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SYSCALLS/SMD - display driver module                1985/04/30


Include files:

     C:          /sys/ins/smdu.ins.c
     Fortran:    /sys/ins/smdu.ins.ftn
     Pascal:     /sys/ins/smdu.ins.pas


Procedures and Functions:

    SMD_$BLT_U (registers, status)
        Starts a bit transfer from one area of display memory to another.

    SMD_$BORROW_DISPLAY_NC_U (unit, status)
        Requests use of the display driver and display memory without
        clearing the screen (black and white only).

    SMD_$BORROW_DISPLAY_U (unit, status)
        Requests use of the display driver and display memory, and clears
        the screen.

    SMD_$CLEAR_KBD_CURSOR_U (status)
        Clears the keyboard cursor from the display.

    SMD_$CLEAR_WINDOW_U (boundaries, status)
        Clears an area on the screen.

    SMD_$COLOR (color)
        Sets the color of lines drawn on the display.

    SMD_$COND_EVENT_WAIT_U (event_type, event_data, reserved, status)
        Checks an SMD eventcount, but does not wait.

    input_flag = SMD_$COND_INPUT_U(char)
        Returns a character if one has been typed.

    SMD_$DRAW_ABS_U (column, line)
        Draws a vector given an absolute position.

    SMD_$DRAW_BOX_U (boundaries, status)
        Draws a box on the screen.

    SMD_$DRAW_REL_U (column, line)
        Draws a vector given a relative position.

    SMD_$EVENT_WAIT_U (event_type, event_data, reserved, status)
        Suspends the calling process until a user types characters at
        the keyboard or until the current scroll or BLT is complete.

    SMD_$GET_EC (smd_key, eventcount_pointer, status)
        Gets the eventcount address of the eventcount which will be
        advanced upon keyboard input or when a BLT is done.

    SMD_$LOAD_FONT_FILE_U (pathname, namelength, font-id, status)
        Loads a font file.

    font_id = SMD_$LOAD_FONT_U (table_ptr, status)
        Loads a font into display memory and returns a font-id.

    SMD_$MAP_DISPLAY_U (display_address, status)
        Maps display memory into the process's address space.

    SMD_$MOVE_ABS_U (column, line)
        Sets the current position for vector drawing.

    SMD_$MOVE_KBD_CURSOR_U (position, status)
        Moves the keyboard cursor to a specified position.

    SMD_$MOVE_REL_U (column, line)
        Sets the current position for vector drawing.

    SMD_$OP_WAIT_U
        Waits for the current scroll or BLT operation to complete.

    SMD_$RETURN_DISPLAY_U (unit, status)
        Returns control of the display to the display manager.

    SMD_$SET_QUIT_CHAR (character, status)
        Defines the quit character.

    SMD_$SET_TP_CURSOR (unit, position, buttons)
        Changes normal cursor to touch pad cursor and moves it to the
        indicated position.

    SMD_$SOFT_SCROLL_U (boundaries, direction, displacement, status)
        Starts horizontal or vertical scrolling on the screen, 2 raster
        lines at a time.

    SMD_$STOP_TP_CURSOR (unit)
        Turns off the touch pad cursor and puts back the blinking
        cursor, if the blinking cursor would otherwise be displayed.

    SMD_$TP_DIRECT (on_off, status)
        Controls whether locator device data directly controls the
        touch pad cursor or is sent to the user program.

    SMD_$TP_DISABLE (status)
        Prevents locator device data from moving the touch pad cursor.

    SMD_$TP_ENABLE (status)
        Allows the touch pad cursor to be displayed and moved around the
        screen.

    SMD_$UNLOAD_FONT_FILE_U (font_id, status)
        Unloads a font file from display memory.

    SMD_$UNLOAD_FONT_U (font_id, status)
        Unloads a font from display memory.

    SMD_$UNMAP_DISPLAY_U (status)
        Unmaps display memory from the process's address space.

    SMD_$VECTOR_INIT_U (display_address)
        Initializes the vector-drawing routines.

    SMD_$WRITE_STRING_U (position, font_id, string, length, waitflag,
                         status)
        Displays a string of text on the screen.