Kontron MOPSlcdLX Instrukcja Użytkownika Pobierz pdf (Strona 43)

KTD-S0005-C 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

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