Servo8Bit and ATTiny13(A)
I had a look at the Servo8Bit and had pretty much the same thoughts on this as Edgar Bonet in his comment:
Servo8Bit relies on an 8-bit timer, and the ATtiny13A does have an
8-bit timer. It should not be too hard to port this library to that
micro. Study the source code, then study the datasheet of the tiny13A
(mostly the chapter ...