Intermec Janus 2010 Reference Manual page 153

The scroll parameter requires IM_SIZE_MODE_80X25 and is one of the
following constants:
IM_LCD_SCROLL_AT_25
IM_LCD_SCROLL_AT_16
IM_LCD_SCROLL_AT_13
IM_LCD_SCROLL_AT_8
The char_ht parameter requires IM_SIZE_MODE_80X25 and is one of the
following constants:
IM_STANDARD_CHAR_HEIGHT Standard height characters, applies to
IM_DOUBLE_CHAR_HEIGHT
None.
OUT Parameter:
This function returns one of the standard status codes listed in Appendix A,
Return Value:
"Status Codes."
Using this function to set display modes clears the screen.
Notes:
The IRL input commands will not display correctly if the display is in 80X25
mode and the cursor has scrolled off the display. To alleviate this problem,
set the display mode to one of the other modes, such as 20X16.
The mode does not change if there are conflicting parameters, such as trying
to set the video_mode to 16 lines and the scroll_mode to line 8.
You must install the Reader Wedge to use this function. For information on
loading RWTSR.EXE, see "Runtime Requirements" in Chapter 2, "Working
With Ada."
im_get_display_mode, im_set_follow_cursor
See Also:
im_set_display_mode
Scroll at line 25
Scroll at line 16 (2010 and 2020)
Scroll at line 13 (2050 and double height)
Scroll at line 8 (2010 and 2020)
all scroll modes except line 8 and line 13
Double height characters, applies
only to scroll at line 8 and line 13
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