Hi, Roman > I was about to send an e-mail saying it doesn't work on my system, but then > I tried Compatibility mode: Win95, 256-color, 640x480. Now it works on my > XP system. No lucky with windows XP in portuguese even using compability mode :-( I just get a screen that seems to be at 640x480 full of wierd squares and yellow stripes :-( What are you using to develop it ? If it is Turbo Pascal there is an option for not making direct writes to screen memory. It I remember correctly you have to put the line " directvideo = false ; ". If you have time please take a look at it. I was about to put the diagram for that nice 15 to 100v supply with 5 v output on the list. I will wait and see if I can put it in ascii :-) By the way. The power supply works beautifully and i get no "hot components" even when running at 97 volts ! I will get the diagram with final values afterwards. Best regards, Alexandre Guimaraes -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu