Attiny 1634 not found in tools menu Arduino IDE

I have developed a design using arduino uno r3 and I would like to use attiny 1634 instead of atmega 328p. Learnt how to program attiny 85 using arduino isp. Need help for programming the attiny 1634, couldnot find the attiny 1634 board in the tools menu of the arduino IDE. Did some research online and found out that i need to write a header file for attiny 1634. Please help with this header file.

Thanks in Advance.

You need to install a custom core to get support for the tiny1634, and I think AVRdude.conf also needs to be changed.

Rambo's core should work GitHub - rambo/arduino-tiny at attiny1634 (for 1.0.6 of IDE - will have to follow porting guidelines to make it work on 1.6.x).

My tiny841 core also should work with 1634 (also not drop-in ready for 1.6.x, but closer see readme ) GitHub - SpenceKonde/arduino-tiny-841: Arduino core for ATtny841, 828, 1634 and 441 - however testing of the 1634 part of it has been very limited - it's entirely possible I didn't pull everything it needed over.

The tiny1634 is a really nice chip - lot of capability in a small, cheap package. And the hardware serial has made it practical to put optiboot on the 1634 and 841.