x
2.2.5 Math
Coprocessor .................................... 2-13
2.2.6 Video
Display ............................................ 2-13
2.2.7 Communication
Status.............................. 2-14
2.2.8
Enhanced IDE Features ........................... 2-14
2.2.9
Num Lock After Boot................................. 2-15
2.2.10 Memory
Test ............................................. 2-15
2.2.11
Large Memory Support Mode ................... 2-16
2.2.12 Auto-Configuration
Mode .......................... 2-16
2.2.13
Fast Boot Mode......................................... 2-16
2.3
Advanced System Configuration.............................. 2-17
2.3.1 Shadow
RAM ............................................ 2-18
2.3.2
Internal Cache (CPU Cache) .................... 2-19
2.3.3 External
Cache ......................................... 2-19
2.3.4
E0000h - FFFFFh (System BIOS) ............ 2-20
2.3.5
C0000h - C7FFFh (Video BIOS)............... 2-20
2.3.6
Memory at 15MB-16MB ............................ 2-20
2.3.7
DRAM Lead-off Timing (Read/Write) ....... 2-20
2.3.8
RAS to CAS Delay .................................... 2-21
2.3.9
DRAM Write Burst Timing ........................ 2-21
2.3.10
DRAM Read Burst Timing ........................ 2-22
2.4
PCI System Configuration........................................ 2-23
2.4.1
PCI IRQ Setting ........................................ 2-23
2.4.2
VGA Palette Snoop................................... 2-24
2.5
Non-PnP ISA Card Configuration ............................ 2-25
2.5.1
System Resources Used by Non-PnP
ISA Cards.................................................. 2-27
2.5.2
Expansion ROM Region ........................... 2-27
