Since there is a difference between version 1.6.3 and 1.6.4 in relation to the earlier 1.6.x versions, i decided to make the installation file for 1.6.4 (1.6.3) version only.
Just unpack file in ...\sketchbook\hardware folder.
Boards included :
I added some GCC Flags ( can be used from IDE menu - choose default if you do not like to use extra optimisation flags ) :
And i added millis() , micros(), delayMicroseconds() and set ADC clock for 16 KHz ( it is not set for 16 kHz originally )
If you use 128 KHz - default_bitclock must be slow down to -B50 and for 16 KHz to -B250 ( USBTinyISP)
tiny13_for_1.6.4.zip (46.2 KB)