Video Controller; Peripheral Controller - NEC LS2400 User Manual

Video Controller

The system has a high-performance SVGA subsystem that
supports the following:
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BIOS compatibility with VGA, EGA, CGA, Hercules
Graphics, and MDA.
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2 MB of Video Random Access Memory (VRAM) video
buffer.
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16-bit bus for high-speed display memory access.
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Hardware accelerated bit block transfers (BITBLT).
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Display power management system.
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Supports 72Hz refresh, non-interlaced at: 640x480,
800x600, 1024x768, or 1240x1024 resolutions.
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Displays of up to 16M colors at 640x480 and 800x600
resolutions, 64K colors at 1024x768 resolutions and 256
colors at 1280x1024 resolutions.

Peripheral Controller

The advanced integrated peripheral controller supports two
serial ports, one parallel port, diskette drive, PS/2-
compatible keyboard and mouse, and integrated Real Time
Clock (RTC). The system provides the connector interface
for each port.
Serial Ports
Both serial ports are relocatable. By default, port A
appears at the onboard DB9 connector, port B on the 10-
pin header. Each serial port can be set to one of four
different COM ports and can be enabled separately. When
enabled, each port can be programmed to generate edge- or
level-sensitive interrupts. When disabled, serial port
interrupts are available to add-in boards.
1-12 System Overview