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B-4. I/O & MEMORY MAP
Memory Map :
MEMORY MAP ASSIGNMENT
0000000-
009FFFF
System memory used by DOS
and application
00A0000-
00BFFFF
Display buffer memory for VGA/
EGA / CGA / MONOCHROME
adapter
00C0000-
00DFFFF
Reserved for I/O device BIOS
ROM or RAM buffer.
00E0000-
00EFFFF
Reserved for PCI device ROM
00F0000-
00FFFFF
System BIOS ROM
0100000-
FFFFFFF
System extension memory
I/O Map :
I/O MAP ASSIGNMENT
000-01F DMA controller (Master)
020-021 Interrupt controller (Master)
022-023 Chipset controller registers I/O
ports.
040-05F Timer control registers.
060-06F Keyboard interface controller
(8042)
070-07F RTC ports & CMOS I/O ports
080-09F DMA register
0A0-0BF Interrupt controller (Slave)
0C0-0DF DMA controller (Slave)
0F0-0FF Math coprocessor
1F0-1F8 Hard Disk controller
278-27F Parallel port-2
2B0-2DF Graphics adapter controller
2F8-2FF Serial port-2
360-36F Net work ports
378-37F Parallel port-1
3B0-3BF Monochrome & Printer adapter
3C0-3CF EGA adapter
3D0-3DF CGA adapter
3F0-3F7 Floppy disk controller
3F8-3FF Serial port-1