IBM Aptiva, Руководство по оборудованию

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Specifications for the system board 105
Specifications for the system board
The system board is the main circuit board in the system
unit. It supports a variety of devices, such as the mouse
and keyboard, and provides other basic computer
functions. The system board is sometimes called the
planar or motherboard. The system board shown on
page 104 has the following parts:
VESA feature connector. Used for video and
graphics adapter cards.
Video memory module socket. If your system
board has an empty socket here, you can upgrade the
video memory to a maximum of 1MB. If your system
board has a video memory module installed in this
socket, or it does not have this socket, the system
board already has the maximum of 1MB of video
memory installed.
Specifications: 40-pin, surface mount package (SOJ),
256K x 16, 70 nanoseconds (ns), dynamic random
access memory (DRAM).
Memory module sockets (for SIMMs). Memory
modules are also called single inline memory
modules or SIMMs. You can upgrade the memory on
your system board to a maximum of 96MB. Some
system boards come with 4 or 8MB already installed.
Specifications: 72-pin; 32-bit or 36-bit; 2MB, 4MB,
8MB, 16MB, or 32MB; 70 ns; gold contacts; DRAM
Cache memory module sockets. You can install a
total of 128MB of cache memory on your system
board.
Processor socket. Holds the processor.
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Processor. You can upgrade the existing processor
to another SL Enhanced processor.
Processor jumper. You may have to reset this
jumper if you install an upgrade processor.
Local Bus IDE connector 1. Holds signal cables
that attach to drives.
Local Bus IDE connector 2. Holds signal cables
that attach to drives.
Diskette connector. Holds signal cables that
attach to drives.
Wake Up on Ring connector. Holds the Wake Up
on Ring cable attached to the internal modem.
Power supply connector. Holds the connector for
the power supply.
Power switch connector. Holds the connector
for the power switch.
Battery. Replace the battery with a 3-volt (CR2032)
lithium battery only.
Riser card connector. Holds the riser card.
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