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 @@
+#
+/*
+ */
+
+/*
+ *	Memory special file
+ *	minor device 0 is physical memory
+ *	minor device 1 is kernel memory
+ *	minor device 2 is EOF/RATHOLE
+ */
+
+#include "../param.h"
+#include "../user.h"
+#include "../conf.h"
+#include "../seg.h"
+
+mmread(dev)
+{
+	register c, bn, on;
+	int a, d;
+
+	if(dev.d_minor == 2)
+		return;
+	do {
+		bn = lshift(u.u_offset, -6);
+		on = u.u_offset[1] & 077;
+		a = UISA->r[0];
+		d = UISD->r[0];
+		spl7();
+		UISA->r[0] = bn;
+		UISD->r[0] = 077406;
+		if(dev.d_minor == 1)
+			UISA->r[0] = (ka6-6)->r[(bn>>7)&07] + (bn & 0177);
+		c = fuibyte(on);
+		UISA->r[0] = a;
+		UISD->r[0] = d;
+		spl0();
+	} while(u.u_error==0 && passc(c)>=0);
+}
+
+mmwrite(dev)
+{
+	register c, bn, on;
+	int a, d;
+
+	if(dev.d_minor == 2) {
+		c = u.u_count;
+		u.u_count = 0;
+		u.u_base =+ c;
+		dpadd(u.u_offset, c);
+		return;
+	}
+	for(;;) {
+		bn = lshift(u.u_offset, -6);
+		on = u.u_offset[1] & 077;
+		if ((c=cpass())<0 || u.u_error!=0)
+			break;
+		a = UISA->r[0];
+		d = UISD->r[0];
+		spl7();
+		UISA->r[0] = bn;
+		UISD->r[0] = 077406;
+		if(dev.d_minor == 1)
+			UISA->r[0] = (ka6-6)->r[(bn>>7)&07] + (bn & 0177);
+		suibyte(on, c);
+		UISA->r[0] = a;
+		UISD->r[0] = d;
+		spl0();
+	}
+}