The MMC card controller project is already long time at opencores, but there are no files accessible and author has not replied to our emails either. I wonder if there is any info if the project is going to be updated or not. http://xilinx.openchip.org there is (file downloads) simple C firmware that reads MMC card (in SPI mode), it is currently working in Virtex2Pro, where the MMC card is connected to Microblaze system. I was hoping to see the MMC project at opencores to become public, but it seems it isnt happening, so possible need to write it from scratch then. The C code is quite simple (but real dirty rewrite of something I found on the web) - it can be used by other FPGA processors as well to load it memory contents. I wrote it mainly to create a bootloader for MicroBlaze uCLinux Antti Lukats www.openchip.org