4.8 The Universal Unit
Many users and hardware manufacturers may wish to make prototype versions
of
optional products for the PX-S. Also construction details
of
add units are
often published in books and magazines. The Universal Unit
is
a printed cir-
cuit board in a suitable case which makes it easy for such items to be constructed.
#727
Universal Unit
4-38
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4.9 System Bus Interface
The system bus interface connector
is
provided
on
the rear panel. This connec-
tor
is
used to connect an external RAM disk unit, the Universal Unit (section)
or
other special dedicated hardware.
Fig.4.28a
The system bus cover can be removed with a screwdriver as shown below.
Fig.4-28b
4-39
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