12f675_fuse_about_to_blow!

[LEDave]

Cheers mackrackit, I was pretty close then-ish.

I think I've got the whole sequence now:

INTCON REG bit 3 set to 1 enables the INTCON REG flag bit 0. Bit 0 changes 'flags' when a button is pressed which is controlled by ( IOC = %00011000 - the buttons in effect)

It was this line from the program that threw me:

INTCON.0 = 0    ' No buttons down, so clear int on change flag

I originally thought that if no buttons were down then INTCON.0 = 0 so there was no flag to clear but on reading Bruce's:

' No buttons down, so clear int on change flag

made me think it must be set to '1'.

Thanks for the explanation.

Dave