ms_bootblock_page0
(be16_to_cpu(((struct ms_bootblock_page0 *)PageBuffer0)->header.wBlockID) != MS_BOOT_BLOCK_ID) ||
(be16_to_cpu(((struct ms_bootblock_page0 *)PageBuffer0)->header.wFormatVersion) != MS_BOOT_BLOCK_FORMAT_VERSION) ||
(((struct ms_bootblock_page0 *)PageBuffer0)->header.bNumberOfDataEntry != MS_BOOT_BLOCK_DATA_ENTRIES))
SysInfo = &(((struct ms_bootblock_page0 *)PageData)->sysinf);
SysEntry = &(((struct ms_bootblock_page0 *)PageData)->sysent);