Supported operating system:

Windows XP 32-bit
Windows XP 64-bit
Windows Vista 32-bit
Windows Vista 64-bit
Windows 7 32-bit
Windows 7 64-bit

Release note:
JMicron JMB38x Card Reader version 1.00.47 WHQL driver for WinXP-32/XP-64/2003/Vista-32/Vista-64/Win7-32/Win7-64 released on 3rd Aug 2010.

Supported Devices:
JMB38X MS Host Controller
JMB38X SD Host Controller
JMB38X SD/MMC Host Controller
JMB38X xD Host Controller