BR-Automation Automation PC 820, User Manual, Page: 147 / 252

Software • BIOS options
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147 Automation PC 820 User's Manual V 1.00
1.12 Distribution of resources
1.12.1 RAM address assignment
RAM address Address in Hex Resource
(TOM - 192 kB) – TOM
1)
1) TOM - T op o f m emory: max. installed DRAM
N.A. ACPI reclaim, MPS and NVS area
2)
2) Only if ACPI Aware OS is set to "YES" in the setup.
(TOM - 8 MB - 192 kB) – (TOM - 192 kB) N.A. VGA frame buffer
3)
3) The VGA frame buffer can be reduced to 1 MB in the setup.
1024 kB – (TOM - 8 MB - 192 kB) 100000h - N.A. Extended memory
869 kB – 1024 kB 0E0000h - 0FFFFFh Runtime BIOS
832 kB – 869 kB 0D0000h - 0DFFFFh Upper memory (available)
640 kB – 832 kB 0A0000h - 0CFFFFh Video memory and BIOS
639 kB – 640 kB 09FC00h - 09FFFFh Extended BIOS data
0 – 639 kB 000000h - 09FC00h Conventional memory
Table 110: RAM address assignment