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Each, socket contains values of 4 lines and their complements.
Socket E5 controls lines AO through A3.
lines A4 through A 7 .
a 1 on an address line, that line should be directly
connected to the NAND input via a short wire jumper on the
socket header.
Conversely, if the user selected address
presents a 0 on an address line, the inverted address
line value should be connected to the NAND.
It is suggested that for lines jumpered to enable on
a 1 value that the jumpers be placed diagonally across
the socket (i.e., Pin 1 to Pin 15) and for lines jumpered
for a 0 value, the jumper be placed straight across the
header (i.e.. Pin 2 to Pin 15).
easy visual determination of the selected address, for l's
appear as diagonals and 0 1s as horizontals.
of a correctly jumpered socket pair for the address C4 hex
or 304 octal is shown above.
If desired, very frequent address changes may be easily
implemented through the exchange of an 8 pole DIP switch
for each socket.
All 8 of the NAND inputs should be jumpered to respond
to either a 1 or a 0.
will appear to act as a 1, open inputs are very susceptible
to noise pulses.
If the user-selected address presents
This convention allows
While any input left unconnected
Board Addressing
Revision 3
Socket E4 controls
An example
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