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1·2 Product Info,matlon
Integ,,, Personal Compute,
The I/O capabilities of the computer can be expanded by adding up to two HP 82904A Bus Expanders
to the system. Each bus expander provides five ports, but requires one of the computer I/O ports,
giving a maximum of 10 I/O ports.
The computer has three major printed-circuit assemblies (PCAs): the logic A PCA, the logic B PCA,
and the power supply PCA.
The logic A PCA contains the CPU, RAM, MMU (memory-management unit), and keyboard control-
ler. The plug-in ROM assembly plugs into the ROM receptacle on the logic A PCA.
The logic B PCA contains the clock, the speaker. the HP-IB interface, the power supply for the print
head, and the control
circuitry
for the disc drive, display, and printer.
The power supply provides +5V,
+
12V, -12V, +15V, and + 18V outputs.
The major system assemblies and I/O devices are identified in figures 1-1, 1-2, and 1-3.
Prlnt.r _ _ _ _ _ _ _
~
DI ..... V
ROIl
Door
-------
~
Disc
.....L __ --..... ------
Driv.
Figur. 1·1. Integral Personal Computer-Front View
#; ....... .
~---------~-------~.-~-
..
--'-~--. ~:.-.-----------,-
•
,----.- ·-------(·.1
I
.. ___ . ______ . ___ J
"P.,.-----·o-.---~------
. . . .
T
I:. ____________
:..!..J. ....
----:!!t.
Figur. 1·2. Integra. Persona. Computer-Rear View
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