Lpc2000

I had the same problem when I ported the FAT code from AVRLib to my
LPC2106 project.  I went with the non-portable approach:

struct bootsector710 {
    unsigned int     bsJump:24;
    unsigned char    bsOEMName[8]; 
    unsigned char    bsBPB[53];
    unsigned char    bsExt[26];
    unsigned char    bsBootCode[418];
    unsigned char    bsBootSectSig2;
    unsigned char    bsBootSectSig3;
    unsigned char    bsBootSectSig0;
    unsigned char    bsBootSectSig1;
#define BOOTSIG0        0x55
#define BOOTSIG1        0xaa
#define BOOTSIG2        0
#define BOOTSIG3        0
} __attribute__ ((packed));  <=== non-portable

I didn't have the ability to change the structure - that's the way the
data is set out on the disk.

These structs are defined and accessed in a single source file.  I can
live with it.

Richard