TPI Fails about usbasp HOT 3 OPEN

What processor is on USBasp device?
Many of the USBasp devices have atmega48 processors. The atmega48 only has 4k of flash and so on that part the TPI code is removed. But averdude should report an error if TPI mode is attempted.

from usbasp.

Both are ATMega8A

The output indicates that TPI is working but it's not actually writing anything - it reads stuff out fine it seems (signature and verification of existing contents).

I also tried forcing the bitclock slower (notice the writing time for the fischl is 3x the (non-)writing time for 1.06a), makes no difference.

from usbasp.

I should have RTF Datasheet!

The ATTiny 4/5/9/10 require 5v to program them.

I had the USBasp with the 1.06a firmware set to 3v3 output, so it was able to read but not enough juice to actually flip any bits.

Maybe a note in the README.md, I see somebody else was having similar problems in the Arduino forums a year or so back, I bet it was the same.

from usbasp.