Description - IBM RT Series Hardware Reference Manual

Description
The IBM Enhanced Color Display is an advanced color display
capable of operating in two separate modes. Mode 1 is a 16 color
640 by 200 overscan mode with a horizontal scan frequency of
15.75 kHz. Mode 2 is a 64 color 640 by 350 mode with a
horizontal scan frequency of 21.8 kHz. Both modes are
non-interlaced. The monitor determines which mode to operate in
by decoding the vertical sync polarity.
The IBM Enhanced Color Display attaches to the system unit by
a signal cable that is approximately 3.5 feet (1.07 meters) in
length. This signal cable provides a direct-drive interface from
the IBM Personal Computer.
A second cable provides ac power to the display from a standard
wall outlet. The display has its own power control and indicator.
Three models are provided. Model 001 is for northern hemisphere
operation and operates on 120 volts 50/60 Hz. Model 002 is for
northern hemisphere operation and operates on 220/240 volts
50/60 Hz. Model 003 is for southern hemisphere operation and
operates on 220/240 volts 50/60 Hz.
The display has a 13-inch, high-contrast CRT. The CRT and
analog circuits are packaged in an enclosure so the display may sit
either on top of the system unit or on a nearby tabletop or desk.
Front panel controls and indicators include: Power-On control,
Power-On indicator, Brightness and Contrast controls.
Additional controls on the rear of the display are: Vertical Size 1
and Vertical Size 2. There are two service controls on the rear of
the unit, black level adjustment and contrast default value
adjustment.
IBM Enhanced Color Display 1