Index: new_tests/OFScryptTests.m
==================================================================
--- new_tests/OFScryptTests.m
+++ new_tests/OFScryptTests.m
@@ -103,20 +103,26 @@
 	0xDF, 0xDF, 0xFA, 0x3F, 0xED, 0xE2, 0x14, 0x42, 0xFC, 0xD0, 0x06, 0x9D,
 	0xED, 0x09, 0x48, 0xF8, 0x32, 0x6A, 0x75, 0x3A, 0x0F, 0xC8, 0x1F, 0x17,
 	0xE8, 0xD3, 0xE0, 0xFB, 0x2E, 0x0D, 0x36, 0x28, 0xCF, 0x35, 0xE2, 0x0C,
 	0x38, 0xD1, 0x89, 0x06
 };
+/* Nintendo DS does not have enough RAM for the second test vector. */
+#ifndef OF_NINTENDO_DS
 static const unsigned char testVector2[64] = {
 	0xFD, 0xBA, 0xBE, 0x1C, 0x9D, 0x34, 0x72, 0x00, 0x78, 0x56, 0xE7, 0x19,
 	0x0D, 0x01, 0xE9, 0xFE, 0x7C, 0x6A, 0xD7, 0xCB, 0xC8, 0x23, 0x78, 0x30,
 	0xE7, 0x73, 0x76, 0x63, 0x4B, 0x37, 0x31, 0x62, 0x2E, 0xAF, 0x30, 0xD9,
 	0x2E, 0x22, 0xA3, 0x88, 0x6F, 0xF1, 0x09, 0x27, 0x9D, 0x98, 0x30, 0xDA,
 	0xC7, 0x27, 0xAF, 0xB9, 0x4A, 0x83, 0xEE, 0x6D, 0x83, 0x60, 0xCB, 0xDF,
 	0xA2, 0xCC, 0x06, 0x40
 };
-/* The third test vector is too expensive for m68k. */
-#ifndef OF_M68K
+#endif
+/*
+ * The third test vector is too expensive for m68k.
+ * Nintendo DS does not have enough RAM for the third test vector.
+ */
+#if !defined(OF_M68K) && !defined(OF_NINTENDO_DS)
 static const unsigned char testVector3[64] = {
 	0x70, 0x23, 0xBD, 0xCB, 0x3A, 0xFD, 0x73, 0x48, 0x46, 0x1C, 0x06, 0xCD,
 	0x81, 0xFD, 0x38, 0xEB, 0xFD, 0xA8, 0xFB, 0xBA, 0x90, 0x4F, 0x8E, 0x3E,
 	0xA9, 0xB5, 0x43, 0xF6, 0x54, 0x5D, 0xA1, 0xF2, 0xD5, 0x43, 0x29, 0x55,
 	0x61, 0x3F, 0x0F, 0xCF, 0x62, 0xD4, 0x97, 0x05, 0x24, 0x2A, 0x9A, 0xF9,
@@ -181,10 +187,12 @@
 	});
 
 	OTAssertEqual(memcmp(output, testVector1, 64), 0);
 }
 
+/* Nintendo DS does not have enough RAM for the second test vector. */
+#ifndef OF_NINTENDO_DS
 - (void)testRFC7941TestVector2
 {
 	unsigned char output[64];
 
 	OFScrypt((OFScryptParameters){
@@ -200,13 +208,17 @@
 		.allowsSwappableMemory = true
 	});
 
 	OTAssertEqual(memcmp(output, testVector2, 64), 0);
 }
+#endif
 
-/* The third test vector is too expensive for m68k. */
-#ifndef OF_M68K
+/*
+ * The third test vector is too expensive for m68k.
+ * Nintendo DS does not have enough RAM for the third test vector.
+ */
+#if !defined(OF_M68K) && !defined(OF_NINTENDO_DS)
 - (void)testRFC7941TestVector3
 {
 	unsigned char output[64];
 
 	OFScrypt((OFScryptParameters){

ADDED   new_tests/testfile.txt
Index: new_tests/testfile.txt
==================================================================
--- new_tests/testfile.txt
+++ new_tests/testfile.txt
@@ -0,0 +1,1 @@
+testäöü

Index: src/OFStdIOStream.m
==================================================================
--- src/OFStdIOStream.m
+++ src/OFStdIOStream.m
@@ -428,11 +428,11 @@
 	return OFMaxRetainCount;
 }
 
 - (bool)hasTerminal
 {
-#if defined(OF_WII) || defined(OF_NINTENDO_3DS)
+#if defined(OF_WII) || defined(OF_NINTENDO_DS) || defined(OF_NINTENDO_3DS)
 	return true;
 #elif defined(HAVE_ISATTY) && !defined(OF_WII_U)
 	return isatty(_fd);
 #else
 	return false;

Index: src/OFString+PathAdditions.m
==================================================================
--- src/OFString+PathAdditions.m
+++ src/OFString+PathAdditions.m
@@ -19,11 +19,11 @@
 
 #if defined(OF_WINDOWS) || defined(OF_MSDOS) || defined(OF_MINT)
 # import "platform/Windows/OFString+PathAdditions.m"
 #elif defined(OF_AMIGAOS)
 # import "platform/AmigaOS/OFString+PathAdditions.m"
-#elif defined(OF_NINTENDO_3DS) || defined(OF_WII) || \
-    defined(OF_NINTENDO_SWITCH)
+#elif defined(OF_WII) || defined(OF_NINTENDO_DS) || \
+    defined(OF_NINTENDO_3DS) || defined(OF_NINTENDO_SWITCH)
 # import "platform/libfat/OFString+PathAdditions.m"
 #else
 # import "platform/POSIX/OFString+PathAdditions.m"
 #endif

Index: src/test/OTAppDelegate.m
==================================================================
--- src/test/OTAppDelegate.m
+++ src/test/OTAppDelegate.m
@@ -32,10 +32,16 @@
 # define asm __asm__
 # include <gccore.h>
 # include <wiiuse/wpad.h>
 # undef asm
 #endif
+
+#ifdef OF_NINTENDO_DS
+# define asm __asm__
+# include <nds.h>
+# undef asm
+#endif
 
 #ifdef OF_NINTENDO_3DS
 /* Newer versions of libctru started using id as a parameter name. */
 # define id id_3ds
 # include <3ds.h>
@@ -88,10 +94,12 @@
 	if (mode->viTVMode & VI_NON_INTERLACE)
 		VIDEO_WaitVSync();
 
 	CON_InitEx(mode, 2, 2, mode->fbWidth - 4, mode->xfbHeight - 4);
 	VIDEO_ClearFrameBuffer(mode, nextFB, COLOR_BLACK);
+#elif defined(OF_NINTENDO_DS)
+	consoleDemoInit();
 #elif defined(OF_NINTENDO_3DS)
 	gfxInitDefault();
 	atexit(gfxExit);
 
 	consoleInit(GFX_TOP, NULL);
@@ -235,10 +243,21 @@
 
 			if (WPAD_ButtonsDown(0) & WPAD_BUTTON_A)
 				break;
 
 			VIDEO_WaitVSync();
+		}
+#elif defined(OF_NINTENDO_DS)
+		[OFStdOut setForegroundColor: [OFColor silver]];
+		[OFStdOut writeLine: @"Press A to continue"];
+
+		for (;;) {
+			swiWaitForVBlank();
+			scanKeys();
+
+			if (keysDown() & KEY_A)
+				break;
 		}
 #elif defined(OF_NINTENDO_3DS)
 		[OFStdOut setForegroundColor: [OFColor silver]];
 		[OFStdOut writeLine: @"Press A to continue"];
 
@@ -474,10 +493,21 @@
 
 		if (WPAD_ButtonsDown(0) & WPAD_BUTTON_HOME)
 			break;
 
 		VIDEO_WaitVSync();
+	}
+#elif defined(OF_NINTENDO_DS)
+	[OFStdOut setForegroundColor: [OFColor silver]];
+	[OFStdOut writeLine: @"Press start button to exit"];
+
+	for (;;) {
+		swiWaitForVBlank();
+		scanKeys();
+
+		if (keysDown() & KEY_START)
+			break;
 	}
 #elif defined(OF_NINTENDO_3DS)
 	[OFStdOut setForegroundColor: [OFColor silver]];
 	[OFStdOut writeLine: @"Press start button to exit"];