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Interface Card Switches
Assign each I/O interface card to be installed in the computer a unique select code by setting the
select code switches on the interface cards. Refer to the appropriate interface card reference
manuals for select code switch information and for information on any other card switches that
must be set.
Virtual Control Panel (VCP) Configuration
If you are installing a Virtual Control Panel (VCP), assign
one
of your MUX (HP 12040D), ASIC
(HP 12005B), LAN (HP 12076A), or HDLC (HP 12007B Modem or HP 12044A Direct Connect)
cards as the VCP interface card.
Set switch U1S1 on that card to ON (closed) to designate it as the VCP interface card.
Memory Configuration
Several memory configurations, using 768 Kbyte, 3 Mbyte and/or 8 Mbyte memory array cards,
can be installed in the A990. Refer to Figure 2-6 for an illustration of minimum and maximum
memory configurations. All three array sizes may be used together in the same system provided
that the largest memory card is closest to the A990 CPU card. Up to four memory array cards
can be installed in the A990 computer. Refer to Table 2-2 for the available memory array cards
and frontplane connectors. Refer to the
Memory Installation
section in this chapter for
instructions on installing memory.
Installation
2-7
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