win32tty: prevent early messages from flashing by unseen

include/ntconf.h

@@ -151,6 +151,7 @@ extern void FDECL(nttty_preference_update, (const char *));
 extern void NDECL(toggle_mouse_support);
 extern void FDECL(map_subkeyvalue, (char *));
 extern void NDECL(load_keyboard_handler);
+extern void NDECL(raw_clear_screen);
 #endif
 
 #include <fcntl.h>

sys/share/pcmain.c

@@ -105,6 +105,7 @@ char *argv[];
 	register char *dir;
 #if defined(WIN32)
 	char fnamebuf[BUFSZ], encodedfnamebuf[BUFSZ];
+	boolean save_getreturn_status;
 #endif
 #ifdef NOCWD_ASSUMPTIONS
 	char failbuf[BUFSZ];
@@ -172,6 +173,11 @@ char *argv[];
 		chdirx(HACKDIR, 1);
 # endif
 	ami_wininit_data();
+#endif
+#ifdef WIN32CON
+	save_getreturn_status = getreturn_enabled;
+	raw_clear_screen();
+	getreturn_enabled = TRUE;
 #endif
 	initoptions();
 
@@ -243,6 +249,9 @@ char *argv[];
 	    }
 	}
 
+#ifdef WIN32
+	getreturn_enabled = save_getreturn_status;
+#endif
 	/*
 	 * It seems you really want to play.
 	 */

sys/winnt/nttty.c

@@ -498,7 +498,7 @@ cl_end()
 
 
 void
-clear_screen()
+raw_clear_screen()
 {
 	if (GetConsoleScreenBufferInfo(hConOut,&csbi)) {
 	    DWORD ccnt;
@@ -514,6 +514,12 @@ clear_screen()
 			csbi.dwSize.X * csbi.dwSize.Y,
 			newcoord, &ccnt);
 	}
+}
+
+void
+clear_screen()
+{
+	raw_clear_screen();
 	home();
 }