Status of this fork:

• Successfully flashed one ATTiny84 with another ATTiny84. (SPI) Hardware: (https://github.com/AndersBNielsen/v-usb-businesscard)
• ATTiny85 support might be broken
• TPI tested, working with ATTiny10
• Hardware folder still reflects the ATTiny85 version

SPI ISP uses PA4(SCK), PA6(MOSI), PA5(MISO), PA3 (slave reset) TPI uses PA5(TPIDATA), PA4(SCK), PA3 (slave reset).

Note: This is a fork of https://github.com/cpldcpu/USBasp-t (which again is a fork of Thomas Fischl's USBasp) to support Attiny84 too. I will try to leave support for ATTiny85 intact.

Please see [readme.txt] for original USBasp information and license.