I/O Bus
The lower part of the controller board contains the I/O bus to
gether with seven user-accessible connectors. These connectors
are identified on the board as J1 through J7 (reading from left to
right), and correspond to the seven slots (numbers 1 through 7) at
the rear of the cabinet.
Position J1 is reserved for the connection of any one of the
memory expansion modules (K200, K202, K208).
Position J7 is reserved for the connection of either the diag
nostic module (K220), or the customer-installable 16-bit processor
module (K231).
Positions J2 through J6 are the general purpose slots for the
connection of the peripheral adapter and other interfaces to the
computer. These five positions are identical, and Figure 2.2
defines the type of connector, while the pin assignments are
shown in Figure 2.3.
2-2
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