Epson Equity 486DX2/50 PLUS User Manual - Page 204
System Memory Map
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System Memory Map 02000000h Extended memory 16MB (Maximum system memory on SIMMs) OO1OOOOOh 1MB System BIOS ROM: 64KB* c 000F0000h VGA BIOS: 32KB* c 000E0000h Available t 000D0000h Available 000C0000h Video memory: 64KB (MDA or CGA) c 000B0000h Video memory: 64KB (EGA or VGA) 000A0000h 640KB Conventional system memory: 640KB 00000000h l 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
System Memory Map
02000000h
16MB
(Maximum system
memory on SIMMs)
Extended memory
OO1OOOOOh
1MB
System BIOS ROM: 64KB*
000F0000h
c
VGA BIOS: 32KB*
000E0000h
c
Available
000D0000h
t
Available
000C0000h
Video memory: 64KB (MDA or CGA)
000B0000h
c
Video memory: 64KB (EGA or VGA)
000A0000h
640KB
Conventional system memory: 640KB
00000000h
l
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