63 lines
2.2 KiB
PHP
Executable File
63 lines
2.2 KiB
PHP
Executable File
; Copyright (c) 2023 Elaina Claus
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this software and associated documentation files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in all
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; copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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; SOFTWARE.
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; Partition table entry format
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; Off. Size. Description
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;0x00 1 Drive attributes (bit 7 set = active or bootable)
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;0x01 3 CHS Address of partition start
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;0x04 1 Partition type
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;0x05 3 CHS address of last partition sector
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;0x08 4 LBA of partition start
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;0x0C 4 Number of sectors in partition
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struc PartEntry_t
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.attributes resb 1
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.chs_start resb 3
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.part_type resb 1
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.chs_end resb 3
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.lba_start resb 4
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.lba_length resb 4
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endstruc
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struc PartTable_t
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.partition1 resb 16
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.partition2 resb 16
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.partition3 resb 16
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.partition4 resb 16
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endstruc
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;Offset Size Description
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; 0 1 size of packet (16 bytes)
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; 1 1 always 0
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; 2 2 number of sectors to transfer (max 127 on some BIOSes)
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; 4 4 transfer buffer (0xFFFF:0xFFFF)
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; 8 4 lower 32-bits of starting 48-bit LBA
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; 12 4 upper 32-bits of starting 48-bit LBA
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; needs to be aligned to a uint32_t
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struc LBAPkt_t
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.size resb 1
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.res0 resb 1
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.xfer_size resw 1
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.offset resw 1
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.segment resw 1
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.lower_lba resd 1
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.upper_lba resd 1
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endstruc |