> (First, we *are* talking about the Noritake CU20045SCPB-T23A, right ?)

Yes, that's the one.

> OK, my tests was done using the serial interface. I only
> write "normal" characters to it and didn't use the BUSY line.

My problem sometimes happens in normal characters, but much more pronounced as
ESC characters

> Since you are running at (aprox) 20 Mhz, you have an Tcyc of 200 ns.

201 and a little bit, I checked this just to make sure...

> The mini setup time of the data lines before the rising edge of WR is
> 100 ns. It *should* be OK, but... There is also a slight delay
> from the rising edge of WR until BUSY goes high. Just 200 ns "max"
> according to the data sheet, so that should not be a problem. You
> cold anyway try to put some NOP's to slow down the "clocking"
> a little, just to be safe.

I put NOPs between the MOVWF PORTB and the BSF WR, I didn't put any after
figuring the RETURN and the following CALL are 2 cycles each, on top of
whatever I do between them in the calling function.

> I hope not :-)
> I'm currently trying to get a similar unit (GU128X32-311) running,
> and it also have a CS line that I was planning to set CS hard "low".

I have let this float, but I can set it hard one way or the other, I will do
this later tonight.

> Is there anything connected to the "Programming" connector ?

Most of the time my Wisp628 is connected, it makes no difference connected or
not, I usually leave it connected but have disconnected to see if it helped.

> that you get problems ? Or just about anythime ?

Just about anytime, but a lot more pronounced when I do the ESC. I have walked 
a HERE GOTO HERE through the code and _not_ seen the problem. Until I started 
looping to give the operator something to look at.

Thanks for your help.
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