Contrast on ti-83 z80

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Contrast on ti-83 z80
From: AN Pluto <anpluto@USA.NET>
Date: Sun, 20 Dec 1998 19:59:23 -0800
Organization: SBC Internet Services
Reply-To: AN Pluto <anpluto@USA.NET>
Xref: paladin.american.edu bit.listserv.calc-ti:26995

Does any body know any thing about contrast?  I've been working on a
Contrast Edit that updates from the current contrast.  The only problem is
how do I get the current contrast with out screwing up my contrast memory?

ld        a,($8008)    ;I think this was the memory for contrast
add    a,1F
or        $0c0
call     lcd_busy
out    (lcdinstport),a

Well this does work but it screws up my contrast and I need help.  I tried
looking in Guru\lot of all ti web page.  Don't tell me to look in some
place. Trust me I already looked.  I need answer.
Thank you for reading this long thing.

Prev: Equation Writer on TI-89?
Next: ?
Index(es):
- Main
- Thread