Index: src/sys/boot/i386/boot0/Makefile
===================================================================
RCS file: /home/ncvs/src/sys/boot/i386/boot0/Makefile,v
retrieving revision 1.32
diff -u -r1.32 Makefile
--- src/sys/boot/i386/boot0/Makefile	25 Apr 2005 17:41:35 -0000	1.32
+++ src/sys/boot/i386/boot0/Makefile	1 Sep 2005 17:12:16 -0000
@@ -45,6 +45,8 @@
 BOOT_BOOT0_COMCONSOLE_SPEED=	"1 << 5 + 3"
 .elif ${BOOT_COMCONSOLE_SPEED} == 110
 BOOT_BOOT0_COMCONSOLE_SPEED=	"0 << 5 + 3"
+.elif ${BOOT_COMCONSOLE_SPEED} == 0
+BOOT_BOOT0_COMCONSOLE_SPEED=	0
 .else
 BOOT_BOOT0_COMCONSOLE_SPEED=	"7 << 5 + 3"
 .endif
Index: src/sys/boot/i386/boot2/Makefile
===================================================================
RCS file: /home/ncvs/src/sys/boot/i386/boot2/Makefile,v
retrieving revision 1.59
diff -u -r1.59 Makefile
--- src/sys/boot/i386/boot2/Makefile	15 Jul 2005 12:22:14 -0000	1.59
+++ src/sys/boot/i386/boot2/Makefile	1 Sep 2005 17:12:16 -0000
@@ -23,7 +23,6 @@
 CFLAGS=	-Os \
 	-fno-guess-branch-probability \
 	-fomit-frame-pointer \
-	-fno-unit-at-a-time \
 	-mno-align-long-strings \
 	-mrtd \
 	-mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 \
Index: src/sys/boot/i386/boot2/boot2.c
===================================================================
RCS file: /home/ncvs/src/sys/boot/i386/boot2/boot2.c,v
retrieving revision 1.74
diff -u -r1.74 boot2.c
--- src/sys/boot/i386/boot2/boot2.c	18 Aug 2005 00:42:45 -0000	1.74
+++ src/sys/boot/i386/boot2/boot2.c	1 Sep 2005 17:12:16 -0000
@@ -63,6 +63,7 @@
 #define RBX_NOINTR	0x1c	/* -n */
 /* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
 #define RBX_DUAL	0x1d	/* -D */
+/* 0x1e is RBX_PROBEKBD (-P).  No longer needed here. */
 /* 0x1f is reserved for log2(RB_BOOTINFO). */
 
 /* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
@@ -73,7 +74,7 @@
 #define PATH_KERNEL	"/boot/kernel/kernel"
 
 #define ARGS		0x900
-#define NOPT		12
+#define NOPT		11
 #define NDEV		3
 #define MEM_BASE	0x12
 #define MEM_EXT 	0x15
@@ -90,13 +91,26 @@
 
 extern uint32_t _end;
 
-static const char optstr[NOPT] = "DhaCgmnprsv"; /* Also 'P', 'S' */
+static const char optstr[NOPT] = {
+    'a',	/* RBX_ASKNAME */
+    'C',	/* RBX_CDROM */
+    'D',	/* RBX_DUAL */
+    'g',	/* RBX_GDB */
+    'h',	/* RBX_SERIAL */
+    'm',	/* RBX_MUTE */
+    'n',	/* RBX_NOINTR */
+    'p',	/* RBX_PAUSE */
+    'r',	/* RBX_DFLTROOT */
+    's',	/* RBX_SINGLE */
+    'v'		/* RBX_VERBOSE */
+};
+
 static const unsigned char flags[NOPT] = {
-    RBX_DUAL,
-    RBX_SERIAL,
     RBX_ASKNAME,
     RBX_CDROM,
+    RBX_DUAL,
     RBX_GDB,
+    RBX_SERIAL,
     RBX_MUTE,
     RBX_NOINTR,
     RBX_PAUSE,
@@ -138,8 +152,8 @@
 static int xgetc(int);
 static int getc(int);
 
-static void memcpy(void *, const void *, int);
-static void
+void memcpy(void *, const void *, int);
+void
 memcpy(void *dst, const void *src, int len)
 {
     const char *s = src;
@@ -388,22 +402,21 @@
 static int
 parse()
 {
-    char *arg = cmd;
-    char *ep, *p, *q;
+    char *arg;
+    char *p, *q;
     const char *cp;
-    unsigned int drv;
-    int c, i, j;
+    unsigned drv;
+    int i, j;
 
-    while ((c = *arg++)) {
-	if (c == ' ' || c == '\t' || c == '\n')
+    for (arg = cmd; *arg; arg++) {
+	if (*arg == ' ' || *arg == '\t' || *arg == '\n')
 	    continue;
 	for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
-	ep = p;
 	if (*p)
-	    *p++ = 0;
-	if (c == '-') {
-	    while ((c = *arg++)) {
-		if (c == 'P') {
+	    *p = '\0';
+	if (*arg == '-') {
+	    for (q = arg + 1; *q; q++) {
+		if (*q == 'P') {
 		    if (*(uint8_t *)PTOV(0x496) & 0x10) {
 			cp = "yes";
 		    } else {
@@ -411,33 +424,42 @@
 			cp = "no";
 		    }
 		    printf("Keyboard: %s\n", cp);
-		    continue;
-		} else if (c == 'S') {
-		    j = 0;
-		    while ((unsigned int)(i = *arg++ - '0') <= 9)
-			j = j * 10 + i;
-		    if (j > 0 && i == -'0') {
+		} else if (*q == 'S') {
+		    for (i = 1, j = 0; q[i] >= '0' && q[i] <= '9'; i++)
+			j = j * 10 + q[i] - '0';
+#if defined(UFS1_ONLY) || defined(UFS2_ONLY)
+		    switch(i) {
+		    case 0:	/* do not change speed */
+		    case 110:	case 150:   case 300:	case 1200:
+		    case 2400:	case 4800:  case 9600:	case 19200:
+		    case 38400:	case 57600: case 115200:
 			comspeed = j;
 			break;
+		    default:	/* invalid speed */
+			return -1;
 		    }
-		    /* Fall through to error below ('S' not in optstr[]). */
+#else
+		    comspeed = j;
+#endif
+		    q += i - 1;
+		} else {
+		    for (i = 0; *q != optstr[i]; i++)
+			if (i == NOPT - 1)
+			    return -1;
+		    opts ^= 1 << flags[i];
 		}
-		for (i = 0; c != optstr[i]; i++)
-		    if (i == NOPT - 1)
-			return -1;
-		opts ^= 1 << flags[i];
 	    }
 	    ioctrl = opts & 1 << RBX_DUAL ? (IO_SERIAL|IO_KEYBOARD) :
 		     opts & 1 << RBX_SERIAL ? IO_SERIAL : IO_KEYBOARD;
-	    if (ioctrl & IO_SERIAL)
-	        sio_init(115200 / comspeed);
+	    if (comspeed && (ioctrl & IO_SERIAL))
+		sio_init(115200 / comspeed);
 	} else {
-	    for (q = arg--; *q && *q != '('; q++);
+	    for (q = arg; *q && *q != '('; q++);
 	    if (*q) {
 		drv = -1;
 		if (arg[1] == ':') {
 		    drv = *arg - '0';
-		    if (drv > 9)
+		    if (drv < 0 || drv > 9)
 			return (-1);
 		    arg += 2;
 		}
@@ -447,32 +469,31 @@
 			    arg[1] != dev_nm[i][1]; i++)
 		    if (i == NDEV - 1)
 			return -1;
-		dsk.type = i;
 		arg += 3;
 		dsk.unit = *arg - '0';
-		if (arg[1] != ',' || dsk.unit > 9)
+		if (arg[1] != ',' || dsk.unit < 0 || dsk.unit > 9)
 		    return -1;
 		arg += 2;
 		dsk.slice = WHOLE_DISK_SLICE;
 		if (arg[1] == ',') {
 		    dsk.slice = *arg - '0' + 1;
-		    if (dsk.slice > NDOSPART)
+		    if (dsk.slice < 1 || dsk.slice > NDOSPART)
 			return -1;
 		    arg += 2;
 		}
 		if (arg[1] != ')')
 		    return -1;
 		dsk.part = *arg - 'a';
-		if (dsk.part > 7)
+		if (dsk.part < 0 || dsk.part > 7)
 		    return (-1);
 		arg += 2;
 		if (drv == -1)
 		    drv = dsk.unit;
-		dsk.drive = (dsk.type <= TYPE_MAXHARD
-			     ? DRV_HARD : 0) + drv;
+		dsk.drive = (i <= TYPE_MAXHARD ? DRV_HARD : 0) + drv;
+		dsk.type = i;
 		dsk_meta = 0;
 	    }
-	    if ((i = ep - arg)) {
+	    if ((i = p - arg)) {
 		if ((size_t)i >= sizeof(kname))
 		    return -1;
 		memcpy(kname, arg, i + 1);
Index: src/sys/boot/i386/libi386/comconsole.c
===================================================================
RCS file: /home/ncvs/src/sys/boot/i386/libi386/comconsole.c,v
retrieving revision 1.11
diff -u -r1.11 comconsole.c
--- src/sys/boot/i386/libi386/comconsole.c	18 Aug 2005 01:39:43 -0000	1.11
+++ src/sys/boot/i386/libi386/comconsole.c	1 Sep 2005 17:12:16 -0000
@@ -96,6 +96,8 @@
 	    if (speed > 0)
 		comc_curspeed = speed;
 	}
+	if (comc_curspeed == 0)
+	    comc_curspeed = comc_getspeed();
 
 	sprintf(speedbuf, "%d", comc_curspeed);
 	unsetenv("comconsole_speed");
@@ -145,7 +147,7 @@
 {
     int speed;
 
-    if (value == NULL || (speed = comc_parsespeed(value)) <= 0) {
+    if (value == NULL || (speed = comc_parsespeed(value)) < 0) {
 	printf("Invalid speed\n");
 	return (CMD_ERROR);
     }
@@ -162,6 +164,8 @@
 comc_setup(int speed)
 {
 
+    if (speed == 0)
+	return;
     comc_curspeed = speed;
 
     outb(COMPORT + com_cfcr, CFCR_DLAB | COMC_FMT);
@@ -182,7 +186,7 @@
     int speed;
 
     speed = strtol(speedstr, &p, 0);
-    if (p == speedstr || *p != '\0' || speed <= 0)
+    if (p == speedstr || *p != '\0' || speed < 0)
 	return (-1);
 
     return (speed);