65
15. BIOS
Physical BIOS memory is located in a 128K byte, 32-pin, PLCC device designated U15.
The device spans 128K of memory in the Upper Memory Area, addresses C0000h to
CFFFFh and F0000h to FFFFFh. System BIOS occupies the upper 64K bytes and the
VGA BIOS and various drivers occupy the lower 64K
640K bytes (RAM)
Conventional Memory Area
000000h
0A0000h
100000h
384K bytes (RAM & ROM)
Expanded Memory Area
System BIOS & Setup
0F0000h
0E0000h
0D0000h
0C0000h
0B0000h
0A0000h
VGA BIOS & Drivers
Available for ROM BIOS
Available for ROM BIOS
Display Adapter Memory
Display Adapter Memory
E27
E28
BIOS Memory Device
E18
J1
1
1
J19
U7
U6
E9
U13
2
J2
J3
E5
U8
E8
E7
E6
2
J4
1
6
E16
E10
E14
E13
E11
E15
E12
U9
E17
U14
1
E1
J18
1
E3
E2
E4
3
U16
E19
E20
E21
E22
E23
E24
E25
U15
U10
E26
U11
J6
J7
J8
J5
1
1
1
J9
J10
U24
E29
BT1
E30
1
J11
U18
1
J12
1
E31
E32
T1
U21
J17
1
J14
J13
1
J16
1
Содержание NPC-486E
Страница 11: ...4 ...
Страница 23: ...16 ...
Страница 31: ...24 ...
Страница 39: ...32 ...
Страница 43: ...36 ...
Страница 57: ...50 ...
Страница 59: ...52 ...
Страница 63: ...56 ...
Страница 75: ...68 ...
Страница 83: ...76 ...
Страница 88: ...81 Appendix D Mechanical Specification ...
Страница 89: ...82 ...
Страница 93: ...86 ...