The (BM) control code establishes "blind mode" -- an attribute where characters entered from the keyboard do not appear on the screen. Up to 32 characters can be entered with the video device in blind mode. This control code is typically used for entering invisible passwords.
a. LENGTH 32 & LOCAL PASSWORD$ 100 FORMAT (BM) . PRINT (0,100) INPUT (0) PASSWORD$ b. LENGTH 32 & LOCAL PASSWORD$ . PRINT (0) (BM) INPUT (0) PASSWORD$This example shows how to set the blind mode input buffer. The (BM) control code is written and the data is entered into the variable named PASSWORD$. This data will not be visible on the screen as it is entered.