4. CPU Card Resources
SPI-8150-LVA, SPI-8151-LVA
35
4.
CPU Card Resources
4.1 Interrupters
Interrupters
IRQ#
System Resources
NMI
I/O Channel check
0
Reserved(interval Timer)
1
Reserved (Keyboard Controller)
2
Reserved (cascade interrupt from slave PIC)
3
COM2*
4
COM1*
5
LPT2(Plug and Play option)
6
FDD controller
7
LPT1*
8
Real Time Clock
9
User available
10
User available
11
User available
12
Reserved (PS/2 mouse port)
13
Reserved (math Processor)
14
Primary IDE (if present, else user available)
15
Secondary IDE(if present, else user available)
* Default, but can be changed to another IRQ
4.2 Memory Map
Compatibility Area
Address Range (h)
Size
Description
100000 -
511MB
Extended Memory
E8000 - FFFFF
96KB
System BIOS
E0000 - E7FFF
32KB
System BIOS(Available as UMB)
CC000 - DFFFF
80KB
Available high DOS memory(Open to ISA bus)
A0000 - CBFFF
176KB
Video memory and BIOS
00000 - 9FFFF
640KB
Conventional memory
