Electronic Specifications; Memory Map; Interrupts - Gateway E-9220T User Manual

Electronic specifications

Memory map

Address Range (hex)
0 to 07FFFFh
0A0000h to 0BFFFFh
0C0000h and 0DFFFFh
0E0000h to 0FFFFFh
0E0000h to 0EFFFFh
FC000000h to FFFFFFFFh

Interrupts

The following table reflects a typical configuration, but you can change these interrupts.
Use this information to determine how to program each interrupt. The actual interrupt
map is defined using configuration registers in the ICH5-R (I/O controller). I/O Redirection
Registers in the I/O APIC are provided for each interrupt signal. The signals define hardware
interrupt signal characteristics for APIC messages sent to local APIC(s).
Important
Amount
640 KB
128 KB
128 KB
128 KB
2 MB
64 MB
If you disable an IDE controller to free the interrupt for that controller,
you must physically unplug the IDE cable from the system board.
Simply disabling the drive by configuring the BIOS does not make
the interrupt available.
Interrupt Description
IRQ0 Timer/counter, HPET #0 in legacy
replacement Mode. In APIC mode,
cascade from 8259 controller 1
IRQ1 Keyboard controller
IRQ2 Slave controller INTR output. In APIC
mode Timer/counter, HPET #0
IRQ3 Serial port A
IRQ4 Serial port B
IRQ5 Parallel port
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Electronic specifications
Function
DOS region, base system memory
Video or SMM memory
Expansion card BIOS and buffer area
System BIOS
Extended system BIOS
PCI memory space
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