I am trying to make a PPPD programmer work, but just can't manage... I have built the SP12 cable, with some modifications that should not have any effect. But the programmer reads 0xFF no matter what. So basicly it does not work :((
I have built half a dozen design, none of them works. The LPT port works, I'm sure of that, i have checked it out with some LEDs... But I have noticed something strange... The Input pins on the LPT are high when it is disconnected... is that normal?
I am using an Intel 2,4Ghz, 512 RAM ( i don't think that makes a difference, but it doesn't hurt now, does it?), Windows XP with giveio.sys installed, ATMEGA8515-16PU, and an LPT extension cable male-to-male, NOT interconnect.
I'm using the SP12's soft, provided on the same web page as the circuit, http://www.xs4all.nl/~sbolt/e-spider_prog.html
And Here is my design: