testcases

1) Install on HD with FAT16 using MS-DOS 6, ensure it boots
	dd if=/dev/zero of=hd.img bs=512 count=1 seek=129023

2) Wipe out the first 0xDA bytes and repair; ensure it boots
	dd if=/dev/zero of=hd.img bs=112 count=1 conv=notrunc

3) Blit BOOT.16 to the first sector and repair; ensure it boots
	mcopy -i hd.img ::BOOT.16 BOOT.16
        tr '\0' '\220' < /dev/zero | dd of=BOOT.16 bs=1 count=1 seek=2 conv=notrunc
	dd if=BOOT.16 of=hd.img bs=512 count=1 conv=notrunc

4) Install on HD with FAT32 using Win95 OSR2, ensure it boots
	dd if=/dev/zero of=hd.img bs=512 count=1 seek=1290230

5) Wipe out the first 0xDA bytes and repair; ensure it boots
	dd if=/dev/zero of=hd.img bs=112 count=1 conv=notrunc

6) Blit reserved sector to the first sector and repair; ensure it boots
	; Find reserved sector looking for HDSFBSIG
	dd if=hd.img of=BOOT.32 bs=256 count=2 skip=?
	dd if=hd.img of=BOOT.32 bs=16 count=1 conv=notrunc
	dd if=BOOT.32 of=hd.img bs=512 count=1 conv=notrunc