diff --git a/bootloader/hos/hos.c b/bootloader/hos/hos.c
index 50df7a4..4504a4a 100644
--- a/bootloader/hos/hos.c
+++ b/bootloader/hos/hos.c
@@ -124,6 +124,7 @@ static const u8 master_kekseed_t210_tsec_v4[HOS_KB_VERSION_MAX - HOS_KB_VERSION_
 	{ 0x71, 0xB9, 0xA6, 0xC0, 0xFF, 0x97, 0x6B, 0x0C, 0xB4, 0x40, 0xB9, 0xD5, 0x81, 0x5D, 0x81, 0x90 }, // 17.0.0.
 	{ 0x00, 0x04, 0x5D, 0xF0, 0x4D, 0xCD, 0x14, 0xA3, 0x1C, 0xBF, 0xDE, 0x48, 0x55, 0xBA, 0x35, 0xC1 }, // 18.0.0.
 	{ 0xD7, 0x63, 0x74, 0x46, 0x4E, 0xBA, 0x78, 0x0A, 0x7C, 0x9D, 0xB3, 0xE8, 0x7A, 0x3D, 0x71, 0xE3 }, // 19.0.0.
+	{ 0xA1, 0x7D, 0x34, 0xDB, 0x2D, 0x9D, 0xDA, 0xE5, 0xF8, 0x15, 0x63, 0x4C, 0x8F, 0xE7, 0x6C, 0xD8 }, // 20.0.0.
 };
 
 //!TODO: Update on mkey changes.
@@ -142,6 +143,7 @@ static const u8 master_kekseed_t210b01[HOS_KB_VERSION_MAX - HOS_KB_VERSION_600 +
 	{ 0x8D, 0xEE, 0x9E, 0x11, 0x36, 0x3A, 0x9B, 0x0A, 0x6A, 0xC7, 0xBB, 0xE9, 0xD1, 0x03, 0xF7, 0x80 }, // 17.0.0.
 	{ 0x4F, 0x41, 0x3C, 0x3B, 0xFB, 0x6A, 0x01, 0x2A, 0x68, 0x9F, 0x83, 0xE9, 0x53, 0xBD, 0x16, 0xD2 }, // 18.0.0.
 	{ 0x31, 0xBE, 0x25, 0xFB, 0xDB, 0xB4, 0xEE, 0x49, 0x5C, 0x77, 0x05, 0xC2, 0x36, 0x9F, 0x34, 0x80 }, // 19.0.0.
+	{ 0x1A, 0x31, 0x62, 0x87, 0xA8, 0x09, 0xCA, 0xF8, 0x69, 0x15, 0x45, 0xC2, 0x6B, 0xAA, 0x5A, 0x8A }, // 20.0.0.
 };
 
 static const u8 console_keyseed[SE_KEY_128_SIZE] =
diff --git a/bootloader/hos/hos.h b/bootloader/hos/hos.h
index 0cb695b..a04f650 100644
--- a/bootloader/hos/hos.h
+++ b/bootloader/hos/hos.h
@@ -46,7 +46,8 @@ enum {
 	HOS_KB_VERSION_1700 = 16,
 	HOS_KB_VERSION_1800 = 17,
 	HOS_KB_VERSION_1900 = 18,
-	HOS_KB_VERSION_MAX  = HOS_KB_VERSION_1900
+	HOS_KB_VERSION_2000 = 19,
+	HOS_KB_VERSION_MAX  = HOS_KB_VERSION_2000
 };
 
 #define HOS_TSEC_VERSION 4 //! TODO: Update on TSEC Root Key changes.
diff --git a/bootloader/hos/pkg1.c b/bootloader/hos/pkg1.c
index a80557e..9d6b783 100644
--- a/bootloader/hos/pkg1.c
+++ b/bootloader/hos/pkg1.c
@@ -171,7 +171,8 @@ static const pkg1_id_t _pkg1_ids[] = {
 	{ "20230111", 15, 18, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 16.0.0 - 16.1.0.
 	{ "20230906", 16, 19, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 17.0.0 - 17.0.1.
 	{ "20240207", 17, 19, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 18.0.0 - 18.1.0.
-	{ "20240808", 18, 20, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 19.0.0+
+	{ "20240808", 18, 20, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 19.0.0 - 19.0.1.
+	{ "20250206", 19, 21, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000, NULL }, // 20.0.0+
 };
 
 const pkg1_id_t *pkg1_get_latest()
diff --git a/bootloader/hos/pkg2_patches.inl b/bootloader/hos/pkg2_patches.inl
index 23d3c54..baf62ee 100644
--- a/bootloader/hos/pkg2_patches.inl
+++ b/bootloader/hos/pkg2_patches.inl
@@ -818,6 +818,30 @@ static const kip1_patchset_t _fs_patches_1900_exfat[] = {
 	{ NULL, NULL }
 };
 
+static const kip1_patch_t _fs_nogc_2000[] = {
+	{ KPS(KIP_TEXT) | 0x17C150, 8, KIP1_PATCH_SRC_NO_CHECK, "\xE0\x03\x1F\x2A\xC0\x03\x5F\xD6" },
+	{ KPS(KIP_TEXT) | 0x1A7D24, 4, KIP1_PATCH_SRC_NO_CHECK, "\x14\x80\x80\x52" },
+	{ KPS(KIP_TEXT) | 0x1A7F24, 4, KIP1_PATCH_SRC_NO_CHECK, "\x16\x80\x80\x52" },
+	{ 0, 0, NULL, NULL }
+};
+
+static const kip1_patchset_t _fs_patches_2000[] = {
+	{ "nogc",     _fs_nogc_2000 },
+	{ NULL, NULL }
+};
+
+static const kip1_patch_t _fs_nogc_2000_exfat[] = {
+	{ KPS(KIP_TEXT) | 0x187A70, 8, KIP1_PATCH_SRC_NO_CHECK, "\xE0\x03\x1F\x2A\xC0\x03\x5F\xD6" },
+	{ KPS(KIP_TEXT) | 0x1B3644, 4, KIP1_PATCH_SRC_NO_CHECK, "\x14\x80\x80\x52" },
+	{ KPS(KIP_TEXT) | 0x1B3844, 4, KIP1_PATCH_SRC_NO_CHECK, "\x16\x80\x80\x52" },
+	{ 0, 0, NULL, NULL }
+};
+
+static const kip1_patchset_t _fs_patches_2000_exfat[] = {
+	{ "nogc",     _fs_nogc_2000_exfat },
+	{ NULL, NULL }
+};
+
 // SHA256 hashes.
 static const kip1_id_t _kip_ids[] =
 {
@@ -883,4 +907,6 @@ static const kip1_id_t _kip_ids[] =
 	{ "FS", "\x20\x4C\xBA\x86\xDE\x08\x44\x6A", _fs_patches_1800_exfat }, // FS 18.1.0 exFAT
 	{ "FS", "\xD9\x4C\x68\x15\xF8\xF5\x0A\x20", _fs_patches_1900 },       // FS 19.0.0
 	{ "FS", "\xED\xA8\x78\x68\xA4\x49\x07\x50", _fs_patches_1900_exfat }, // FS 19.0.0 exFAT
+	{ "FS", "\x63\x54\x96\x9E\x60\xA7\x97\x7B", _fs_patches_2000 },       // FS 20.0.0
+	{ "FS", "\x47\x41\x07\x10\x65\x4F\xA4\x3F", _fs_patches_2000_exfat }, // FS 20.0.0 exFAT
 };
diff --git a/bootloader/hos/secmon_exo.c b/bootloader/hos/secmon_exo.c
index 8242113..5b2d9f1 100644
--- a/bootloader/hos/secmon_exo.c
+++ b/bootloader/hos/secmon_exo.c
@@ -199,7 +199,7 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base)
 	case 12:
 		exo_fw_no = EXO_FW_VER(9, 1);
 		break;
-	case 13 ... 22: //!TODO: Update on API changes. 22: 19.0.0.
+	case 13 ... 23: //!TODO: Update on API changes. 23: 20.0.0.
 		exo_fw_no = EXO_FW_VER(exo_fw_no - 3, ctxt->exo_ctx.hos_revision);
 		break;
 	}
diff --git a/nyx/nyx_gui/frontend/gui_info.c b/nyx/nyx_gui/frontend/gui_info.c
index ab79aa7..d7351ab 100644
--- a/nyx/nyx_gui/frontend/gui_info.c
+++ b/nyx/nyx_gui/frontend/gui_info.c
@@ -612,7 +612,10 @@ static lv_res_t _create_window_hw_info_status(lv_obj_t *btn)
 		strcpy(fuses_hos_version, "17.0.0 - 18.1.0");
 		break;
 	case 20:
-		strcpy(fuses_hos_version, "19.0.0+");
+		strcpy(fuses_hos_version, "19.0.0 - 19.0.1");
+		break;
+	case 21:
+		strcpy(fuses_hos_version, "20.0.0+");
 		break;
 	case 255:
 		strcpy(fuses_hos_version, "#FFD000 Overburnt#");
diff --git a/nyx/nyx_gui/hos/hos.c b/nyx/nyx_gui/hos/hos.c
index 284f092..cef7bbe 100644
--- a/nyx/nyx_gui/hos/hos.c
+++ b/nyx/nyx_gui/hos/hos.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2018 naehrwert
  * Copyright (c) 2018 st4rk
  * Copyright (c) 2018 Ced2911
- * Copyright (c) 2018-2024 CTCaer
+ * Copyright (c) 2018-2025 CTCaer
  * Copyright (c) 2018 balika011
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -76,7 +76,7 @@ static const u8 master_kekseed_620[SE_KEY_128_SIZE] =
 
 //!TODO: Update on mkey changes.
 static const u8 master_kekseed_t210_max[SE_KEY_128_SIZE] =
-	{ 0xD7, 0x63, 0x74, 0x46, 0x4E, 0xBA, 0x78, 0x0A, 0x7C, 0x9D, 0xB3, 0xE8, 0x7A, 0x3D, 0x71, 0xE3 }; // 19.0.0.
+	{ 0xA1, 0x7D, 0x34, 0xDB, 0x2D, 0x9D, 0xDA, 0xE5, 0xF8, 0x15, 0x63, 0x4C, 0x8F, 0xE7, 0x6C, 0xD8 }; // 20.0.0.
 
 //!TODO: Update on mkey changes.
 static const u8 master_kekseed_t210b01[HOS_KB_VERSION_MAX - HOS_KB_VERSION_600 + 1][SE_KEY_128_SIZE] = {
@@ -94,6 +94,7 @@ static const u8 master_kekseed_t210b01[HOS_KB_VERSION_MAX - HOS_KB_VERSION_600 +
 	{ 0x8D, 0xEE, 0x9E, 0x11, 0x36, 0x3A, 0x9B, 0x0A, 0x6A, 0xC7, 0xBB, 0xE9, 0xD1, 0x03, 0xF7, 0x80 }, // 17.0.0.
 	{ 0x4F, 0x41, 0x3C, 0x3B, 0xFB, 0x6A, 0x01, 0x2A, 0x68, 0x9F, 0x83, 0xE9, 0x53, 0xBD, 0x16, 0xD2 }, // 18.0.0.
 	{ 0x31, 0xBE, 0x25, 0xFB, 0xDB, 0xB4, 0xEE, 0x49, 0x5C, 0x77, 0x05, 0xC2, 0x36, 0x9F, 0x34, 0x80 }, // 19.0.0.
+	{ 0x1A, 0x31, 0x62, 0x87, 0xA8, 0x09, 0xCA, 0xF8, 0x69, 0x15, 0x45, 0xC2, 0x6B, 0xAA, 0x5A, 0x8A }, // 20.0.0.
 };
 
 static const u8 console_keyseed[SE_KEY_128_SIZE] =
@@ -126,6 +127,7 @@ static const u8 mkey_vectors[HOS_KB_VERSION_MAX + 1][SE_KEY_128_SIZE] = {
 	{ 0x25, 0x12, 0x8B, 0xCB, 0xB5, 0x46, 0xA1, 0xF8, 0xE0, 0x52, 0x15, 0xB7, 0x0B, 0x57, 0x00, 0xBD }, // Mkey 15 encrypted with mkey 16.
 	{ 0x58, 0x15, 0xD2, 0xF6, 0x8A, 0xE8, 0x19, 0xAB, 0xFB, 0x2D, 0x52, 0x9D, 0xE7, 0x55, 0xF3, 0x93 }, // Mkey 16 encrypted with mkey 17.
 	{ 0x4A, 0x01, 0x3B, 0xC7, 0x44, 0x6E, 0x45, 0xBD, 0xE6, 0x5E, 0x2B, 0xEC, 0x07, 0x37, 0x52, 0x86 }, // Mkey 17 encrypted with mkey 18.
+	{ 0x97, 0xE4, 0x11, 0xAB, 0x22, 0x72, 0x1A, 0x1F, 0x70, 0x5C, 0x00, 0xB3, 0x96, 0x30, 0x05, 0x28 }, // Mkey 18 encrypted with mkey 19.
 };
 
 //!TODO: Update on mkey changes.
@@ -146,6 +148,7 @@ static const u8 new_console_keyseed[HOS_KB_VERSION_MAX - HOS_KB_VERSION_400 + 1]
 	{ 0xDA, 0xB9, 0xD6, 0x77, 0x52, 0x2D, 0x1F, 0x78, 0x73, 0xC9, 0x98, 0x5B, 0x06, 0xFE, 0xA0, 0x52 }, // 17.0.0 New Device Key Source.
 	{ 0x14, 0xF5, 0xA5, 0xD0, 0x73, 0x6D, 0x44, 0x80, 0x5F, 0x31, 0x5A, 0x8F, 0x1E, 0xD4, 0x0D, 0x63 }, // 18.0.0 New Device Key Source.
 	{ 0x07, 0x38, 0x9A, 0xEC, 0x9C, 0xBD, 0x50, 0x4A, 0x4C, 0x1F, 0x04, 0xDA, 0x40, 0x68, 0x29, 0xE3 }, // 19.0.0 New Device Key Source.
+	{ 0xA3, 0x6B, 0x0A, 0xB5, 0x6F, 0x57, 0x4C, 0x5E, 0x00, 0xFD, 0x56, 0x21, 0xF5, 0x06, 0x6B, 0xD1 }, // 20.0.0 New Device Key Source.
 };
 
 //!TODO: Update on mkey changes.
@@ -166,6 +169,7 @@ static const u8 new_console_kekseed[HOS_KB_VERSION_MAX - HOS_KB_VERSION_400 + 1]
 	{ 0x21, 0xD6, 0x35, 0xF1, 0x0F, 0x7A, 0xF0, 0x5D, 0xDF, 0x79, 0x1C, 0x7A, 0xE4, 0x32, 0x82, 0x9E }, // 17.0.0 New Device Keygen Source.
 	{ 0xE7, 0x85, 0x8C, 0xA2, 0xF4, 0x49, 0xCB, 0x07, 0xD1, 0x8E, 0x48, 0x1B, 0xE8, 0x1E, 0x28, 0x3B }, // 18.0.0 New Device Keygen Source.
 	{ 0x9B, 0xA5, 0xFD, 0x74, 0x7F, 0xCD, 0x23, 0xD1, 0xD9, 0xBD, 0x6C, 0x51, 0x72, 0x5F, 0x3D, 0x1F }, // 19.0.0 New Device Keygen Source.
+	{ 0xDA, 0xFB, 0x61, 0x39, 0x48, 0x2D, 0xC2, 0x7E, 0x0D, 0x8E, 0x8F, 0x98, 0x57, 0x20, 0xB8, 0x15 }, // 20.0.0 New Device Keygen Source.
 };
 
 static const u8 gen_keyseed[SE_KEY_128_SIZE] =
@@ -269,7 +273,7 @@ static void _hos_eks_save()
 		}
 
 		// Get keys.
-		u8 *keys = (u8 *)calloc(2, SZ_4K);
+		u8 *keys = (u8 *)zalloc(SZ_8K);
 		se_get_aes_keys(keys + SZ_4K, keys, SE_KEY_128_SIZE);
 
 		// Set magic and personalized info.
@@ -333,21 +337,6 @@ out:
 	}
 }
 
-int hos_keygen_t210b01(u32 kb)
-{
-	// Use SBK as Device key 4x unsealer and KEK for mkey in T210B01 units.
-	se_aes_unwrap_key(10, 14, console_keyseed_4xx);
-
-	// Derive master key.
-	se_aes_unwrap_key(7, 12, master_kekseed_t210b01[kb - HOS_KB_VERSION_600]);
-	se_aes_unwrap_key(7, 7,  master_keyseed_retail);
-
-	// Derive latest pkg2 key.
-	se_aes_unwrap_key(8, 7, package2_keyseed);
-
-	return 1;
-}
-
 int hos_keygen(void *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
 {
 	u32 retries = 0;
@@ -358,8 +347,21 @@ int hos_keygen(void *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
 	if (kb > HOS_KB_VERSION_MAX)
 		return 0;
 
+	// Do Mariko keygen.
 	if (h_cfg.t210b01)
-		return hos_keygen_t210b01(kb);
+	{
+		// Use SBK as Device key 4x unsealer and KEK for mkey in T210B01 units.
+		se_aes_unwrap_key(10, 14, console_keyseed_4xx);
+
+		// Derive master key.
+		se_aes_unwrap_key(7, 12, master_kekseed_t210b01[kb - HOS_KB_VERSION_600]);
+		se_aes_unwrap_key(7, 7,  master_keyseed_retail);
+
+		// Derive latest pkg2 key.
+		se_aes_unwrap_key(8, 7, package2_keyseed);
+
+		return 1;
+	}
 
 	// Do Erista keygen.
 
diff --git a/nyx/nyx_gui/hos/hos.h b/nyx/nyx_gui/hos/hos.h
index 55b4c9b..bdc82b9 100644
--- a/nyx/nyx_gui/hos/hos.h
+++ b/nyx/nyx_gui/hos/hos.h
@@ -46,7 +46,8 @@ enum {
 	HOS_KB_VERSION_1700 = 16,
 	HOS_KB_VERSION_1800 = 17,
 	HOS_KB_VERSION_1900 = 18,
-	HOS_KB_VERSION_MAX  = HOS_KB_VERSION_1900
+	HOS_KB_VERSION_2000 = 19,
+	HOS_KB_VERSION_MAX  = HOS_KB_VERSION_2000
 };
 
 #define HOS_TSEC_VERSION 4 //! TODO: Update on TSEC Root Key changes.
diff --git a/nyx/nyx_gui/hos/pkg1.c b/nyx/nyx_gui/hos/pkg1.c
index 80602cd..f0a4d53 100644
--- a/nyx/nyx_gui/hos/pkg1.c
+++ b/nyx/nyx_gui/hos/pkg1.c
@@ -67,7 +67,8 @@ static const pkg1_id_t _pkg1_ids[] = {
 	{ "20230111", 15, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 16.0.0 - 16.1.0.
 	{ "20230906", 16, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 17.0.0 - 17.0.1.
 	{ "20240207", 17, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 18.0.0 - 18.1.0.
-	{ "20240808", 18, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 19.0.0+
+	{ "20240808", 18, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 19.0.0 - 19.0.1.
+	{ "20250206", 19, 0x0E00, 0x6FE0, 0x40030000, 0x4003E000 }, // 20.0.0+
 };
 
 const pkg1_id_t *pkg1_identify(u8 *pkg1, char *build_date)
diff --git a/nyx/nyx_gui/hos/pkg2.c b/nyx/nyx_gui/hos/pkg2.c
index c0d2c6f..7b6d6cb 100644
--- a/nyx/nyx_gui/hos/pkg2.c
+++ b/nyx/nyx_gui/hos/pkg2.c
@@ -115,6 +115,8 @@ static const u8 mkey_vector_7xx[HOS_KB_VERSION_MAX - HOS_KB_VERSION_810 + 1][SE_
 	{ 0x58, 0x15, 0xD2, 0xF6, 0x8A, 0xE8, 0x19, 0xAB, 0xFB, 0x2D, 0x52, 0x9D, 0xE7, 0x55, 0xF3, 0x93 },
 	// Master key 17 encrypted with 18. (18.0.0 with 19.0.0)
 	{ 0x4A, 0x01, 0x3B, 0xC7, 0x44, 0x6E, 0x45, 0xBD, 0xE6, 0x5E, 0x2B, 0xEC, 0x07, 0x37, 0x52, 0x86 },
+	// Master key 18 encrypted with 19. (19.0.0 with 20.0.0)
+	{ 0x97, 0xE4, 0x11, 0xAB, 0x22, 0x72, 0x1A, 0x1F, 0x70, 0x5C, 0x00, 0xB3, 0x96, 0x30, 0x05, 0x28 },
 };
 
 static bool _pkg2_key_unwrap_validate(pkg2_hdr_t *tmp_test, pkg2_hdr_t *hdr, u8 src_slot, u8 *mkey, const u8 *key_seed)