NEC VERSA VXi, Service And Reference Manual

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9-8 Specifications
Memory Map
The system supports system and video shadowing, both controlled through complementary
metal oxide semiconductor (CMOS). The system supports BIOS as a cacheable area with write
protection. The following table shows the system’s memory map.
System Memory Map
Memory Space Size Function
00000000h-0009FFFFh 640 KB System Memory
000A0000h-000BFFFFh 128 KB Video Memory
000C0000h-000DFFFFh 128 KB
000E0000h-000FFFFFh 128 KB System and Video BIOS
01000000h-01FFFFFFh 32 MB Extended Memory
02000000h-03FFFFFFh 32 MB Extended Memory
04000000h-0FFFFFFFh Up to 256 MB Extended Memory
Interrupt Controllers
The following table shows default interrupt level assignments 0 through 15.
Interrupts
IRQ# Device
IRQ00 Internal Timer
IRQ01 Keyboard
IRQ02 PIC
IRQ03 IR
IRQ04 Serial Port
IRQ05 CardBus/Mini-PCI/AC Link/Firewire
IRQ06 Diskette Drive
IRQ07 Parallel Port
IRQ08 Real-time Clock
IRQ09 USB (2) / SCI (only ACPI)
IRQ10 CardBus/Mini-PCI/AC Link/Video/Firewire
IRQ11 Available
IRQ12 Mouse
IRQ13 Coprocessor
IRQ14 Hard Disk Controller
IRQ15 Available