+/**\r
+ Writes a value to Debug Register 1 (DR1).\r
+\r
+ Writes and returns a new value to DR1. This function is only available on\r
+ IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.\r
+\r
+ @param Dr1 The value to write to Dr1.\r
+\r
+ @return The value written to Debug Register 1 (DR1).\r
+\r
+**/\r