Control Data Corporation INFORMATION SYSTEMS TERMINAL II Hardware Maintenance Manual page 87

CLOCK (4 MHz)
REFERENCE ONLY
-I
250
r-
ADDRESS
'-------------11-------' ..... - -
DATA (OUTPUT)
EXTERNAL WRITE
OUTPUT
-I
250
r-
------.
EXTERNAL READ
DATA (INPUT)
1
1 - - - 7 5 0 - -......
--~I
_ - - - I
1--_-.1_1--_>_0_---,
1
GATE EXT READY
+I
1.->0
------~~~77~~~
EXTERNAL READY
NOTE: ALL TIMES IN NANOSECONDS UNLESS STATED OTHERWISE..
Figure 4-14. External Input or Output Timing
(With Extra Wait States)
Terminal Identification
03341
There are 16 selection jumpers on the controller board that
have been individually opened or left shunted, as required,
to establish a unique l6-bit terminal identification (10)
code. Under program control, this 10 code can be read and
transmitted to the host. This 10 code is factory set only.
Programming
All the I/O instructions whose address have bit 2 5 set
route through the parallel channel interface. The actual
addressing/function codes (lower 5 bits of address code),
as well as the meaning of the information transferred is
device dependent.
82100083 B 4-25
I