In many Wince devices Compact Flash (CF) memory cards are used through IDE (ATA) interface by using IDE to CF adapter. CF memory cards are available in PIO mode and Ultra DMA mode (UDMA). We have seen many enquiries in the newsgroups and mailing lists about the CF memory card not working or the Ultra DMA mode not working in Windows CE. Sometimes the problems are there in the IDE to CF adapter card or in the software driver. We also ran in to similar issues when we worked with this and came up with an article for this. Here is the link to the article – https://www.e-consystems.com/Articles/Windows-CE/operatingCF.asp. Please feel free to post in your comments.