OSDev.org

how can i make the textmode (80*25) cursor blinking ?

iirc, this is defined by some bit in the VGA registers (you should find more detailed info on http://www.osdev.org/osfaq2/index.php/VgaResources, more precisely on FreeVGA, as soon as "osdever.net" is back online ...).

However, i expect some odd hardware (ancient laptops, etc) to ignore that bit, so check if DOS cursor blinks before you slam your forehead somewhere.

While osdever isn't online you can search for the pages you want on Google and read them on its cache.
I.e. for page http://www.google.com/search?q=http%3A%2F%2Fwww.osdever.net%2FFreeVGA%2Fvga%2Ftextcur.htm
go to http://66.102.9.104/search?q=cache:www.osdever.net/FreeVGA/vga/textcur.htm

why is it that osdever.ner seems to be offline more then it's online?

srg