diff --git a/Makefile.blocksds.arm7 b/Makefile.blocksds.arm7
index cb3d206..c08c3d2 100644
--- a/Makefile.blocksds.arm7
+++ b/Makefile.blocksds.arm7
@@ -71,7 +71,7 @@ SOURCES_CPP	:= $(shell find -L $(SOURCEDIRS) -name "*.cpp")
 # Compiler and linker flags
 # -------------------------
 
-DEFINES		+= -D__NDS__ -DARM7
+DEFINES		+= -D__NDS__ -D__BLOCKSDS__ -DARM7
 
 ARCH		:= -mcpu=arm7tdmi
 
diff --git a/Makefile.blocksds.arm9 b/Makefile.blocksds.arm9
index c4a8e45..c2f08d9 100644
--- a/Makefile.blocksds.arm9
+++ b/Makefile.blocksds.arm9
@@ -93,7 +93,7 @@ SOURCES_CPP	:= $(shell find -L $(SOURCEDIRS) -maxdepth 1 -name "*.cpp")
 # Compiler and linker flags
 # -------------------------
 
-DEFINES		+= -D__NDS__ -DARM9 -DBLOCKSDS
+DEFINES		+= -D__NDS__ -DARM9 -D__BLOCKSDS__
 
 ARCH		:= -mcpu=arm946e-s+nofp
 
@@ -137,7 +137,7 @@ endif
 endif
 
 LDFLAGS		:= -Wl,--defsym=vfprintf=__i_vfprintf -Wl,--defsym=vfscanf=__i_vfscanf \
-		   -mthumb -mthumb-interwork $(LIBDIRSFLAGS) \
+		   -mthumb -mthumb-interwork $(LIBDIRSFLAGS) $(ARCH) \
 		   -Wl,-Map,$(MAP) -Wl,--gc-sections -nostdlib \
 		   -T$(BLOCKSDS)/sys/crts/ds_arm9.mem \
 		   -T$(BLOCKSDS)/sys/crts/ds_arm9.ld \
diff --git a/arm7/source/main.c b/arm7/source/main.c
index 1ab4c63..8829d9c 100644
--- a/arm7/source/main.c
+++ b/arm7/source/main.c
@@ -122,17 +122,20 @@ void powerButtonCB() {
 }
 
 int main() {
+#ifdef __BLOCKSDS__
+	enableSound();
+#else
 	dmaFillWords(0, (void*)0x04000400, 0x100);
 
 	REG_SOUNDCNT |= SOUND_ENABLE;
 	writePowerManagement(PM_CONTROL_REG, ( readPowerManagement(PM_CONTROL_REG) & ~PM_SOUND_MUTE ) | PM_SOUND_AMP );
 	powerOn(POWER_SOUND);
+#endif
 
 	readUserSettings();
 	ledBlink(0);
 
 	irqInit();
-	initClockIRQ();
 	fifoInit();
 	touchInit();
 
@@ -141,10 +144,16 @@ int main() {
 	fifoSetValue32Handler(UXNDS_FIFO_CHANNEL, fifo_handler, NULL);
 	installSystemFIFO();
 
-	irqSet(IRQ_VCOUNT, VcountHandler);
+	irqSet(IRQ_VBLANK, VcountHandler);
 	irqSet(IRQ_TIMER0, apu_handler);
 
+#ifdef __BLOCKSDS__
+	initClockIRQTimer(3);
+	irqEnable(IRQ_VBLANK | IRQ_VCOUNT | IRQ_TIMER0);
+#else
+	initClockIRQ();
 	irqEnable(IRQ_VBLANK | IRQ_VCOUNT | IRQ_NETWORK | IRQ_TIMER0);
+#endif
 
 	setPowerButtonCB(powerButtonCB);
 
diff --git a/arm9/source/emulator.c b/arm9/source/emulator.c
index e388e6c..92448e0 100644
--- a/arm9/source/emulator.c
+++ b/arm9/source/emulator.c
@@ -1,5 +1,5 @@
 #include <nds.h>
-#ifdef BLOCKSDS
+#ifdef __BLOCKSDS__
 # include <fatfs.h>
 #else
 # include <fat.h>
diff --git a/arm9/source/stubs.c b/arm9/source/stubs.c
index 22502ba..90ea4ec 100644
--- a/arm9/source/stubs.c
+++ b/arm9/source/stubs.c
@@ -1,6 +1,6 @@
 // Admittedly, this was more useful to reduce filesize before "datetime" device support.
 #if 0
-#ifdef BLOCKSDS
+#ifdef __BLOCKSDS__
 #include <stdint.h>
 
 uint32_t get_fattime(void) {
diff --git a/source/uxn.h b/source/uxn.h
index ef38308..9244188 100644
--- a/source/uxn.h
+++ b/source/uxn.h
@@ -21,7 +21,7 @@ WITH REGARD TO THIS SOFTWARE.
 #define dprintf(...)
 #endif
 
-#ifdef BLOCKSDS
+#ifdef __BLOCKSDS__
 #define iprintf printf
 #define siprintf sprintf
 #define sniprintf snprintf