--- lbbs/src/editor.c	2025/06/27 12:54:31	1.33
+++ lbbs/src/editor.c	2025/07/01 08:31:11	1.37
@@ -274,7 +274,7 @@ int editor_data_insert(EDITOR_DATA *p_ed
 	}
 
 	// Split current data line if over-length
-	if (len_data_line + str_len + 1 > MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
+	if (len_data_line + str_len + 2 > MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
 	{
 		if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
 		{
@@ -294,7 +294,7 @@ int editor_data_insert(EDITOR_DATA *p_ed
 			return -2;
 		}
 
-		if (offset_data_line + str_len + 1 >= MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
+		if (offset_data_line + str_len + 2 >= MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
 		{
 			if (str[0] == CR)
 			{
@@ -675,8 +675,7 @@ int editor_display(EDITOR_DATA *p_editor
 		return ch;
 	}
 
-	loop = 1;
-	while (!SYS_server_exit && loop)
+	for (loop = 1; !SYS_server_exit && loop;)
 	{
 		if (line_current >= p_editor_data->display_line_total || output_current_row > output_end_row)
 		{
@@ -772,7 +771,8 @@ int editor_display(EDITOR_DATA *p_editor
 							clrtoeol();
 							for (i = 0; i < scroll_rows; i++)
 							{
-								prints("\033[S"); // Scroll up 1 line
+								// prints("\033[S"); // Scroll up 1 line
+								prints("\n"); // Legacy Cterm only works with this line
 							}
 
 							output_current_row -= scroll_rows;
@@ -812,8 +812,7 @@ int editor_display(EDITOR_DATA *p_editor
 					{
 						if (line_current - output_current_row + row_pos <= 0 && col_pos <= 1) // Forbidden
 						{
-							ch = igetch_t(MAX_DELAY_TIME);
-							continue;
+							break; // force output prior operation result if any
 						}
 
 						col_pos--;
@@ -1028,7 +1027,8 @@ int editor_display(EDITOR_DATA *p_editor
 					col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_lengths[line_current - output_current_row + row_pos]));
 					moveto(SCREEN_ROWS, 0);
 					clrtoeol();
-					prints("\033[S"); // Scroll up 1 line
+					// prints("\033[S"); // Scroll up 1 line
+					prints("\n"); // Legacy Cterm only works with this line
 					break;
 				case KEY_PGUP:
 					if (line_current - output_current_row < 0) // Reach begin