[url]www.fischl.de/usbasp[/url] (help)

Windows:
Start Windows and connect USBasp to the system. When Windows asks for a
driver, choose "bin/win-driver". On Win2k and WinXP systems, Windows will
warn that the driver is is not 'digitally signed'. Ignore this message and
continue with the installation.
Now you can run avrdude. Examples:
1. Enter terminal mode with an AT90S2313 connected to the programmer:
avrdude -c usbasp -p at90s2313 -t
2. Write main.hex to the flash of an ATmega8:
avrdude -c usbasp -p atmega8 -U flash:w:main.hex

Setting jumpers:
J1 Power target
Supply target with 5V (USB voltage). Be careful with this option, the
circuit isn't protected against short circuit!
J2 Jumper for firmware upgrade (not self-upgradable)
Set this jumper for flashing the ATMega8 of USBasp with another working
programmer.
J3 SCK option
If the target clock is lower than 1,5 MHz, you have to set this jumper.
Then SCK is scaled down from 375 kHz to about 8 kHz.

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