Sorry Jack, do you mean what chip core? - it's a ATMega644p and a ATMega644PA have 3 of the later direct from Atmel and 1 of the former from a h/ware supplier which was meant to be pre bootloaded but wasn't as confirmed by AVRdude - not that that matters now I have a h/ware ISP and to be honest it runs better without the bootloader haha!
Thanks for having a look / play really appreciate it. boards.txt is attached
Regards
Steve
boards.txt (1.24 KB)