Add pattern for Apple 2MG disk images.

disk/2mg.hexpat

@@ -0,0 +1,93 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : 2mg.hexpat
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : ImHex pattern for parsing Apple 2MG disk images.
+// Version        : 1.00
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Parses Apple 2MG disk images.
+//
+// --[ History ] --------------------------------------------------------------
+//     
+//     1.00: Initial release.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2025 Natalia Portillo
+// ****************************************************************************/
+
+#pragma author Nat Portillo <claunia@claunia.com>
+#pragma description Apple 2MG disk images parser (*.2mg)
+#pragma endian little
+#pragma magic [ "2IMG" ] @ 0x00
+
+import type.magic;
+
+enum sector_order_t : u32
+{
+    DOS     = 0,
+    PRODOS  = 1,
+    NIBBLES = 2
+};
+
+struct header_t
+{
+    // Magic
+    type::Magic<"2IMG"> magic;
+    // Disk image creator ID
+    char creator[4];
+    // Header size, constant 0x0040
+    u16 header_size;
+    // Disk image version
+    u16 version;
+    // Disk image format
+    sector_order_t image_format;
+    // Flags and volume number
+    u32 flags;
+    // Blocks for ProDOS, 0 otherwise
+    u32 blocks;
+    // Offset to data
+    u32 data_off;
+    // Data size in bytes
+    u32 data_len;
+    // Offset to optional comment
+    u32 comment_off;
+    // Length of optional comment
+    u32 comment_len;
+    // Offset to creator specific chunk
+    u32 creator_specific_off;
+    // Creator specific chunk size
+    u32 creator_specific_len;
+    // Reserved, should be zero
+    u32 reserved1;
+    // Reserved, should be zero
+    u32 reserved2;
+    // Reserved, should be zero
+    u32 reserved3;
+    // Reserved, should be zero
+    u32 reserved4;
+};
+
+header_t header @ 0x00;
+u8 data[header.data_len] @ header.data_off;
+char comments[header.comment_len] @ header.comment_off;
+u8 creator_specific[header.creator_specific_len] @ header.creator_specific_off;