Table A–4
XE–800 SBC interrupt map
XE–800 SBC interrupt map
IRQ Default
Device
Alternate
IRQ0 System
Timer
IRQ1 Keyboard
IRQ2
Cascade to IRQ9
IRQ3 COM2
PC/104
IRQ4 COM1
PC/104
IRQ5 USB1.1
PC/104
IRQ6* Floppy
PC/104
IRQ7* LPT
PC/104
IRQ8 RTC
Alarm
IRQ9
PC/104
IRQ10 USB2.0
PC/104
IRQ11
PC/104
IRQ12 Mouse
PC/104
IRQ13
Reserved for FPU
IRQ14 IDE
Primary
(CompactFlash)
PC/104
IRQ15 IDE
Secondary
PC/104
*available when functions disabled in
Setup
Table A–5
XE–800 SBC memory map
XE–800 SBC memory map
Address Size
Description
Shadowing
00000H to 9FFFFH
640KB
DOS and extended BIOS RAM
A0000H to BFFFFH
128KB
Off Card Memory (shadowable)
C0000H to CBFFFH
48KB
Video BIOS
ENABLED
CC000H to D7FFFH
48KB
Off Card Memory
D8000H to DFFFFH
32KB
Extended BIOS Area when X jumper
installed or off card shadowable
ENABLED
E0000H to FFFFFH
128KB
System BIOS
10000H to FFFFFFFFH
4GB
Addressable Extended Memory
103