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Overview of BIOS Features

Table 11 lists the system memory map.

Table 11. System Memory Map

Address Range

(decimal)

Address Range

(hex)

Size

Description

1024 K - 8388608 K 100000 - 1FFFFFFFF 8191 MB Extended memory

960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS

896 K - 960 K E0000 - EFFFF 64 KB Reserved

800 K - 896 K C8000 - DFFFF 96 KB Potential available high DOS

memory (open to the PCI bus).

Dependent on video adapter used.

640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS

639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by

memory manager software)

512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory

0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory

2.2 Connectors and Headers

CAUTION

Only the following connectors and headers have overcurrent protection: Back panel

and front panel USB.

The other internal connectors/headers are not overcurrent protected and should

connect only to devices inside the computer’s chassis, such as fans and internal

peripherals. Do not use these connectors/headers to power devices external to the

computer’s chassis. A fault in the load presented by the external devices could cause

damage to the computer, the power cable, and the external devices themselves.



NOTE

Computer systems that have an unshielded cable attached to a USB port may not

meet FCC Class B requirements, even if no device is attached to the cable. Use

shielded cable that meets the requirements for full-speed devices.

This section describes the board’s connectors and headers. The connectors and

headers can be divided into these groups:

• Back panel I/O connectors (see page 44)

• Component-side connectors and headers (see page 45)

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American Audio Q-MX1 Spezifikationen Seite 43