IBM 1 Series Manual page 95

User's attachment
Timer 0
Customer clock
External gate
Runstate
External gate enable
Customersignal ground
Timer 1
Customer clock
External gate
Runstate
External gate enable
User signal ground
Frame ground
Figure 3-1. Block diagram of timer feature
Address
jumpers
(7)
Drivers
and
receivers
Timer 0
Timer 1
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{
Timer feature : I/O channel
Receivers a
| Address bus |
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Address Command |
decode decode |
TO
Timer 0 Timer 1 !
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Autoload Autoload |
and mode and mode |
registers 0 registers | |
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Drivers, |
receivers, | Data bus
and
bus < >
assembler