I have seen some high quality PCMCIA sound cards advertised on the web, however I am disappointed that PCMCIA sound cards are not supported in Linux. I have one company in mind that may be willing to supply the specifications for a PCMCIA sound card they produce. I would be willing to learn how to write a driver, however right now I'm just gathering background information. According to what I have read, the reason that PCMCIA sound cards are not supported in Linux, is because they use DMA. Going on this assumption I have four questions, which I'm posting to the PCMCIA mailing list as well as the one for ALSA. 1. Is DMA used on PCMCIA cards other than sound cards? 2. Have any PCMCIA DMA drivers been written for Linux? 3. Can a DMA driver written for a PCMCIA card (other than sound) be easily adapted for a sound card? 4. If a PCMCIA DMA driver module were written, how easy would it be for a ALSA module to interface with the DMA module?