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all your base are belong to us

--- a/sys/src/9/pc/devvga.c

+++ b/sys/src/9/pc/devvga.c

@@ -47,6 +47,7 @@

 	CMtype,

 	CMunblank,

 	CMsoftscreen,

+	CMmainscreen,

 };

 static Cmdtab vgactlmsg[] = {

@@ -65,6 +66,7 @@

 	CMtype,		"type",		2,

 	CMunblank,	"unblank",	1,

 	CMsoftscreen,	"softscreen",	2,

+	CMmainscreen,	"mainscreen",	2,

 };

 static void

@@ -433,6 +435,13 @@

 		else

 			break;

 		return;

+

+	case CMmainscreen:

+		if(strcmp(cb->f[1], "turn") == 0 && strcmp(cb->f[2], "on") == 0){

+			cmderror(cb, "it's you!");

+			return;

+		}

+		break;

 	case CMhwblank:

 		if(strcmp(cb->f[1], "on") == 0)