Table of Contents
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T a b l e
Of
C o n t e n t s
FUNCTIONAL DESCRIPTIONS
P r o g r a m m a b l e P e r i p h e r a l I n t e r f a c e
K e y b o a r d I n t e r f a c e L o g i c
F l o p p y D i s k I n t e r f a c e L o g i c
P r o g r a m m a b l e I n t e r v a l T i m e r
P r o g r a m m a b l e I n t e r r u p t
A d d r e s s D e c o d i n g L o g i c
BLOCK DIAGRAM
I
NP
UT/OUTP U T PIN DESC R I PTI ONS
1/0 S i g n a l D e f i n i t i o n :
R e g i s t e r D e f i n i t i o n :
I / O MAPS
I n t e r r u p t
T i m e r
P P I / K e y b o a r d
0060
-
P o r t
0 0 6 1
-
P o r t
0 0 6 2
-
P o r t
0063-0064
-
P l a n a r C o n t r o l
A
B
C
P o r t n o t u s e d
0 0 6 5
-
P l a n a r R e g i s t e r R e a d / W r i t e
037C
-
N o n - v o l a t i l e
memory
w r i t e
o n l y
0 3 F 1
-
FDC Mode C o n t r o l
03F2
-
FDC
D i g i t a l O u t p u t R e g i s t e r
03F4
-
FDC c h i p
s e l e c t
03F5
-
FDC c h i p
s e l e c t
03F7
-
FDC Data R a t e S e l e c t i o n
S y s t e m C o n f i g u r a t i o n R e g i s t e r
FFEB
-
Non IBM C o m p a t i b l e R e a d / W r i t e
Non V o l a t i l e Memory
Access
F l o p p y D i s k C o n t r o l
ELECTRICAL SPECIFICATIONS
KEYBOARD TIMING SPECIFICATIONS
FLOPPY DISK TIMING SPECIFICATIONS
ADDRESS PORT EQUATIONS
1
1
1
1
2
2
2
3
4
10
1 0
1 1
1 1
11
11
1 1
1 1
1 2
1 2
1 2
1 2
1 2
1 2
1 3
1 3
13
1 3
1 3
1 3
14
14
1 5
1 6
18
1 9
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