Information Technology Reference
In-Depth Information
Keyboard
196
Parallel Port
272
PCI bus
105
PCMCIA
174
PIIX3
123
RS-232 (modem)
232
RS-232 (null modem)
230
RS-232
232
SCSI
159
SCSI-II
160
TXC
125
USB
182
VESA VL-Local Bus
509
Typical IRQs
Typical DMA channels
0
Internal timer
1 Keyboard
0
Any
2
Cascaded interrupt
3 COM2
1
Any
4
COM1
5 (Soundcard)
2
Floppy disk
6
Floppy disk
7 LPT1
3
Parallel port
8
Real-time clock
9 User available
4
Cascaded DMA
10 User available
11 (PCI steering)
5
Any
12 Serial bus mouse (if any)
13 Math coprocessor
6
Any
Any
14 Primary IDE
15 Secondary IDE
7
Example I/O map
0000-000F
Slave DMA controller 0020-0021
Master PIC
0040-0043
System timer
0060
Keyboard
0061
Speaker
0064
Keyboard
0070-0071
Real-time clock
0080-008F
DMA
00A0-00A1
Slave PIC
00F0-00FF
Numeric processor
0170-0177
Secondary H/D
0200-020F
Game port
0220-022F
Soundcard
0294-0297
PCI bus
02F8-02FF
COM2
0330-0331
Soundcard
0370-0371
Soundcard
0376
Secondary IDE
0378-037A
LPT1
0388-03B8
Soundcard
03B0-03BB
VGA
03C0-03DF
VGA
03F6
Primary IDE
03F8-03FF
COM1
0480-048F
PCI bus
04D0-04D1
PCI bus
0530-0537
Soundcard
0778-077A
ECP Port (LPT1)
0CF8-0CFF
PCI bus
4000-403F
PCI bus
5000-5018
PCI bus
D000-DFFF
AGP controller
E400-E4FF
VGA
E000-E01F
USB controller
