HP 330 Service Information Manual page 131

Control
Une.
Address
DATA
Audio
1
"
r
/
Connector
Peripheral
. . -
Processor
~HP-HILl
"
/
Connector
--~
010
,23
Interface
I ~
.!Ie Battery Backed
8
Registers
'-----
Real TIme
7 ~
8
Clock
,
HPIB
"-
/
Connector
I....--
RS-232
"-
/
Connector
Figure 3-31. HP 98546A Display Compatibility Interface (Video) Block Diagram
Functional Description 115