NEC Express5800/180Rb-7, Руководство пользователя

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1-14 System Overview
Peripheral Ports
Super I/O Chip
The 37C937 Super I/O device supports two serial ports, one parallel port, diskette drive,
and PS/2-compatible keyboard and mouse. The system
provides the connector interface
for each port.
Serial Ports
Both serial ports are relocatable. By default, port A is physically the left connector (as
you look at the back of the system — see Figure 1-3. Chassis Rear View), port B the
right connector. Each serial port can be set to one of four different COMx ports, and
each 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.
Parallel Port
The 25/15-pin connector stacks the parallel port over the VGA. The 37C937 provides
one IEEE 1284-compatible 25-pin bi-directional EPP (supporting levels 1.7 and 1.9).
BIOS programming of the Super I/O registers enables the parallel port and determines
the port address and interrupt. When disabled, the interrupt is available to add-in
boards.
Add-in Board Slots
The I/O carrier has ten 64-bit PCI buses (nine available) contained in four PCI
segments. PCI slot 10 contains the system LAN controller board.
!
PCI-A provides for PCI slots 1 and 2 (33 MHz), dual-channel LVDS SCSI
controller, video, and PIIX4E.

The PIIX4E controls communications to IDE, onboard ISA, USB, and Super I/O
for handling the keyboard, mouse, diskette drive, parallel port, and serial ports.
!
PCI-B provides for PCI slots 3 through 6 (33 MHz).
!
PCI-C provides for slots 7 and 8 (two of the 66 MHz, 3.3 V slots).
!
PCI-D provides for slots 9 and 10 (the two other 66 MHz, 3.3 V slots).
Video
The onboard, integrated Cirrus Logic CL-GD5446 64-bit VGA chip contains an SVGA
controller that is fully compatible with these video standards: CGA, EGA, Hercules
†
Graphics, MDA, and VGA. The standard system configuration comes with 2 MB of 10
ns onboard video memory. The video controller supports pixel resolutions of up to
1600 x 1200 and up to 16.7 M colors.