Kontron speedMOPSlcdCE, Руководство пользователя

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KONTRON
speedMOPSlcdCE User’s Guide 51 Appendix A: System-Resource Allocation
23.2
Direct Memory Access (DMA) Channels
DMA # Use Available Comment
0 Yes
1 Sound No Note (1), (2)
2 FDC No Note (1)
3 LPT Yes Note (2)
4 Cascade No
5 Yes
6 Yes
7 Yes
Notes: (1) If the „used for“-device is disabled in setup, the corresponding DMA
channel is available for other devices.
(2) Possible setting for LPT1 if configured for ECP mode.
23.3
Memory Map
The speedMOPSlcdCE processor modules can support up to 512MB of memory. The first 640KB of
SDRAM are used as main memory.
Using DOS, you can address 1MB of memory directly. Memory area above 1MB (high memory,
extended memory) is accessed under DOS via special drivers such as HIMEM.SYS and EMM386.EXE,
which are part of the operating system. Please refer to the operating system documentation or
special textbooks for information about HIMEM.SYS and EMM386.EXE.
Other operating systems (Linux or Windows) allow you to address the full memory area directly.
Upper Memory Use Available Comment
A0000h – BFFFFh VGA Memory No Mainly used by graphic adapter cards. If a PCI
graphic card is in the system this memory area
is mapped to the PCI bus.
C0000h – CFFFFh VGA BIOS,
RPL/PXE ROM
No
D0000h – DFFFFh Yes Free for ISA bus or shadow RAM in standard
configurations.
If JRC software is used, a 16K block is
shadowed for BIOS extension, starting with first
free area at D0000h, D4000h, D8000hor
DC000h. (BIOS extensions do not use the
whole shadow block.)
E0000h – F0000h System BIOS,
USB legacy
support
No