Human
Interface
Card
General
Description
A 98651-66530 Hurnan Interface
Card
is
an
accessory used in
computers
having
the
98561-66519
processor. As
the
-66519 processor does
not
have any interfaces,
this
card
provides
the
following
features:
•
HP-HIL
Interface
•
HP-IB
Interface
• RS-232 Interface
• Speaker
Output
Figure 3-13 is a block diagram of
the
human
interface card. Refer
to
this
diagram
for functional
descriptions.
Control
Unes
Address
DATA
I
I
010
23
Interface
&:
8
Registers
Peripheral
..------
Processor
8
I
HPIB
"--
RS-232
--1
Audio
I
"-
I
/
Connector
~HP-HIL:
"-
/
Connector
Battery
Backed
-----
Real
Time
Clock
"-
/
Connector
"-
/
Connector
Figure 3-13. Human Interface Card Block Diagram
Functional
Description
Each of
the
above functions use virtually
the
same electronics as
the
interface circuits on proces-
sors for
the
same functions.
The
major
difference
is
the
RS-232 connector which is 9-pin
instead
of 25-pin.
Functional Description
65
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