Advantech SOM-4450 CPU System On Module SOM-4450 ETX Manual do Utilizador descarregar pdf (Página 31)

Appendix B System Assignments 25

B.2 DMA channel assignments

Table B-2: DMA channel assignments

Channel Function

0 Available

1 Available

2 Floppy disk (8-bit transfer)

3 Parallel**

4 Cascade for DMA controller 1

5 Available

6 Available

7 Available

** Parallel port DMA default setting: DMA 3

Parallel port DMA select: DMA 1, 3

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