diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..8320b8b
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "/home/franchioping/NSpire/Ndless/ndless-sdk/include/*"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/clang",
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "linux-gcc-arm"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/source/main.S b/source/main.S
index a78047b..af709f2 100644
--- a/source/main.S
+++ b/source/main.S
@@ -12,6 +12,7 @@ main:
 	mov	r9, sp
     sub sp, sp, #s_SIZE // Reserve space for state ADDED
 	
+	
 	mov	r4, #0
 	mov	r6, #s_SIZE
 1:	subs	r6, r6, #4
@@ -19,6 +20,9 @@ main:
 	bne	1b
 	str	r5, [r9, #s_saved_sp]
 
+
+
+
 	@ Get our folder path
 	add	r4, r9, #s_path
 	mov	r2, r4
diff --git a/testing/.buildver b/testing/.buildver
new file mode 100644
index 0000000..7ed6ff8
--- /dev/null
+++ b/testing/.buildver
@@ -0,0 +1 @@
+5
diff --git a/testing/Makefile b/testing/Makefile
new file mode 100644
index 0000000..e0b1951
--- /dev/null
+++ b/testing/Makefile
@@ -0,0 +1,61 @@
+DEBUG = FALSE
+
+BLD_FILE ?= .buildver                                                          
+
+# Initiate BLD_FILE if not exists                                              
+buildver_create := $(shell if ! test -f $(BLD_FILE); then echo 0 > $(BLD_FILE); fi)
+
+# Prepare callable function. This function updates BLD_FILE
+buildver = $(shell echo $$(($$(cat $(BLD_FILE)) + 1)) > $(BLD_FILE))
+
+VER = buildver
+
+GCC = nspire-gcc
+AS  = nspire-as
+GXX = nspire-g++
+LD  = nspire-ld
+GENZEHN = genzehn
+
+EXE = nespire_mod_$(shell cat $(BLD_FILE))
+
+
+GCCFLAGS = -Wall -W -marm
+LDFLAGS =
+ZEHNFLAGS = --name "$(EXE)"
+
+ifeq ($(DEBUG),FALSE)
+	GCCFLAGS += -Os
+else
+	GCCFLAGS += -O0 -g
+endif
+
+OBJS = $(patsubst %.c, %.o, $(shell find . -name \*.c))
+OBJS += $(patsubst %.cpp, %.o, $(shell find . -name \*.cpp))
+OBJS += $(patsubst %.S, %.o, $(shell find . -name \*.S))
+DISTDIR = .
+vpath %.tns $(DISTDIR)
+vpath %.elf $(DISTDIR)
+
+all: $(EXE).tns
+
+%.o: %.c
+	$(GCC) $(GCCFLAGS) -c $< -o $@
+
+%.o: %.cpp
+	$(GXX) $(GCCFLAGS) -c $< -o $@
+	
+%.o: %.S
+	$(AS) -c $< -o $@
+
+$(EXE).elf: $(OBJS)
+	mkdir -p $(DISTDIR)
+	$(LD) $^ -o $@ $(LDFLAGS)
+
+$(EXE).tns: $(EXE).elf
+	$(GENZEHN) --input $^ --output $@.zehn $(ZEHNFLAGS)
+	$(call buildver)
+	make-prg $@.zehn $@
+	rm $@.zehn
+
+clean:
+	rm -f $(OBJS) $(DISTDIR)/$(EXE).tns $(DISTDIR)/$(EXE).elf $(DISTDIR)/$(EXE).zehn nespire_mod_*.elf nespire_mod_*.tns
diff --git a/testing/arm_util.S b/testing/arm_util.S
new file mode 100644
index 0000000..c46e942
--- /dev/null
+++ b/testing/arm_util.S
@@ -0,0 +1,3 @@
+.global arm_util_stuff
+arm_util_stuff:
+    bx lr
\ No newline at end of file
diff --git a/testing/arm_util.o b/testing/arm_util.o
new file mode 100644
index 0000000..191a51f
Binary files /dev/null and b/testing/arm_util.o differ
diff --git a/testing/main.S b/testing/main.S
new file mode 100644
index 0000000..ace053c
--- /dev/null
+++ b/testing/main.S
@@ -0,0 +1,17 @@
+.extern arm_util_stuff
+
+
+.global main
+main:
+    push	{r4-r11, lr}
+   	mov	r9, sp
+
+
+    bl util_stuff
+
+
+    mov	sp, r9
+	pop	{r4-r11, pc}
+
+
+
diff --git a/testing/main.o b/testing/main.o
new file mode 100644
index 0000000..6e4780c
Binary files /dev/null and b/testing/main.o differ
diff --git a/testing/nespire_mod_4.elf b/testing/nespire_mod_4.elf
new file mode 100755
index 0000000..420d315
Binary files /dev/null and b/testing/nespire_mod_4.elf differ
diff --git a/testing/nespire_mod_4.tns b/testing/nespire_mod_4.tns
new file mode 100644
index 0000000..252a048
Binary files /dev/null and b/testing/nespire_mod_4.tns differ
diff --git a/testing/util.c b/testing/util.c
new file mode 100644
index 0000000..3bd0c4f
--- /dev/null
+++ b/testing/util.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <libndls.h>
+
+void util_stuff();
+
+void util_stuff(){
+
+    printf("Hello World!\n");
+
+
+    wait_key_pressed();
+    return;
+}
\ No newline at end of file
diff --git a/testing/util.o b/testing/util.o
new file mode 100644
index 0000000..0406eaf
Binary files /dev/null and b/testing/util.o differ