Software • BIOS options
250
Automation PC 810 with GM45 CPU board user's manual V1.28
1.11 Distribution of resources
1.11.1 RAM address assignment
RAM address
Address in hexadecimal
Resource
(TOM - 384 kB) – TOM
1)
N.A.
ACPI reclaim, MPS and NVS area
2)
(TOM - 128 MB - 384 kB) – (TOM - 384 kB)
N.A.
VGA frame buffer
3)
1024 kB – (TOM - 128 MB - 384 kB)
100000h - N.A.
Extended memory
869kB – 1024 kB
0E0000h - 0FFFFFh
Runtime BIOS
832kB – 869 kB
0D0000h - 0DFFFFh
Upper memory
640kB – 832 kB
0A0000h - 0CFFFFh
Video memory and BIOS
639kB – 640 kB
09FC00h - 09FFFFh
Extended BIOS data
0 – 639 kB
000000h - 09FC00h
Conventional memory
Table 221: RAM address assignment
1)
TOM = Top of Memory: Max. installed DRAM
2)
Only if ACPI Aware OS is set to "YES" in the setup.
3)
The VGA frame buffer can be reduced to 32 MB in the setup.
1.11.2 I/O address assignments
I/O address
Resource
0000h - 00FFh
Motherboard resources
0170h - 0177h
Secondary IDE channel
01F0h - 01F7h
Primary IDE channel
0238h - 023Fh
COM5
0278h - 027Fh
Hardware Security Key (LPT2)
02E8h - 02EFh
COM4
02F8h - 02FFh
COM2
0376h - 0376h
Secondary IDE channel command port
0377h - 0377h
Secondary IDE channel status port
0378h - 037Fh
Hardware Security Key (LPT1)
0384h - 0385h
CAN controller
03B0h - 03DFh
Video system
03E8h - 03EFh
COM3
03F6h - 03F6h
Primary IDE channel command port
03F7h - 03F7h
Primary IDE channel status port
03F8h - 03FFh
COM1
04D0h - 04D1h
Motherboard resources
0500h - 053Fh
Motherboard resources
0800h - 087Fh
Motherboard resources
0A00h - 0A7Fh
Motherboard resources
0CF8h - 0CFBh
PCI config address register
0CFCh - 0CFFh
PCI config data register
0D00h - FFFFh
PCI / PCI Express bus
1)
4100h - 417Fh
MTCX
FF00h - FF07h
IDE bus master register
Table 222: I/O address assignment
1)
The BIOS assigns the PCI and PCI Express Bus I/O resources from FFF0h downward. Devices that are not compatible with PnP/PCI/PCI Express cannot
use the I/O resources in this area.