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Thanks again for your input med. This is really beginning to test my tenacity! Here's what I've found - It's not the power supply - doesn't make any difference. With regards to clocking I set up a small program to output a squarewave on C0 with a 10uS duty cycle, i measured this at 11uS which I thin...

Using the LED program on Port A I found that the clock option that made it spring into life is HS-PLL enabled (which is a little abstract IMO especially as there is 2 XT options) The gLCD is still not working, but at least I can see data on the lines (sticking the EB-004 on Port C worked if you don'...

Interestingly the LED example works fine when I change the clock to RC and switch to RC on the board. Has my crystal gone phut?

hmmmm.... digging down a bit, as advised I tried just looking at 1 output and using the LED example and board (EB-004). Without success, so as suspected I'm guessing I have an issue with the set-up of the PIC.
Any Clues anyone?

Thanks for your quick response.... Here's some details. I'm using an EB0006 programmer XT mode and switch set. An EB058 and EB057 on Port C Set up and working as for 16F877 so jumper on B In project options.. chip set to 18F458 clock speed 19660800 In Chip Config Expert Screen Oscillator=XT Osc. Swi...

2 steps forward and 1 back again. Because I ran out of room on my 16F877 I upgraded to a 18F458. Sadly my previously working display has now gone dark. On an oscilloscope I have nice clock and data signals on the pins on the 16F877, on the 18F458 absolute silence. It's all on port C. Is there any ob...

It was indeed the stack, added -swcs 6 2 to the linker parameters in the compiler options and it all goes. I think I'll need to use an 18 series PIC tho'
Thanks for help

Here's the sourcecode. Thanks for replies so far.

It feels something like that,
I guess the big question is Why does me calling it as a macro cause this sort of error.

Hi all, I'm have a EB058/057 gLCD display, all set up and running using a PIC16F877A all works fine when I call the the commands in the main program. However when I move these calls into a Macro the last print command scrolls and overwrites itself. I'm using Flowcode4 with PIC_gLCD.c version 300410 ...