None

csr_hide() reads the present location of the physical cursor, via csr_rd(), and stores it. If the cursor has already been hidden using csr_hide(), then the previously stored location is retained.

PCDOS Systems:

csr_mv() is called to move the cursor off screen.

OS/2 Systems:

The cursor is made invisible by csr_hide().

UNIX and VMS Systems:

For UNIX and VMS systems, the cursor is turned off (if supported) by csr_hide().

csr_show()

If csr_hide() is called more than once without an intervening call to csr_show(), the originally stored position will be retained.

PCDOS Systems:

If a CGA, EGA, VGA, or PGA Adapter is in use, it is possible to have more than one display page of information stored in the video buffer. Only one of these can be active and shown on the screen. The default page is page 0. This function works on the active page.

UNIX and VMS Systems:

If the terminal does not support turning the cursor on and off, nothing will happen.