5. CPU Board Resources
34
PC-686BX(NLX)-LV, PC-686BX(NLX)-LVV
Memory Map
Table 5.2. Memory Map
Address Range (h)
Size
Description
100000-18000000
512MB
Expanded memory
E8000-FFFFF
96KB
System BIOS
E0000-E7FFF
32KB
System BIOS (Can be used for UMB)
C8000-DFFFF
96KB
Available DOS high memory
(Available to ISA bus and PCI bus)
A0000-C7FFF
160KB
Video memory and BIOS
00000-9FFFF
640KB
Original memory
DMA Channels
Table 5.3. DMA Channels
DMA
0
8 or 16 bit
Reserved
1
8 or 16 bit
Reserved (or parallel port (for ECP))
2
8 or 16 bit
Diskette driver
3
8 or 16 bit
Reserved (or parallel port (for ECP))
4
---
Unused (Cascade channel)
5
16 bit
Free
6
16 bit
Free
7
16 bit
Free
System Resource
Data Size