Kontron MOPSlcdLX, Руководство пользователя

Страница: 43 / 54

KTD-S0005-0 Page 39 Appendix A: System Resources
MOPSlcdLX
User's Guide
A.2 Direct Memory Access (DMA) Channels
DMA # Used for Available Comment
0 Yes
1
Yes
2 Floppy Controller No Note (1)
3
Yes
4 Cascade No
5
No Note (2)
6 No Note (2)
7
No Note (2)
Note:
1)
If the
Used for
device is disabled in the BIOS Setup the corresponding DMA channel is free.
2)
16 bit DMA channels not available.
A.3 Memory Area
The first 640 kB of DRAM are used as main memory. DOS can address 1 MB of memory directly. Memory area
above 1 MB (high memory, extended memory) is accessed under DOS via special drivers such as HIMEM.SYS.
Other operating systems (Linux or Windows
®
versions) allow you to address the full memory area directly.
Memory Range Used for Available Comment
C0000h - C7FFFh
VGA BIOS No
C8000h - CFFFFh Yes if onboard graphic controller is used
D0000h - DFFFFh
Yes
E0000h - E7FFFh Yes Free for ISA bus
E8000h - FFFFFh
System BIOS No