1 files changed, 19 insertions, 19 deletions

diff --git a/src/main.c b/src/main.c
index decd40d..6073a6a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -17,11 +17,17 @@
 // BIOS calls
 //
 
+int bios_vblank_wait();
 int bios_div(int num, int denom);
 
-int normal_div(int num, int denom) {
-    return num / denom;
-};
+int hblank_counter = 0;
+
+void
+irs_hblank_func() {
+    u16 clr = (DISP_VCOUNT / 8);
+    PAL_BUFFER_BG[0] = rgb15(clr, 0, 31 - clr);
+    hblank_counter++;
+}
 
 int main(void) {
     // Configure the display in mode 0 to show OBJs, where tile memory is
@@ -36,28 +42,22 @@ int main(void) {
     // Initialize text engine.
     txt_init(0, COLOR_RED, 0);
 
-    size_t n_iter = 1000;
-    profile_start();
-    int test = 0;
-    for (size_t i = 0; i < n_iter; ++i) {
-        txt_printf("Bios div:   %d\n", bios_div(5 * i, 5));
-    }
-    u32 bios_div_perf = profile_stop();
-
-    profile_start();
-    for (size_t i = 0; i < n_iter; ++i) {
-        txt_printf("Code div:   %d\n", normal_div(5 * i, 5));
-    }
-    u32 code_perf = profile_stop();
-
-    txt_printf("C code div perf:   %d\n", code_perf);
-    txt_printf("BIOS div perf:     %d\n", bios_div_perf);
+    // Register interrupts.
+    irq_init();
+    irs_set(IRQ_HBLANK, irs_hblank_func);
 
     int frame_counter = 0;
     while(true) {
+        // bios_vblank_wait();
         wait_vsync();
         poll_keys();
 
+        txt_position(0, 1);
+        txt_clear_line();
+        txt_printf(" HBlank counter: %d\n", hblank_counter);
+        txt_clear_line();
+        txt_printf(" Frame counter: %d", frame_counter);
+
         frame_counter++;
         // update_button_sprites();
     };