Advantech som-4450 cpu system on module som-4450 etx User Manual
Appendix B System Assignments
2 5
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