Specifications

Chapter 13. Backlight Function
167
Setting 0 to port 6020h deactivates the backlight function and turns off the backlight if lit.
When the backlight function is activated with the
OUT statement, the backlight function on/off
key and ON-duration specified by the
KEY statement will be ignored.
Backlight OFF
The backlight function is
deactivated when the
BHT is turned on.
Backlight ON
Backlight OFF
The backlight function
remains activated.
If no key is pressed
for the time length
preset to port 6021h,
the backlight goes off.
Press any key.
With the statement,
set 0 to port 6020h.
With the statement,
set 0 to port 6020h.
With the statement,
set 1 to port 6020h.