s
1
*
Port
A
output
O U T 09
110 Address
I
I 1 0 0 0
I
I
1 1 0 0 1
1 0 1 1
j
I 1 0 1 0
I
I
1 0 1 1
.
-
Select
Internal commandlStatus register
General
1 1 0
Port A (PA0 t o PA71
General 110 Port B (PBO t o PB7)
General 1 1 0 Port C (PC0 t o PC51
PD7
K S 7
PD7
to
PDO
C C K
KS7
to
KSO
PD6
KS6
CDO
CDO
CCK
0
1
PD5
K S 5
LCD Chip
Select
C 2
Printer Data Port
PD4
KS4
Keyboard
C1
Clock Command Output Port
PD3
KS3
CO
Clock Data Output Port
Calendar Shift Clock
Clock
Off
Clock On
PD2
K S 2
PD1
KS1
PDQ
KSO