Appendix C: System Resources - Toshiba 8000 User Manual

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
0 Timer
1 Keyboard
2 PIC #2
3 Modem
4 COM
5 Sound system
Notes
COM port, modem
COM port, modem
COM port, printer, modem, ECP, MPU
*
219