--- a/spi.inc	Thu Jun 17 23:05:24 2010 +0300
+++ b/spi.inc	Mon Aug 23 01:07:26 2010 +0300
@@ -106,6 +106,7 @@
         rjmp        spi_sr_wait
 
     ; Read
+        ; XXX: wrong, should be head byte?
         ; read+store tail byte
         in          r1, SPDR
         st          -X, r1