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=== 1GB card (1988608 * 512) ===mmca_vsn : 4cmdclass : e59e=3 m=4093capacity  = 131008read_blkbits = 7capacity << (read_blkbits - 9) = 0=== 4GB card (7959552 * 512) ===mmca_vsn : 2cmdclass : 1e5e=2 m=3585capacity  = 57376read_blkbits = 12capacity << (read_blkbits - 9) = 459008