1-24. TEST CONSOLE TEST BENCH 2A2 (cont)
(c) Logic and timing CCA A3 (slot 300) has three main functions:
It provides buffer amplification for the remote or local address and
data bits received from the remote/local CCA.
It selects either programmed data bits or control panel data bits.
It generates the flag signal for output to the computer. The flag
notifies the computer whether the multiprogrammer system is busy processing the last
programmed task or it is ready for the next one.
(d) Unit select CCA A5 (slot 500) examines specific bits of the programed
data to determine if the data represents a control word or a data or address word. If
the unit select CCA determines that the programmed word is a control word, it decodes
and stores the unit selection.
The multiprogrammer is assigned unit number zero and
the extender is unit number one.
(e) Voltage regulator CCA A6 (slot 600) supplies operating voltage for the
two digital-to-analog CCAs.
It contains isolated +15 vdc and -15 vdc regulated
(f) Digital input CCAs A4 (slots 400 thru 405) accept data from the elec-
tronics drawer assembly and output data and status to the computer. These CCAs
contain gate and flag circuits for exchange of control signals with the electronics
(g) Digital output CCAs A4 (slots 406 thru 410) provide programmed outputs
to the electronics drawer assembly.
These CCAs contain gate and flag circuits for
exchange of control signals with the electronics drawer assembly.
(h) Digital to analog CCAs A4 (slots 412, 413) provide solid-state output
switches to control relay coils using an external dc power source.
Each output cir-
cuit is rated at up to 30 vdc and 40 milliamperes.
(i) The buffered data and addressed bits, unit selection lines, and mode
control and timing signals are conveyed to output connector J2 by adapter CCA A8. A
cable is connected from output connector J2 of the multiprogrammer to input connector
J1 of the extender.
In the other direction, the input data and extender control sig-
nals are received at connector J2 from the extender.
(3) Multiprogrammer Extender Assembly
(a) Data and control signals are routed through adapter A7 to the back-plane
wiring of interconnect CCA A9.
Extender input CCA A1 (slot 100), I/0 transfer CCA A2
(slot 200), and logic and timing CCA A3 (slot 300) function the same as in the multi-
except there are no local selection functions.
(b) Output readback CCAs A4 (slots 400 thru 403, 408, and 409) provide relay
and flag signals, and input data lines that can be read by the computer
which indicate the relay coil voltage status.