>Hi,
>
>> Return home 40us to 1.6ms
>>
>> just a note about return home, i use the set CG ram address
>> to location zero, it only takes 40us.
>
>If the display has scrolled the two commands may behave differently.

Yes.  If you are going to do anything funky with an LCD (ie
scrolling/shifting the display), don't go by the 40usec/1.6msec
specifications - poll the Busy Flag (Bit 7 of the Instruction Port) of the
LCD.

I realize that this takes an extra pin (rather than just holding the R/W pin
at a constant value), and a bit of extra code (actually about the same
amount as a 160 usec dlay) but it will make sure everything works okay
without a *lot* of the messy debug that I went through before breaking down
and just putting it in when I was working with the LCDs.

Good luck,

myke

Today, the commercial sector is advancing computer and communication
technology at a breakneck pace.  In 1992, optical fiber was being installed
within the continental U.S. at rates approaching the speed of sound (if
computed as total miles of fiber divided by the number of seconds in the year).

Aviation Week and Space Technology, October 28, 1996