IRQ LISTING

The below lists the standard IRQ configuration found in modern PC computers. The below IRQs that have the Card Type 8/16-BIT are configurable and possibly removable. However, all others cannot be removed or shared. When listing the IRQs and encounter IRQs that are doubled, it could possibly indicate an IRQ confliction or that the IRQ is being shared. The exception to this are IRQs 14 and 15.

IRQ               DEVICE         I/O PORT   BUS SLOT  CARD TYPE

00     System Timer              None    NO    NONE
01     Keyboard                     None NO NONE
02     Cascade Controller
          2nd PIC                       None NO NONE
03 COM 2 / 4 COM 2: 02F8h (02F8 / 2F8)
COM 4: 02E8h (02E8 / 2E8) YES 8 / 16-BIT
04 COM 1 / 3 COM 1: 03F8h (03F8 / 3F8)
COM 3: 03E8h (03E8 / 3E8) YES 8 / 16-BIT
05 Sound
Parallel Port 2 PARALLEL PORT 2:
0278h - 0378h YES 8 / 16-BIT
06 Floppy 03F0 - 03F5 YES 8 / 16-BIT
07 Parallel Port 1 0278h - 0378h YES 8 / 16-BIT
08 Real-time Clock None NO NONE
09 Redirected IRQ 2
Open
Network Available None YES 8 / 16-BIT
10 Open None YES 8 / 16-BIT
11 Open
SCSI
Video VIDEO:
3B0-3DF YES 8 / 16-BIT
12 Open
PS2 None YES 8 / 16-BIT
13 Coprocessor None NO NONE
14 Open
Primary hard drive (master)
Hard Drive Controller 1ST IDE: 1F0 YES 8 / 16-BIT
15 Open
2nd hard drive (slave) 2ND IDE: 170 YES 8 / 16-BIT

DMA CHANNELS
 
CHANNEL 
AVAILABILITY
00 Available
01 Sound device
02 Standard floppy disk controller
03 Available
04 Direct memory access controller
05 Available
06 Available
07 Available