24 System Introductions

Hardware Configuration and Specification

Memory Address Map

Memory Address Size Function
00000000-0009FFFF 640 KB Base memory
000A0000-000BFFFF 128 KB Video memory
000C0000-000C9FFF 40 KB Video BIOS
000CA000-000CBFFF 8 KB I/O ROM
000E0000-000FFFFF 128 KB System BIOS
00100000-top limited
04301000-04301FFF
04302000-04302FFF
0430000-04300FFFF
--
4 KB
4 KB
64 KB
Extended (DIMM) memory
PCMCIA controller (slot 1)
PCMCIA controller (slot 2)
USB controller
FFFF0000-FFFFFFFF 64 KB System board extension for
PnP BIOS

Interrupt Channel Assignment

Interrupt Channel Function
NMI System errors
IRQ0 System timer
IRQ1 Keyboard
IRQ2 Cascade
IRQ3 R2 Card
IRQ4 COM1
IRQ5 Audio or LPT1 (optional)
IRQ6 Floppy
IRQ7 LPT1 or Audio (optional)
IRQ8 Real time clock
IRQ9 Card bus / ACPI / Modem
IRQ10 USB
IRQ11 FIR
IRQ12 PS2 pointing device
IRQ13 Numeric data proces sor
IRQ14 1st EIDE device (hard disk)
IRQ15 2nd EIDE device (CD-ROM drive)