Chapter 3
Hardware
18
Reference Manual
CoreModule 740
0090-0091
System reserved
0092
Fast A20 gate and CPU reset
0093-009F
System reserved
00A0-00A1
Slave Interrupt Controller
00A2-00BF
System reserved
00C0-00DF
Slave DMA Controller #2
00E0-00EF
System reserved
00F0-00FF
Math Coprocessor
01F0-01F7
IDE Hard Disk Controller
0200-0240h
Mapped to ISA
0240-0260h
Mapped to ISA
0279h
Mapped to ISA
02F8-02FF
Serial Port 2 (COM2)
0300-0340h
Mapped to ISA
0340-0360h
Mapped to ISA
0378-037F
Parallel Port (Standard and EPP)
03B0-03BB
Video (monochrome)
03C0-03DF
Video (VGA)
03F0-03F5
Floppy Disk Controller
03F6
IDE Hard Disk Controller
03F7
Floppy Disk Controller
03F8-03FF
Serial Port 1 (COM1)
04D0-04D1
Edge/Level Trigger PIC
0778-077F
Parallel Port (ECP Extensions) (Port 378+400)
0A79h
Mapped to ISA
0CF8-0CFF
PCI Configuration Registers
0CF9
Reset Control Register
NOTE
0279h and 0A79h are the ISA PnP ports used by the BIOS and an OS that supports
this feature to recognize ISA PnP (Plug and Play) cards.
The Intel I/O hub ICH-8 (ICH-6 or later) does not support ISA DMA.
Table 3-3. I/O Address Map (Continued)