Video Controller; Peripheral Controller - NEC MH4500 User Manual

No logic, termination, or resistor loads are required to connect devices to the
SCSI controller other than termination in the device at the end of the cable. The
SCSI bus is terminated on the system board with active terminators that can be
disabled.

Video Controller

The system has an onboard integrated Cirrus Logic CL-GD5480 64-bit 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 10 ns 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 100 Hz refresh, non-interlaced at 640x480, 800x600, 1024x768,
1240x1024, and 1600x1200 resolutions
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displays up to 16 million 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. Each serial port can be set to one of four
different COM ports and can be enabled separately. When disabled, serial port
interrupts are available to add-in boards.
Parallel Port
One IEEE 1284-compatible 25-pin bidirectional EPP (supporting levels 1.7 and
1.9) parallel port is provided. BIOS programming enables the parallel port and
determines the port address and interrupt. When disabled, the interrupt is
available to add-in boards.
1-10 System Overview