I reading a Linux book that told me I can check the dma channels by reading /proc/dma.
This is what I see when I run
2: floppy 4: cascade
I'm confused because that looks like old school ISA DMA. I thought this kind of DMA was no longer in use and the DMA controller it required was physically no longer included on motherboards since the advent of PCIe express.
I'm not really sure what I was expecting to see in this file. Is /proc/dma a logical/virtual thingy to support legacy devices?