Dell OptiPlex E1 Service Manual page 11

NOTE: If the diskette drive and tape drive are both attached to the diskette
drive controller on the system board, only the diskette drive is configured in
the System Setup program as Drive A or Drive B. The tape drive is then listed
as Not Installed (under either the Drive A or Drive B category).
The OptiPlex E1 system includes an integrated high-performance 64-bit base-
line AGP subsystem, implemented on the system board, which drives an
external SVGA monitor. The AGP contains a dedicated bus that bypasses the
PCI bus and allows for interconnection of the video subsystem directly to the
Celeron chip set for the extra-high performance required for 3D video sub-
systems. This architecture also off-loads the PCI bus, providing greater
performance for devices attached to the PCI bus.
The maximum supported resolutions include 1600 x 1200 pixels with 256 col-
ors noninterlaced and 1024 x 768 pixels with 65,536 colors noninterlaced. The
SVGA subsystem consists of the following major components:
ATI Rage II C (baseline AGP) video controller
2-MB synchronous graphics random-access memory (SGRAM) video
memory (expandable to 4 MB via a video-memory upgrade kit)
15-hole monitor port
The ATI multimedia channel (AMC) implements a local graphics bus that allows
external devices to attach directly to the graphics controller. The AMC allows
devices to transfer video stream data to the graphics controller (for example,
MPEG-2 decoding for DVD applications), or to receive video stream data from
the graphics controller to the device (for example, TV-Out circuitry), or to do
both simultaneously. Most of the video stream data transfers occur on the
AMC without congesting the PCI bus bandwidth.
The 40-pin AMC connector, shown in Figure 1-5, consists of three ports into
the graphics controller: a digital video stream (DVS) port for video input into the
graphics controller, a multimedia peripheral port (MPP) for video input and out-
put from the graphics controller, and an inter-integrated circuit (I
serial control port for controlling the attached devices. A fourth port, audio mix-
ing bus (AMB), is not supported by the system. To route mixed audio from an
AMC-compliant adapter card to the system board, CD-ROM audio cables must
be attached from the adapter card's CD-ROM audio input and CD-ROM audio
output connections to the AMC connector. See the AMC-compliant adapter
card's documentation for more information.
The OptiPlex E1 system includes a telephony application programming inter-
face (TAPI) that allows the optional system board audio to interface with a
2
C)-compatible
System Overview 1-3