Toshiba Tecra 500CS User Manual page 458

000-book.bk : 82-resrc.fm5 Page 481 Wednesday, May 15, 1996 4:15 PM
System
Resources
This appendix lists the pre-assigned 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
0 Timer
1 Keyboard
2 PIC #2
3 Reserved
Notes
Choice for diskette drive, main hard disk,
CD-ROM, secondary hard disk, COM port,
serial infrared port, PC Card, modem
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