Dell Inspiron 2100, Service Manual

Page: 24 / 73

System Overview 1-7
Video Controller
The video subsystem is built into the system board and consists of a high-speed,
high-resolution VGA-compatible video subsystem. The video controller is con-
nected to the PCI local bus. The standard video subsystem contains 1 MB of
video memory (the video memory size is not upgradable).
Maximum noninterlaced resolutions are 640 x 480 pixels with 16.7 million col-
ors or 800 x 600 pixels with 65,536 colors.
Maximum interlaced resolution is 1024 x 768 pixels with 256 colors.
Integrated SCSI Controller
A single-integrated SCSI controller provides an ultra (fast-20) wide, SCSI inter-
face through a 68-pin connector on the system board. The integrated SCSI
controller attaches to the PCI bus to provide a high-performance SCSI bus.
The integrated SCSI controller provides control for the three SCSI hard-disk
drives in the SCSI hard-disk drive cage, the CD-ROM drive in the middle
externally-accessible drive bay and a SCSI drive installed in the lower
externally-accessible drive bay.
SCSI Hard-Disk Drives
A SCSI hard-disk drive cage is located under the externally-accessible drive bays at
the front of the computer (see Figure 1-4). The SCSI hard-drive cage can contain up
to three, 1.6-inch-high, SCSI hard-disk drives (either fast/wide or ultra [fast-20]
wide). These SCSI hard-disk drives mount vertically. The SCSI hard-disk drive bays
are populated from left to right (facing the front of the computer), so that the SCSI
terminator jumper is accessible on the leftmost drive installed (last drive on the SCSI
channel).
NOTE: The externally-accessible drive bays at the front of the computer are
normally used for diskette drives, CD-ROM drives, and/or tape drives. Hard-
disk drives should be installed in the SCSI hard-disk drive cage. For detailed
information about installing externally-accessible drives, see Chapter 8, “Installing
Drives in the External Bays,” in the User’s Guide. For detailed information about
installing SCSI hard-disk drives, see Chapter 9, “Installing Drives in the Internal
Bays,” in the User’s Guide.
SCSI Configuration Guidelines
Although SCSI devices are installed essentially the same way as other devices,
their configuration requirements are different. To configure your SCSI sub-
system, follow the general guidelines offered in the following subsections.