IBM 6580 User Manual

Character structure
The dots on the display screen of the
Large Display Module are smaller in
size and larger in number than the
dots on the screen of the 25-Line Dis-
play Module. 800 columns and 1056
rows of dots are presented on the
Large Display Module screen. The size
of a character box is 8 x 16 dots.
Figure 4-5 summarizes the size of
characters within the character boxes.
Character
Dot Matrix
Upper Case
6 x 11
or 7
Lower
Case
6 x
8
(Ascender)
Lower Case
6 x 9
(Descender)
Figure
4-5. Character Size
Large Display Module
Low
Voltage
Display
Analog
Card
LV3
8
x 11
Large Display
AC Cable
Figure 4-6. High Voltage Power Supply
Operating Voltages
The Large Display has its own power
supplies. The low voltage power sup-
ply provides +32 VDC, +5 VDC and -5
VDC to the analog card to operate the
Large Display Module.
The analog card supplies voltage to
the High Voltage Power Supply (HVPS)
which provides power for the anode.
The High Voltage Power Supply is a
modular, DC to DC converter-type power
supply. (See Figure 4-6.)
High Voltage Power Supply
Chapter 4. Large Display 4-5

IBM 6580 Specifications

General

Brand	IBM
Model	6580
Category	Desktop
Language	English