Forums before death by AOL, social media and spammers... "We can't have nice things"
|    alt.os.development    |    Operating system development chatter    |    4,255 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 4,090 of 4,255    |
|    wolfgang kern to All    |
|    UEFI GPT    |
|    20 Jan 24 05:16:18    |
      From: nowhere@never.at              my attempt to manually create a complete UEFI startup with KESYS hexwork       still encounter many obstacles :)              please tell me what I may have missed and what's different to your settings.       TIA       __       wolfgang              what I have so far:       (almost all is in hex, b/w/q/dq/qq mean 8/16/32/64/128 bit)       [LBA_0] MBR:       0000 ... all zero       01BE xx xx xx EE yy yy yy 01 00 00 00 ss ss ss ss        x = start CHS usually 1        y = end CHS usually FFFFFF        0000_0001 start LBA of GPT image        0000_0004 size of this GPT image LBA_0,1,2,3 (in sectors)        specs want much more to waste       01CE ... all zero       01FE 55 AA       ------------------       [LBA_1] GPT header       000 45 46 49 20 50 41 52 54 ;"EFI PART" Signature       008 00 00 01 00 Revision for GPT version 1.0        (through at least UEFI version 2.3.1),       00C 5C 00 00 00 Header size (in bytes)       010 q 0 CRC32 of header (offset +0 up to header size),        with this field zeroed during calculation       014 q 0 Reserved; must be zero       018 dq .... Current LBA (location of this header copy)       020 dq .... Backup LBA (location of the other header copy)       028 dq 4 First usable LBA for partitions (primary last LBA + 1)        specs say minimum 6 for 4K sectors and 34dec for 512 byte sectors        what a waste ...       030 dq .... Last usable LBA (secondary partition first LBA - 1)       038 dq ??? Disk GUID (also referred as UUID on UNIXes)       048 dq 2 Starting LBA of array of partition entries        (always 2 in primary)       050 q 00000004 Number of partition entries in array       054 q 00000080 Size of a single partition entry (usually 128)       058 q 0 CRC32 of partition array       05C..end of sector; all ZERO        (420 bytes for 512 byte sectors; but more with larger sector sizes)       ---------------------------       [LBA_2] I'd have only four partition entries assigned       GUID partition entry format [128 byte each]       000 qq Partition type GUID       1. ??? boot part ;FAT32       2. "KESYS 64 ddmm2024" to be declared global unique ;KESYS64       3. 28 73 C1 2A-1F F8 D2 11 BA 4B 00 A0 C9 3E C9 3B ;EFI       4. 16 E3 C9 E3 5C 0B B8 4D 81 7D F9 2D F0 02 15 AE ;M$ reserved        ??? ;or NTFS       010 qq ??? Unique partition GUID       020 dq 4/x/x/x First LBA (specs say 6 or 34 for first partition)       028 dq Last LBA (inclusive, usually odd)       030 dq Attribute flags       038 str 72 bytes Partition name (36 UTF-16LE code units)              The 64-bit partition table attributes are shared between 48-bit common       attributes for all partition types, and 16-bit type-specific attributes.        |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca