diff --git a/cli/emulator.c b/cli/emulator.c
index 095e5e8..1974456 100644
--- a/cli/emulator.c
+++ b/cli/emulator.c
@@ -26,9 +26,6 @@ int emulator_main(int argc, char *argv[])
 
     lcd_new(&lcd);
 
-    // this might be too much abstraction but it'll let me
-    // test the cpu, rom, and dmg independently and use the cpu
-    // for other non-GB stuff
     dmg_new(&dmg, &cpu, &rom, &lcd);
     cpu.dmg = &dmg;
     // cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
diff --git a/cli/imgui_example.cpp b/cli/imgui_example.cpp
index 55d6fe4..a25a2ad 100644
--- a/cli/imgui_example.cpp
+++ b/cli/imgui_example.cpp
@@ -152,9 +152,6 @@ int main(int argc, char *argv[])
 
     lcd_new(&lcd);
 
-    // this might be too much abstraction but it'll let me
-    // test the cpu, rom, and dmg independently and use the cpu
-    // for other non-GB stuff
     dmg_new(&dmg, &cpu, &rom, &lcd);
     cpu.dmg = &dmg;
     // cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
diff --git a/src/dmg.c b/src/dmg.c
index 8dfffe0..833d6cf 100644
--- a/src/dmg.c
+++ b/src/dmg.c
@@ -262,22 +262,22 @@ void dmg_step(void *_dmg)
                 dmg_request_interrupt(dmg, INT_LCDSTAT);
             }
 
-            // int lcdc = lcd_read(dmg->lcd, REG_LCDC);
-            // if (lcdc & LCDC_ENABLE_BG) {
-            //     render_background(dmg, lcdc);
-            // }
+            int lcdc = lcd_read(dmg->lcd, REG_LCDC);
+            if (lcdc & LCDC_ENABLE_BG) {
+                render_background(dmg, lcdc);
+            }
 
-            // if (lcdc & LCDC_ENABLE_WINDOW) {
-            //     // printf("window\n");
-            // }
+            if (lcdc & LCDC_ENABLE_WINDOW) {
+                // printf("window\n");
+            }
 
-            // lcd_apply_scroll(dmg->lcd);
+            lcd_apply_scroll(dmg->lcd);
 
-            // if (lcdc & LCDC_ENABLE_OBJ) {
-            //     render_objs(dmg);
-            // }
+            if (lcdc & LCDC_ENABLE_OBJ) {
+                render_objs(dmg);
+            }
 
-            // lcd_draw(dmg->lcd);
+            lcd_draw(dmg->lcd);
         }
     } else {
         int scan = lcd_read(dmg->lcd, REG_LY);
diff --git a/system6/CMakeLists.txt b/system6/CMakeLists.txt
index 90698e8..53d87bf 100644
--- a/system6/CMakeLists.txt
+++ b/system6/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.9)
 
 include_directories(../src)
 
-set(CMAKE_CXX_FLAGS "-O3")
+set(CMAKE_C_FLAGS "-O3")
 
 add_application(Emulator
     ../src/bootstrap.c
diff --git a/system6/emulator.c b/system6/emulator.c
index 3bd404f..ea1646b 100644
--- a/system6/emulator.c
+++ b/system6/emulator.c
@@ -89,7 +89,7 @@ void Render(void)
   MoveTo(10, 180);
   char debug[128];
   double ms = execTime / 600.0;
-  sprintf(debug, "10000 insn %d ticks, %f ms per instruction", execTime, ms);
+  sprintf(debug, "10000 in %d ticks, %.2f ms per instruction", execTime, ms);
   C2PStr(debug);
   DrawString(debug);
 }
@@ -102,6 +102,13 @@ void Render(void)
 // 0.000695 second per instruction
 // 0.695 ms per instruction
 
+// REAL GB:
+// 4194304 Hz
+// 1048576 NOPs per second
+// 174763 CALL 16s per second
+// 0.001 ms per NOP
+// 0.006 ms per CALL 16
+
 void StartEmulation(void)
 {
   g_wp = NewWindow(0, &windowBounds, WINDOW_TITLE, true,