'PICLIST Digest - 19 Jan 1999 to 20 Jan 1999'
> In a message dated 1/20/99 4:08:09 PM US Mountain Standard Time,
> midcoast.com.au writes: paulb
> Your reference to "whole top line" suggests to me 1} you have a two-
> line display, 2} you are only initialising it for 1-line display and
> 2} you have the contrast control set wrong. You *DO* have a contrast
> control fitted, don't you?
> Yes there is contrast control, but when I had the display set up for 1 line it
> was very dark required min contrast setting to read. In 2 line mode it looks
When you program the HD44780 chip for 2 line mode it changes the duty
cycle of the LCD. It has less contrast in 2 line mode for the same
On the 16 character displays, controlling the second 8 characters is
different depending on whether you have a HD4100 expander chip or not on
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