Add comment for clarification

1 files changed, 2 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index cbfa2a7..7c33166 100644
--- a/src/main.c
+++ b/src/main.c
@@ -239,6 +239,8 @@ static inline void
 put_pixel_m4(int x, int y, u8 col_index) {
     int buffer_index = (y * SCREEN_WIDTH + x) / 2;
     u16 *destination = &SCREEN_BUFFER[buffer_index];
+    // Odd pixels will go to the top 8 bits of the destination. Even pixels to
+    // the lower 8 bits.
     int odd = x & 0x1;
     if(odd) {
         *destination= (*destination & 0xFF) | (col_index << 8);