NEC VERSA 4000 - Memory Map; NEC Versa 4000 Series System Memory Map

1-6 Technical Information
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. Table Section 1-1 lists the system's memory map.
To view a more complete breakdown, and to determine available space for the addition of
drivers etc., type
MSD
at the DOS prompt and press
Enter
.
Table Section 1-1 NEC Versa 4000 Series System Memory Map
Memory Space Size Function
0027FFFFh-
00C0000h
40 MB Reserved for Extended Memory
000BFFFFh-
00010000h
8 MB
Base Memory
000FFFFFh-
000F0000h
64 KB ROM BIOS
000EFFFFh-
000CA000h
152 KB Upper Memory Block (UMB)
000C9FFFh-
000C0000h
40 KB Video ROM BIOS
000BFFFFh-
000A0000h
128 KB Video Memory
0009FFFFh-
0000000h
640 KB Conventional Memory