I got a atmega644p recently (though for the money I should have gotten a 1284p but whatever I know now) thinking that cores were available, popping over to the sanguino site I am greeted with the excellent news that the core files have been brought up to version 0.18. I like .18, I use it a lot for…

644P core for 1.0

Topic		Replies	Views
How to add support for new boards to Arduino 1.0? 3rd Party Boards	7	6063	May 6, 2021
Atmega644 Generale	24	8019	May 7, 2021
New core for SdFat beta and sanguino (644 1284) Storage	3	2332	May 6, 2021
Atmega644, 1284 Arduino. 3rd Party Boards	14	3670	May 6, 2021
Mighty-1284P core updated for Arduino 1.0.6 3rd Party Boards	83	31469	May 6, 2021