1-6 Technical Information
The Flash ROM allows the system and video BIOS to be upgraded with the BIOS Update
utility, without removing the ROM (see Section 2 for further information on the BIOS
Update utility). The Flash ROM supports the reprogramming of the system BIOS and the
video BIOS.
The system memory map is shown in Table 1-3.
Table 1-3 System Memory Map
Memory Space
Size
Function
FFF80000-FFFFFFFF
512 KB
BIOS ROM
04000000-07FFFFFF
64 MB
L2 cache (Non-Cacheable with less than 512 KB
SRAM)
L1 cache (Cacheable)
01000000-03FFFFFF
48 MB
Always cachable
00F00000-00FFFFFF
1 MB
Optional memory space gap
00100000-00EFFFFF
14 MB
Cachable
000F0000-000FFFFF
64 KB
System BIOS (Shadowed in DRAM)
000C8000-000EFFFF
160 KB
Expansion region (Shadowed in DRAM)
000C0000-000C7FFF
32 KB
Video BIOS (Shadowed in DRAM)
000A0000-000BFFFF
128 KB
Video Buffer (SMM space Non-Cacheable)
00080000-0009FFFF
128 KB
Optional memory space gap (DOS Apps)
00000000-0007FFFF
512 KB
DOS applications (No read/write protect) (Always
cacheable)
Power Management
Each system incorporates power management features that lower power consumption when
there is no activity detected from the keyboard, mouse, diskette drive, CD-ROM reader, or
hard disk drive after a predefined period of time. As soon as activity is detected the system
resumes where it left off.
With Power Management enabled (shipped enabled), the system automatically activates the
power-saving features and enters a suspend mode whenever inactivity is sensed.
I/O Addressing
The processor communicates with I/O devices by I/O mapping. The hexadecimal (hex)
addresses of I/O devices are listed in Table 1-4.
