2 files changed, 11 insertions(+), 1 deletions(-)

M pc/devarch.c
M pc/l.s

@@ 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();

@@ 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
+