> Are you monitoring the BUSY line from the VFD ?

Yes, which is the most frustrating part, the datasheet says to do it. I
am using it in parallel mode, here is the function as it appears in my
code

#DEFINE WR PORTC,0
#DEFINE CS PORTC,1
#DEFINE BUSY PORTC,2

        ; Takes the contents of character and displays it.

DISPLAYCHAR        
        ; wait for BUSY to be low...
WAITBUSY
        BTFSC BUSY
        GOTO WAITBUSY
        ; lower WR
        BCF WR
        
        ; Load  data
        MOVFW character
        MOVWF PORTB
        
        ; raise wr
        BSF WR
        RETURN

Notice I _don't_ use CS, but the datasheet is ambiguous about it, could
that be the problem?

The POSCURSOR function calls this three times to output 0x1B, 'H' and
the position. I have also tried this with various amounts of delay in
here, using NOP anything from one to 255*255. This is on an 16F876A
using a 19.8806Mhz crystal. The circuit can be seen at
http://cowshed.8m.com/car/inputs.html  When I was echoing the serial RX
to screen then it worked flawlessly (in Quick write, no positioning) now
I am working on startup, and probably driving the display pretty fast.
The display is using flickerless mode at this time, but it happens
regardless to the mode. I always seem to display 0x9D, the integration
character, when it doesn't work quite right.

-- 
Anthony Toft <toftat@cowshed.8m.com>
     I'm Anton, and I approve this message

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