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Vector ZCB Single Board Canputer
3)
Fasten the other end of the cable with the DB-25S connector to the rear
panel of the canputer with the hardware provided.
4)
Label
the connector
"MP
Signal Connector."
·2.9 Spare chips and patch areas
Socket U26 is large enough for a 14-pin DIP.
None of the holes are
connected to anything on the board with the exception of
GND
and +5V.
There are a number of unused gates on the ZCB l::xJard which you may find
useful
to
use.
3 tri-state 8097 buffers are available.
U35: in-pin 12, out-pin 11, controlled by U28,13.
U36: in-pin 14, out-pin 13, controlled by CDSB
U45: in-pin 2, out-pin 3, controlled by GND
1 three input 74ISIO NAND gate
U9: in-pins 1,2,13, out-pin 12
1 74S04 inverter
U7: in-pin 3, out-pin 4
2 74IS04 inverters
U14: in-pin 13, out-pin 12
U43: in-pin 1, out-pin 2
3 two input 74ISOO NAND gates
U17: in-pins 10,9, out-pin 8
U17: in-pins 13,12, out-pin 11
U42: in-pins 4,5, out-pin 6
1 RS-232 level driver, DS1488
U15: in-pin 2, out-pin 3
1 RS-232 level receiver, DS1489
U16: in-pin 13, out-pin 11, control-pin 12
2-20
Rev. I-B 6/11/80
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