S y s t e m m o t h e r b o a r d
LS700 HANDBOOK 3/17
Motherboard Resources
Memory Map
Address Range
(Decimal)
Address Range
(hex)
Size
Description
1024K-393216K
100000-18000000 383MB Extended memory
1008K-1024K
FC000-FFFFF
16K
Boot Block
1000K-1008K
FA000-FBFFF
8K
ESCD (Plug and Play
configuration and DMI)
996K-1000K
F9000-F9FFF
4K
Reserved for BIOS
992K-996K
F8000-F8FFF
4K
OEM Logo/Scan User Flash
928K-992K
E8000-F7FFF
64K
POST BIOS
896K - 928K
E0000 - E7FFF
32K
POST BIOS (Available as UMB)
800K-896K
C8000-DFFFF
96K
Available high DOS memory
(open to ISA and PCI bus)
640K-800K
A0000-C7FFF
160K
Video memory and BIOS
639K-640K
9FC00-9FFFF
1K
Extended BIOS Data
(moveable by memory
management software)
512K-639K
80000-9FBFF
127K
Extended conventional
memory
0K-512K
00000-7FFFF
512K
Conventional memory
I/O Map
Address (hex)
Size
Description
0000 - 000F
16 bytes
PIIX4 - DMA 1
0020 - 0021
2 bytes
PIIX4 - Interrupt Controller 1
002E - 002F
2 bytes
SuperI/O Controller Config. Reg.
0040 - 0043
4 bytes
PIIX4 - Timer 1
0048 - 004B
4 bytes
PIIX4 - Timer 2
0060
1 byte
Keyboard Controller Byte - Reset IRQ
0061
1 byte
PIIX4 - NMI, speaker control
0064
1 byte
Keyboard Controller, CMD/STAT Byte