Ich brogge den ATtiny25 (gleich wie ATtiny45) mit meinem SI-Prog Billig-Adapter, den ich auch für Pony verwende. Da Pony die nicht kann, nehme ich den avrdude als Progger.

Wenn du den Progger nicht findest such mal durch die avrdude.conf, heisst irgendwas mit siprog und port banging, notfalls bringst du avrdude bei, was er zu tun hat...
Code:
# serial ponyprog design (dasa2 in uisp)
# reset=!txd sck=rts mosi=dtr miso=cts

Programmer
  id    = "ponyser";
  desc  = "design ponyprog serial, reset=!txd sck=rts mosi=dtr miso=cts";
  type  = serbb;
  reset = ~3;
  sck   = 7;
  mosi  = 4;
  miso  = 8;
;

# Same as above, different name
# reset=!txd sck=rts mosi=dtr miso=cts

Programmer
  id    = "siprog";
  desc  = "Lancos SI-Prog <http://www.lancos.com/siprogsch.html>";
  type  = serbb;
  reset = ~3;
  sck   = 7;
  mosi  = 4;
  miso  = 8;
;

Programmer
  id    = "siprog3";
  desc  = "serial port banging, design ponyprog siprog";
  type  = serbb;
  reset = 3;
  sck   = 7;
  mosi  = 4;
  miso  = 8; 
;

# unknown (dasa in uisp)
# reset=rts sck=dtr mosi=txd miso=cts

Programmer
  id    = "dasa";
  desc  = "serial port banging, reset=rts sck=dtr mosi=txd miso=cts";
  type  = serbb;
  reset = 7;
  sck   = 4;
  mosi  = 3;
  miso  = 8;
;

# unknown (dasa3 in uisp)
# reset=!dtr sck=rts mosi=txd miso=cts

Programmer
  id    = "dasa3";
  desc  = "serial port banging, reset=!dtr sck=rts mosi=txd miso=cts";
  type  = serbb;
  reset = ~4;
  sck   = 7;
  mosi  = 3;
  miso  = 8;
;
Kommt eben drauf an, wie dein Adapter verdrahtet ist...