This driver is intended to be used on any machine running Darwin or MacOS X with a PCI based JMicron SD Card reader such as the Dell Mini 9 or the Acer Aspire One.
It may also be extended to work with other SDHCI compliant hosts.
Current Status: Driver works at "slow-narrow" mode on SD, but not SDHC cards. Code exists and is being integrated for SDHC, 4-bit, and 50MHz modes. Eventually, an interrupt driven instead of polling driver will be written.
Supported Machines: The only machine all the features of the driver are known to work on is the Dell Mini 9 under Mac OS X 10.5.5. Some success has been reported on the Acer Aspire One as well, particularly if a card is present in the slot when the machine is booted.
Installation: Copy the driver to /System/Library/Extensions and run
sudo chown -R root:wheel /System/Library/Extensions/IOSDHCIBlockDevice.kextand reboot and you should be running!
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Written by Brendon Allen and Forest Godfrey based on preliminary work by Reggie McMurtrey. Copyright (C) 2008 Brendon Allen, Forest Godfrey and Reggie McMurtrey and released under the GNU GPL.