If you disable the reset pin, by accident or in order to use it as an I/O pin, you will need to use HVP or debugWire to use ISP programming again.

That little six-pin header with MOSIs and MISOs coming out of it will program every AVR you’ll ever come across. The ISP does have a downside – fuses.

Developers, programmers and hobbyists searching for a standalone AVR Programmer may be interested in a new piece of hardware called the Program-O-Tron created by Ewan Fisher base in the United ...