Minor update to example used for register bit field.

[pdp11-memory-test] / pdp11_register.h

diff --git a/pdp11_register.h b/pdp11_register.h
index b5a8e79..1fab2e5 100644 (file)
--- a/pdp11_register.h
+++ b/pdp11_register.h
@@ -166,6 +166,12 @@
  * =============================================================================
  */
 
  * =============================================================================
  */
 

+/*
+ * These take the form of "(width),(offset)".  For example, if a field is
+ * 4-bits wide and occupies bits 2-5 (starting from 0), then it would be
+ * defined as "(017),(2)".
+ */
+

 #define MMR0_AB_NONRES (01),(15)
 #define MMR0_AB_PAGLEN (01),(14)
 #define MMR0_AB_RO     (01),(13)
 #define MMR0_AB_NONRES (01),(15)
 #define MMR0_AB_PAGLEN (01),(14)
 #define MMR0_AB_RO     (01),(13)