The 6-pin DIN connector looks like (from outside):
In
detail, the
1571
serial bus supports the new FAST serial communication
as
well
as
standard (SLOW) serial communication.
The important difference between the FAST serial bus and the SLOW serial bus
is
the incorporation
of
the hardware controlled lines for the CLOCK and DATA lines. Fast
serial communication
is
transparent to any peripheral connected
to
the serial bus 'that does
not contain the necessary hardware or software
to
talk
at
fast speed.
To remain compatible with the SLOW serial bus all bytes sent under attention are
sent slow.
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