Juniper Systems Allegro DOS Manual User Manual
Page 249
Software Developer's Guide for DOS Page 8-15
Subfunction:
AL = 01h (read video contrast)
Output: AL = Video Contrast
The range of video contrast is from 0 to 63.
Subfunction: AL = 0Ch/AL = 0Dh (turn backlight off/on)
AL = 0Ch turns the display backlight off. AL = 0Dh turns the display
backlight on. Returns nothing.
Subfunction:
AL = 0Eh/AL = 0Fh (set heater off/auto)
AL = 0Eh turns the display heater off. AL = 0Fh sets the display heater
to automatic. Returns nothing.
❖ Note: In automatic mode, the heater is active when the display temperature is
below -3° C.
Subfunction:
AL = 10h/AL = 11h (set key beep off/on)
AL = 10h turns the key beep off. AL = 11h turns the key beep on.
Returns nothing.
Subfunction:
AL = 12h (power down system)
This function causes the Allegro to immediately power off just like it
does when the
mode. If external power is connected to the Allegro, this function causes
the Allegro to go into a semi-low power state where it appears to be off,
but it is actually on. Any event that normally causes the Allegro to turn
on (pressing the On/Off key, com port ring in, etc.) causes the Allegro to
reboot. When the external power is removed, the Allegro powers off.
Subfunction:
AL = 13h (put system in reboot mode)
When it is executed, the Allegro is set to reboot mode. In this mode the
on/off key will cause power to be turned off. Returns nothing.
Subfunction:
AL = 14h (put system in suspend/resume mode)
When it is executed, the Allegro is set to suspend/resume mode. In this
mode, the power is not completely shut off. The Allegro is still running
but at very low power, so it appears to be off. When the key is pressed,
the Allegro will resume where it left off.