B&R Automation PC 620, User Manual

Page: 324 / 594

324
Software • BIOS options
Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
1.11 Distribution of resources
1.11.1 RAM address assignment
1.11.2 DMA channel assignment
RAM address Resource
000000h - 0003FFh Interrupt vectors
000400h - 09FBFFh MS-DOS program area
09FC00h - 09FFFFh Advanced BIOS data
0A0000h - 0CFFFFh VGA BIOS and memory
0D0000h - 0DFFFFh Available
0E0000h - 0FFFFFh System BIOS (AMI)
100000h - (TOM
1)
-8MB-192kB)
1) T.O.M. = Top of memory = Max. installed DRAM.
SDRAM
(TOM-8MB-192kB) - (TOM-192kB) VGA frame buffer
2)
2) The VGA frame buffer can be reduced to 1 MB in the setup.
(TOM-192kB) - TOM ACPI reclaim, MPS and NVS area
3)
3) Only if ACPI Aware OS is set to YES in the setup.
Table 215: RAM address assignment
DMA channel Resource
0 Available
1 Available
2 Floppy disk drive (FDC)
3 LPT (ECP)
1)
1) Not available if the parallel port is not used in ECP mode.
4 Reserved (Cascade DMA Controller)
5 Available
6 Available
7 Available
Table 216: DMA channel assignment