219
System
m
Resources
This appendix lists the IRQ levels, DMA channels and I/O port
addresses.
IRQ level assignments
The direct line to the CPU is called an Interrupt ReQuest (IRQ)
level or channel. You’ll hear both terms used by technical experts.
They mean the same thing. The following table lists the default
IRQ level assignments for the computer:
IRQ
Use
Notes
0
Timer
1
Keyboard
2
PIC #2
3
Modem
COM port, modem
4
COM
COM port, modem
5
Sound system
COM port, printer, modem, ECP, MPU
*
Summary of Contents for 8000 series
Page 21: ...xxi ...
Page 22: ......
Page 43: ...Part I Getting to Know Your Computer To Begin When and how to turn off the computer 19 ...
Page 107: ...Part I Getting to Know Your Computer Using Drives Playing a DVD video 83 ...
Page 174: ......
Page 176: ...Chapter Using TSETUP 153 Using Hardware Setup 154 ...
Page 210: ...Chapter Industry standard architecture 187 System management 189 Security management 196 ...
Page 224: ......
Page 226: ...Appendix Built in features 203 Optional accessories and devices 211 Specifications 214 ...
Page 239: ...Part III Appendixes Features and Specifications 215 ...
Page 240: ...Appendix ...
Page 249: ...Part III Appendixes System Resources 225 ...
Page 250: ...Appendix ...