System Memory Map

02000000h16MB (Maximum system memory on SIMMs)

Extended memory

OO1OOOOOh1MB

System BIOS ROM: 64KB*

c

000F0000h

VGA BIOS: 32KB*

c

000E0000h

000D0000h

Available

t

Available

000C0000h

Video memory: 64KB (MDA or CGA)

c

000B0000h

Video memory: 64KB (EGA or VGA)

000A0000h640KB

Conventional system memory: 640KB

00000000h

•The system BIOS and VGA BIOS are contained in one 128KB EPROM. The 64KB system BIOS and 32KB VGA BIOS ROM are shadowed in RAM after the system completes power-on diagnostics. The system and VGA BIOS ROM area in the 000E0000h through 000F0000h range is shadowed at 000E0000h after the system completes power-on diagnostics.

D - 6 Specifications