Troubleshooting
70
GMB-C2165-LLVA User
‟
s Manual
IRQ 6
System ROM
Diskette Event
IRQ 7
Unused
Usable IRQ
IRQ 8
System ROM
Real-Time Clock
IRQ 9
【
Unassigned
】
Usable IRQ
IRQ 10
【
Unassigned
】
Usable IRQ
IRQ 11
【
Unassigned
】
Usable IRQ
IRQ 12
System ROM
IBM Mouse Event
IRQ 13
System ROM
Coprocessor Error
IRQ 14
System ROM
Hard Disk Event
IRQ 15
【
Unassigned
】
Usable IRQ
It is then very easy to find out which IRQ resource is ready for additional
peripherals. If IRQ resource is not enough, please disable some devices listed above
to release further IRQ numbers.
5.3
System Memory Address Map
Each On-board device in the system is assigned a set of memory addresses, which
also can be identical of the device. The following table lists the system memory
address used for your reference.
System Memory Address Map
Memory Area
Size
Description
0000-003F
1K
Interrupt Area
0040-004F
0.3K
BIOS Data Area
0050-006F
0.5K
System Data
0070-0548
19K
DOS
0549-0FC2
41K
Program Area
0FC3-9B7F
558K
【
Available
】
9B80-9D7F
8K
Unused
First Meg -- Conventional memory end at 630K --
9D80-9DFF
2K
Extended BIOS Area