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1-16 Technical Information
Memory Map
The system supports system and video memory shadowing, both controlled through com-
plementary metal oxide semiconductor (CMOS settings). The system supports BIOS as a
cacheable area with write protection. Table 1-2 lists the system's memory map.
Table 1-2 Memory Map
Memory Space
Size
Function
000000-0002FFh
768 bytes
BIOS Interrupt Vector Table
000300-0003FFh
256 bytes
BIOS Stack Area
000400-0004FFh
256 bytes
BIOS Data Area
000500-09FFFFh
639 KB
Application Memory (used by the Operating
System, device drivers, TSRs, and all DOS
applications)
0A0000-0AFFFFh
64 KB
Video Buffer (EGA and VGA)
0B0000-0B7FFFh
32 KB
Video buffer (monochrome, CGA color, VGA
monochrome)
0B8000-0BFFFFh
32 KB
Video Buffer (CGA, EGA color, and VGA color)
0C0000-0CBFFFh
48 KB
Video ROM (EGA and VGA)
0CC000-0CFFFFh
16 KB
Unused, (Reserved for Adapter ROMs and other
devices requiring ROMs)
0D0000-0DFFFFh
64 KB
Used by Adapter ROMs (i.e., network controllers,
hard disk controllers, SCSI host adapters)
0E0000-0EFFFFh
64 KB
Used by System ROM adapters (i.e., network
controllers with boot capability)
0F0000-0FFFFFh
64 KB
System AMIBIOS (includes Setup and hard disk
drive utilities)
100000-1FFFFFFh
32 MB
Built-in Extended Memory
2000000-5FFFFFFh
64 MB
Extended Memory
SYSTEM VIDEO
The system's LCD operates using the NeoMagic NMG4 VGA Controller. Video signals
travel from the controller through the system's 15-pin D-SUB connector using 5 volts.
System video integrates a PCI-bus interface. The system ships with 2 MB Video RAM
(VRAM). It supports video modes up to 1024 x 768 with 64K colors in LCD mode.
See Appendix B for a list of Video modes.