feat: Buttons + events

wip: malloc

feat: Buttons

src/sys.rs

@@ -16,6 +16,10 @@ extern "C" {
     #[link_name = "_display_message"]
     pub fn display_message(ebx: u32, ecx: u32, edx: u32, edi: u32);
 
+    // 8
+    #[link_name = "_define_button"]
+    pub fn define_button(ebx: u32, ecx: u32, edx: u32, esi: u32);
+
     // 10
     #[link_name = "_wait_event"]
     pub fn wait_event() -> u32;
@@ -27,4 +31,24 @@ extern "C" {
     // 12.2
     #[link_name = "_end_window_draw"]
     pub fn end_window_draw();
+
+    // 17
+    #[link_name = "_get_button_id"]
+    pub fn get_button_id() -> u32;
+
+    // 63.1
+    #[link_name = "_debug_write"]
+    pub fn _debug_write(cl: u8);
+
+    // 68.11
+    #[link_name = "_init_heap"]
+    pub fn init_heap();
+
+    // 68.12
+    #[link_name = "_alloc"]
+    pub fn alloc(size: usize) -> *const u8;
+
+    // 68.13
+    #[link_name = "_free"]
+    pub fn free(block: *const u8) -> bool;
 }