Add original unix v6

2018-01-27 22:35:41 +09:00
commit 2c7099ee50
664 changed files with 106254 additions and 0 deletions
@@ -0,0 +1,70 @@
+#
+/*
+ */
+
+/*
+ * VT01 driver via DR11C to 11/20
+ */
+
+#include "../param.h"
+#include "../user.h"
+
+int	vtflag;
+
+struct vtreg {
+	int	csr;
+	int	buf;
+};
+
+#define	VTADDR	0167770
+#define	RQINT	01
+#define	BIENABL	040
+#define	SEOF	0100000
+#define	VTPRI	8
+
+vtopen(dev, flag)
+{
+	if (!flag)
+		u.u_error = ENXIO;
+	else
+		VTADDR->csr = BIENABL;
+}
+
+vtclose()
+{
+	VTADDR->buf = SEOF;
+	VTADDR->csr =| RQINT;
+}
+
+vtwrite()
+{
+	register int c;
+	int register count;
+
+	while ((c=cpass()) >= 0) {
+	    retry:
+		for (count=0; count<10; count++)
+			if ((VTADDR->csr&RQINT)==0) {
+				VTADDR->buf = c&0377;
+				VTADDR->csr =| RQINT;
+				goto contin;
+			}
+		spl5();
+		if (VTADDR->csr&RQINT) {
+			vtflag++;
+			sleep(VTADDR, VTPRI);
+		}
+		spl0();
+		goto retry;
+    contin:;
+	}
+}
+
+vtintr()
+{
+	VTADDR->csr =& ~RQINT;
+	if (vtflag) {
+		vtflag = 0;
+		wakeup(VTADDR);
+	}
+}