more byte poke tests

emma/src/chip8/video.rs

@@ -251,6 +251,17 @@ mod test {
         }
 
         let test_offset = (x_offset * 64 + y_offset) as u16;
+        println!("TEST OFFSET = {test_offset}");
+        assert!(!v.peek(test_offset));
+        assert!(!v.peek(test_offset + 1));
+        assert!(!v.peek(test_offset + 2));
+        assert!(!v.peek(test_offset + 3));
+        assert!(!v.peek(test_offset + 4));
+        assert!(!v.peek(test_offset + 5));
+        assert!(!v.peek(test_offset + 6));
+        assert!(!v.peek(test_offset + 7));
+
+        let test_offset= test_offset + 0x40;
         assert!(v.peek(test_offset));
         assert!(v.peek(test_offset + 1));
         assert!(v.peek(test_offset + 2));
@@ -260,6 +271,7 @@ mod test {
         assert!(v.peek(test_offset + 6));
         assert!(v.peek(test_offset + 7));
 
+
     }
 
     #[test]