HP adopted 3.5" disks before they evolved into the disk used commonly
today, so newer disks aren't compatible. Of course, HP also used a
proprietary formatting scheme.
-- Doug
Wronnngggg! They are compatible. I've been using regular commercial
3.5" disk in my HP 150, Integral and other HPs for years. You just have to
format them in the HP machine to get the HP format. Almost all the HPs use
different formats so you have to format them in the same type machine and
drive that you're goint to use them in. FWIW all those floppy drives are
made by Sony.
I found a pretty good HP 150 FAQ. It's at
"http://www.mdn.com/oksoftware/Computers/hp150faq.html".
Joe