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14
System Specifications
Hardware Configuration and Specifications
Memory Address Map
Address Range
Definition
Function
000000-09FFFF
640 KB memory
Base memory
0A0000-0BFFFF
128 KB video RAM
Reserved
0C0000-0CBFFF
Video BIOS
Video BIOS
0F0000-0FFFFF
64 KB system BIOS
System BIOS
100000-top limited
Extended memory
SIMM memory
FE0000-FFFFFF
256 KB system ROM
Duplicate of code
assignment at 0E0000-
0FFFFF
Interrupt channel default assignment
Channel
Default setting
mode
Remarks
NMI
System errors
IRQ0
System timer
Edge trigger
IRQ1
Keyboard
Edge trigger
IRQ2
(cascade)
Edge trigger
IRQ3
Modem/COM1
(can be disable)
Edge trigger
Dynamically
programmable
IRQ4
Infrared
Edge trigger
Dynamically
programmable
IRQ5
SoundBlaster
Audio (PCI
device)
Level trigger
PCI interrupt
sharing
IRQ6
Floppy
Edge trigger
IRQ7
Printer
Edge trigger
Dynamically
programmable
IRQ8
Real time clock
Edge trigger
IRQ9
(SCI for ACPI
OS) PCI device
Level trigger
PCI interrupt
sharing
IRQ10
Modem
Edge trigger
Dynamically
programmable
IRQ11
PCI device
Level trigger
PCI interrupt
sharing
IRQ12
Pointing device
Edge trigger
IRQ13
Math
coprocessor
Edge trigger
IRQ14
Hard disk driver
720.book Page 14 Saturday, March 6, 1999 10:00 AM
Summary of Contents for 721TX - TravelMate - PII 333 MHz
Page 8: ...VIII Table of Contents 720 book Page VIII Saturday March 6 1999 10 00 AM ...
Page 62: ...54 System Utilities 720 book Page 54 Saturday March 6 1999 10 00 AM ...
Page 110: ...102 Troubleshooting 720 book Page 102 Saturday March 6 1999 10 00 AM ...
Page 128: ...120 FRU Field Replaceable Unit List 720 book Page 120 Saturday March 6 1999 10 00 AM ...
Page 130: ...122 Model Definition and Configuration 720 book Page 122 Saturday March 6 1999 10 00 AM ...
Page 136: ...128 Online Support Information 720 book Page 128 Saturday March 6 1999 10 00 AM ...
Page 142: ...134 Index 720 book Page 134 Saturday March 6 1999 10 00 AM ...