myke predko wrote:
>
> >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