add directory study

study/linux-travel/MINIX-1.5/1.5/Source/amoeba/kernel/etherplus.h

@@ -0,0 +1,27 @@
+/*
+ * Western Digital Ethercard Plus, or WD8003E card
+ *
+ * This information seems to be guarded like the crown jewels
+ */
+
+struct eplusreg {
+	char	epl_ctlstatus;		/* Control(write) and status(read)   */
+	char	epl_res1[7];
+	char	epl_ea0;		/* Most significant eaddr byte       */
+	char	epl_ea1;
+	char	epl_ea2;
+	char	epl_ea3;
+	char	epl_ea4;
+	char	epl_ea5;		/* Least significant eaddr byte      */
+	char	epl_res2;
+	char	epl_chksum;		/* sum from epl_ea0 upto here is 0xFF   */
+	dp8390	epl_dp8390;		/* NatSemi chip                      */
+};
+
+/* Bits in epl_ctlstatus */
+
+#define CTL_RESET	0x80		/* Software Reset                    */
+#define CTL_MENABLE	0x40		/* Memory Enable                     */
+#define CTL_MEMADDR	0x3F		/* Bits SA18-SA13, SA19 implicit 1   */
+
+#define STA_IIJ		0x7		/* Interrupt Indication Jumpers      */