Memory Map - NEC VERSA LX Manual

Memory Map

The system supports system and video shadowing, both controlled
through complementary metal oxide semiconductor (CMOS). The
system supports BIOS as a cacheable area with write protection. The
following table shows the system's memory map.
Memory Space
000000-0002FFh
000300-0003FFh
000400-0004FFh
000500-09FFFFh
0A0000-0AFFFFh
0B0000-0B7FFFh
0B8000-0BFFFFh
0C0000-0CBFFFh
0D0000-0DFFFFh
0E0000-0EFFFFh
0F0000h-0FFFFFh
100000h-1FFFFFF
2000000-5FFFFFF
System Memory Map
Size
768 bytes
256 bytes
256 bytes
639 KB
64 KB
32 KB
32 KB
64 KB
64 KB
64 KB
64 KB
32 MB
up to 256 MB
Function
BIOS Interrupt Vector Table
BIOS Stack Area
BIOS Data Area
Applications Memory (used by the
OS, device drivers, TSRs, and all
DOS applications
Video Buffer (EGA and VGA)
Video Buffer (monochrome, CGA
color, VGA monochrome)
Video Buffer (CGA, EGA color, and
VGA color)
Video ROM (EGA and VGA)
Used by Adapter ROMs (i.e.,
network controllers, hard disk
controllers, SCSI host adapters)
Used by System ROM adapters (i.e.,
network controllers with boot
capability)
System AMIBIOS (includes Setup
and hard disk drive utilities)
Built-In Extended Memory
Extended Memory
Specifications B-9