From 1555138647130bc0305e8c910b98f2432df22910 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 1 Apr 2003 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2003-04-01

---
 pc/devarch.c | 6 ++++++
 pc/l.s       | 6 +++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/pc/devarch.c b/pc/devarch.c
index cad297e7e81f77df396242da3c797a11b4e73fb6..ac3c0861c82145e68857c9d2b81ecd4d8f6bd72d 100644
--- a/pc/devarch.c
+++ b/pc/devarch.c
@@ -763,6 +763,7 @@ enum
 	CMpge,
 	CMcoherence,
 	CMi8253set,
+CMrealmode
 };
 
 static Cmdtab archctlmsg[] =
@@ -770,6 +771,7 @@ static Cmdtab archctlmsg[] =
 	CMpge,		"pge",		2,
 	CMcoherence,	"coherence",	2,
 	CMi8253set,	"i8253set",	2,
+CMrealmode, "realmode", 1,
 };
 
 static long
@@ -814,6 +816,10 @@ archctlwrite(Chan*, void *a, long n, vlong)
 		else
 			cmderror(cb, "invalid i2853set ctl");
 		break;
+	case CMrealmode:
+		if(strcmp(cb->f[1], "realmode") == 0)
+			realmode();
+		break;
 	}
 	free(cb);
 	poperror();
diff --git a/pc/l.s b/pc/l.s
index f58c31de59d57052840bdbbc26a538764d82d525..70a79b7c8a820f68ec3ccdec09a65cee95da2361 100644
--- a/pc/l.s
+++ b/pc/l.s
@@ -7,7 +7,7 @@
  * Some machine instructions not handled by 8[al].
  */
 #define OP16		BYTE $0x66
-#define	DELAY		BYTE $0xEB; BYTE $0x00	/* JMP .+2 */
+#define DELAY		BYTE $0xEB; BYTE $0x00	/* JMP .+2 */
 #define CPUID		BYTE $0x0F; BYTE $0xA2	/* CPUID, argument in AX */
 #define WRMSR		BYTE $0x0F; BYTE $0x30	/* WRMSR, argument in AX/DX (lo/hi) */
 #define RDMSR		BYTE $0x0F; BYTE $0x32	/* RDMSR, result in AX/DX (lo/hi) */
@@ -827,3 +827,7 @@ TEXT vectortable(SB), $0
 	CALL _strayintr(SB); BYTE $0xFD
 	CALL _strayintr(SB); BYTE $0xFE
 	CALL _strayintr(SB); BYTE $0xFF
+
+TEXT realmode(SB), $0
+	RET
+