rtd CMV6486DX100HR, User Manual

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Memory Map
The module addresses memory using 24 address lines. This allows a maximum of 2
24
locations, or
16 Megabytes of memory.
The table below shows how memory in the first megabyte is allocated in the system.
Memory beyond the first megabyte can be accessed in protected mode, by using EMS or a similar
memory manager. See your OS or programming language references for information on memory
managers.
First Megabyte Memory Map
FFFFFH-
F0000H BIOS in Flash EPROM
EFFFFH-
E0000H User memory space which is normally free. The Advanced
Setup screen allows this segment to be mapped into the BIOS
ROM or onto the PC/104 bus. The BIOS ROM contains Set-
up in this location.
DFFFFH-
C0000H User memory space. Usually, memory between C0000H and
C7FFFH is used for the BIOS of add-on VGA video cards.
BFFFFH-
A0000H Normally used for video RAM as follows:
CGA
EGA/VGA
Monochrome 0B8000H to 0BFFFFH
0A0000H to 0AFFFFH
0B0000H to 0B7FFFH
9FFFFH-
00502H DOS reserved memory area
00501H-
00400H BIOS data area
003FFH-
00000H Interrupt vector area