--- Net2/arch/i386/isa/rtc.h	2018/04/24 18:04:01	1.1.1.1
+++ Net2/arch/i386/isa/rtc.h	2018/04/24 18:20:01	1.1.1.3
@@ -33,7 +33,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)rtc.h	7.1 (Berkeley) 5/12/91
+ *	from: @(#)rtc.h	7.1 (Berkeley) 5/12/91
+ *	rtc.h,v 1.3 1993/05/22 08:01:36 cgd Exp
  */
 
 /*
@@ -71,6 +72,13 @@
 #define	 RTCRS_RST	 0x00		/* normal reset */
 #define	 RTCRS_LOAD	 0x04		/* load system */
 
+#define RTC_FDISKETTE	0x10	/* diskette drive type in upper/lower nibble */
+#define	 RTCFDT_NONE	 0		/* none present */
+#define	 RTCFDT_360K	 0x10		/* 360K */
+#define	 RTCFDT_12M	 0x20		/* 1.2M */
+#define	 RTCFDT_720K	 0x30		/* 720K */
+#define	 RTCFDT_144M	 0x40		/* 1.44M */
+
 #define RTC_BASELO	0x15	/* low byte of basemem size */
 #define RTC_BASEHI	0x16	/* high byte of basemem size */
 #define RTC_EXTLO	0x17	/* low byte of extended mem size */