IBM RT Series Hardware Reference Manual page 19

Description
The Advanced Monochrome Graphics Display is a high resolution monochrome display which
supports an addressable format of 720 dots horizontally by 512 scan lines vertically. The display
screen is interlaced at a refresh rate of 46/92 Hz.
The Advanced Monochrome Graphics Display attaches to the RT PC system unit through two
cables approximately 2.5 meters (8.25 feet) in length. One cable provides the direct-drive signal
interface to the RT PC Advanced Monochrome Graphics Display Adapter. The second cable
provides ac power to the display from the system unit. This arrangement allows the system unit
power switch to also control the power to the display and reduces the number of electrical wall
outlets required to power the system. The display operates on 120 vac, 60 Hz power line voltage.
The display uses a 12-inch (diagonal) high contrast monochrome CRT. The CRT and associated
analog circuits of the display are packaged in an enclosure that allows the display to sit either on top
of the Model 10 system unit or on a nearby tabletop or desk with other R T PC system units. The
display enclosure includes a tilt and swivel base which allows the display screen to be adjusted by
the user for the best viewing conditions. The display has only one operator control which provides
two functions: brightness control and raster switch (used only to verify operation of the display).
Operating Characteristics
Operating characteristics of the display are as follows:
Screen
Etched surface for reduced glare
720 dots horizontal by 512 scan lines vertical.
Video Signal
Two-level (on and off) video
• Maximum bandwidth of approx. 25.7 Mhz
Compatible with standard TTL driver.
Advanced Monochrome Graphics Display 1