NEC VERSA SXI, Инструкция по обслуживанию и справочник

Страница: 90 / 104

9-8 Specifications
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.
System 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 Applications Memory (used by the
OS, 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 64 KB Video ROM (EGA and VGA)
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)
0F0000h-0FFFFFh 64 KB System AMIBIOS (includes Setup
and hard disk drive utilities)
100000h-1FFFFFF 32 MB Built-In Extended Memory
2000000-5FFFFFF up to 256 MB Extended Memory