diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+/spider-tests.code-workspace
diff --git a/calling-convention/calling-convention.ipynb b/calling-convention/calling-convention.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "1c7a11d9",
+   "metadata": {},
+   "source": [
+    "This test will test (lol) the calling convention in Spider.\n",
+    "As defined, it will use the CPU as a python object.\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b9c572cd",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# The state of the spider vm in a simple\n",
+    "# python object abstraction\n",
+    "spider_vm = {\n",
+    "    'regs':{\n",
+    "        'RA':0,\n",
+    "        'RB':0,\n",
+    "        'RC':0,\n",
+    "        'RD':0,\n",
+    "        'RX':0,\n",
+    "        'RY':0,\n",
+    "        'R0':0,\n",
+    "        'R1':0,\n",
+    "        'R2':0,\n",
+    "        'R3':0,\n",
+    "        'R4':0,\n",
+    "        'R5':0,\n",
+    "        'R6':0,\n",
+    "        'R7':0,\n",
+    "        'R8':0,\n",
+    "        'R9':0,\n",
+    "        'RF':0,\n",
+    "        'RI':0,\n",
+    "        'RS':0,\n",
+    "        'RZ':0,\n",
+    "        'RE':0,\n",
+    "        'RH':0,\n",
+    "        'RV':0,\n",
+    "        'RM':0,\n",
+    "    },\n",
+    "    'stack': [],\n",
+    "}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a1ddd324",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Input parameters, measured as bits\n",
+    "# For simplicity\n",
+    "# 1 boolean -> 1 bit\n",
+    "# 1 byte -> 8 bits\n",
+    "input_params = [ {'name':'asd','size':8} ]\n",
+    "\n",
+    "# Define the return types here\n",
+    "ouput_return = [ {'name':'ret1','size':8} ]"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "bbe2c356",
+   "metadata": {},
+   "source": [
+    "Now, on this function it will perform the tasks of ordering the registers and stack based on the parameters."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "02a2ad1a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# TODO!!!\n",
+    "def do_function_call(input_params:list, output_return:list):\n",
+    "    pass"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ac6440ca",
+   "metadata": {},
+   "source": [
+    "Now, unwind the stack and stuff to make sure the machine goes back to its previous state BEFORE the function"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d2e4ce44",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# TODO !!!\n",
+    "def undo_function_call(input_params:list, output_return:list):\n",
+    "    pass"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "5397697f",
+   "metadata": {},
+   "source": [
+    "VERY GOOD\n",
+    "Now check the state of the machine before and after\n",
+    "\n",
+    "Try different combinations: One function call, multiple function calls, recursive calls, etc."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b58fbf72",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2860c30b",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}