
BIOS Overview
| 
 | DMA controller | 
| 
 | 
 | 
| Channel | Function | 
| 
 | 
 | 
| 0 | Free | 
| 1 | Free if not used for parallel port in Setup | 
| 2 | Floppy disk controller | 
| 3 | Free if not used for parallel port in Setup | 
| 4 | Used to cascade DMA channels  | 
| 5 | Free | 
| 6 | Free | 
| 7 | Free | 
| 
 | 
 | 
Interrupt Controllers
The Interrupt Requests (IRQs) are numbered sequentially, starting with the master controller, and followed by the slave.
| 
 | Windows 2000 and Windows XP | |
| 
 | 
 | |
| IRQ | Interrupt Request Description | |
| (Interrupt Vector) | ||
| 
 | ||
| 
 | 
 | |
| INTR | 
 | |
| 
 | 
 | |
| ISA0 | System Timer | |
| 
 | 
 | |
| ISA1 | Standard  | |
| 
 | 
 | |
| ISA3 | Communication Port (COM2) | |
| 
 | 
 | |
| ISA4 | Communication Port (COM1) | |
| 
 | 
 | |
| ISA6 | Standard Floppy Disk Controller | |
| 
 | 
 | |
| ISA8 | System CMOS/real time clock | |
| 
 | 
 | |
| ISA9 | Microsoft  | |
| 
 | 
 | |
| ISA12 | PS/2 Compatible Mouse | |
| 
 | 
 | |
| ISA13 | Numeric data processor | |
| 
 | 
 | |
| ISA14 | Primary IDE Channel | |
| 
 | 
 | |
| ISA15 | Secondary IDE Channel | |
| 
 | 
 | |
| PCI5 | Intel(R) 82801BA/BAM SMBus Controller - 2443 | |
| 
 | 
 | |
| PCI17 | Intel(R) 82801BA/BAM AC’97 Audio Controller - 2445 | |
| 
 | 
 | |
| PCI19 | Intel(R) 82801BA/BAM USB Universal Host Controller - 2442 | |
| 
 | 
 | |
| PCI20 | Intel(R) PRO/100 VE Network Connection | |
| 
 | 
 | |
| PCI 23 | Intel(R) 82801BA/BAM USB Universal Host Controller - 2444 | |
| 
 | 
 | 
46 Evo D310 Micro Desktop