From 4297f0733eeec3d6b7dc0f93682e5c8b5d933182 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 15 Jan 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-01-15

---
 boot/dosboot.c | 2 +-
 gnot/segment.h | 1 -
 pc/devvga.c    | 1 +
 pc/segment.h   | 4 +++-
 port/devwren.c | 4 ++--
 5 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/boot/dosboot.c b/boot/dosboot.c
index 85f50a788c21054095f92fc3c7e9e771d3fbd50f..25cc4b6214d10ccd7b7e09e515c721ad4674d1bb 100644
--- a/boot/dosboot.c
+++ b/boot/dosboot.c
@@ -32,7 +32,7 @@ dosboot(void)
 		fatal("bind");
 	if(mount(fd, "/", MAFTER|MCREATE, "#f/fd0disk", "") < 0)
 		if(mount(fd, "/", MAFTER|MCREATE, "#f/fd1disk", "") < 0)
-			if(mount(fd, "/", MAFTER|MCREATE, "#w/hd0dos", "") < 0)
+			if(mount(fd, "/", MAFTER|MCREATE, "#H/hd0dos", "") < 0)
 				fatal("mount");
 	close(fd);
 
diff --git a/gnot/segment.h b/gnot/segment.h
index 6ae272a2e96cd0dc4544f36ae5bb88861210bf3a..e7efd47e66336fbeec3fe6118363d1788f4df6f6 100644
--- a/gnot/segment.h
+++ b/gnot/segment.h
@@ -14,7 +14,6 @@ struct Physseg
 }physseg[] = {
 	{ SG_SHARED,	"lock",		0,	SEGMAXSIZE,	snewpage, 	putpage },
 	{ SG_SHARED,	"shared",	0,	SEGMAXSIZE,	snewpage, 	putpage },
-	{ SG_PHYSICAL,	"kmem",		KZERO,	SEGMAXSIZE,	0,		0 	},
 	{ SG_BSS,	"memory",	0,	SEGMAXSIZE,	snewpage,	putpage },
 	{ 0,		0,		0,	0,		0,		0 	},
 };
diff --git a/pc/devvga.c b/pc/devvga.c
index 35e244a73febb7a81ccf624180440d2a34b474e0..e9763bfb8bfe770bb4a5ae3fba900e26ad1182fc 100644
--- a/pc/devvga.c
+++ b/pc/devvga.c
@@ -495,6 +495,7 @@ setscreen(int maxx, int maxy, int ldepth)
 	p = xalloc(len);
 	if(p == 0)
 		error(Enobitstore);
+	memset(p, 0xff, len);
 	mbb = NULLMBB;
 
 	/*
diff --git a/pc/segment.h b/pc/segment.h
index 6ae272a2e96cd0dc4544f36ae5bb88861210bf3a..dcd217ea16a307838794039c4d5caa4dd63d5732 100644
--- a/pc/segment.h
+++ b/pc/segment.h
@@ -2,6 +2,8 @@
  * Attach segment types
  */
 
+#define PCMEM (KZERO|0xd0000)
+
 typedef struct Physseg Physseg;
 struct Physseg
 {
@@ -14,7 +16,7 @@ struct Physseg
 }physseg[] = {
 	{ SG_SHARED,	"lock",		0,	SEGMAXSIZE,	snewpage, 	putpage },
 	{ SG_SHARED,	"shared",	0,	SEGMAXSIZE,	snewpage, 	putpage },
-	{ SG_PHYSICAL,	"kmem",		KZERO,	SEGMAXSIZE,	0,		0 	},
+	{ SG_PHYSICAL,	"pcmem",	PCMEM,	64*1024,	0,		0,	},
 	{ SG_BSS,	"memory",	0,	SEGMAXSIZE,	snewpage,	putpage },
 	{ 0,		0,		0,	0,		0,		0 	},
 };
diff --git a/port/devwren.c b/port/devwren.c
index f5ccc3df8c8319c99088b1767830783d8c083f95..a752073854c53aa5d300f6e6faa1e545446b5bf3 100644
--- a/port/devwren.c
+++ b/port/devwren.c
@@ -90,9 +90,9 @@ wrengen(Chan *c, Dirtab *tab, long ntab, long s, Dir *dirp)
 
 	pp = &dp->p[s];
 	if(drive & 7)
-		sprint(name, "hd%d.%d%s", drive>>3, drive&7, pp->name);
+		sprint(name, "sd%d.%d%s", drive>>3, drive&7, pp->name);
 	else
-		sprint(name, "hd%d%s", drive>>3, pp->name);
+		sprint(name, "sd%d%s", drive>>3, pp->name);
 	name[NAMELEN] = 0;
 	qid.path = MKQID(drive, s);
 	l = (pp->end - pp->start) * dp->bytes;