IBM Series 1 User Manual page 110

o
USER'S AD' ACHMENT
[
<\.ddress
umpers
(7)
I
Timer 0
I
I
Customer clock
I
f
--.
External gate
I
. - -
i
~
Run state
I
r
I
External gate enable
r
Customer signal ground
Timer 1
~
I
I
Drivers
I
' - -
and
I
Receivers
t-',
Customer clock
II
CD
..,
External gate
I
I
I
I
"'l
CO
I
~ Run state
rt"
= ..,
External gate enable
(1)
I
r
I
I
W
User signal ground
t
I
I
W
Frame ground
~
I, "
TIMER FEATURE
,I
II
Address
Command
decode
decode
Timer 1
,7
II
Autoload Autoload
and Mode .--- and Mode
registers 0 registers 1
'"
~
"" 7
Timer 0 4t-- Timer 1
I/O CHANNEL
I
Receivers
I
Addres
-
]
I
I
I
I
I
Drivers,
Data bus
Receivers,
and
Bus
..
assembler
J...
I
v
I
I
I
I
c
... 'f""
· 1
"*il
~.
\0
C
..,
Cl)
Vol
•
-
OJ
t-
O
o
~
~
~.
PI
Io,Q
,.,
PI
S
o
i""h
rt
~.
S
(1)
,..,
I'"tI
CO
PI
rt"
~ ,..,
(1)