Memory Map; Connectors And Headers; System Memory Map - Intel DX79TO Specification

2.1.2

Memory Map

Table 11 lists the system memory map.
Table 11. System Memory Map
Address Range (decimal) Address Range (hex)
1024 K - 67100672 K
960 K - 1024 K
896 K - 960 K
800 K - 896 K
640 K - 800 K
639 K - 640 K
512 K - 639 K
0 K - 512 K
2.2

Connectors and Headers

CAUTION
Only the following connectors and headers have overcurrent protection: back panel
and front panel USB, as well as IEEE 1394a.
The other internal connectors and 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 or 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.
Furthermore, improper connection of USB or 1394 header single wire connectors may
eventually overload the overcurrent protection and cause damage to the board.
This section describes the board's connectors. The connectors can be divided into
these groups:
• Back panel I/O connectors
Component-side I/O connectors and headers (see page 46)
•
100000 – FFFFFFFFFH
F0000 - FFFFF
E0000 - EFFFF
C8000 - DFFFF
A0000 - C7FFF
9FC00 - 9FFFF
80000 - 9FBFF
00000 - 7FFFF
Technical Reference
Size Description
65528 MB Extended memory
64 KB Runtime BIOS
64 KB Reserved
96 KB Potential available high DOS
memory (open to the Conventional
PCI bus). Dependent on video
adapter used.
160 KB Video memory and BIOS
1 KB Extended BIOS data (movable by
memory manager software)
127 KB Extended conventional memory
512 KB Conventional memory
43