SECTION
2.
PROCESSOR
BOARD
The cpu
of
the processor board
is
the Intel 80286 microprocessor.
Other components
of
this board are:
*
16MHz system clock
*
three programmable timers
*
seven
backplane
I/O
slots
*
19-1evel
interrupt controller
*
7-channel
DMA
,,.-
*
CMOS
real-time clock plus RAM chip
that
operates
with
battery back-up when the system
is
off
or
during a
power
failure
*
keyboard and input device controller
*
speaker attachment
*
flexible disc controller subsystem
A processor extension card
for
memory
is
attached
to
the
processor board
of
the
HP
Vectra
PC
through connector
P5.
The fo!lowing illustration
is
a layout
of
the
processor board
(HP
assembly number 45935-60001). Included in the illustration are
the components and the connectors.
Processor Board 7
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