So I was given an old iMac a couple of days ago (tray-loading iMac G3 running OS 9.2). I played around with OS9 for a while, but quickly got frustrated at the lack of a command line, so I decided to install NetBSD on it. The install process seems fairly straightforward, the only problem being that I can't get into Open Firmware. What I've done is hit CMD+OPTION+O+F during the bootup chime - nothing. I've tried many different variations on this, trying at many points during the bootup process. According to what I've read online, all of the iMacs have Open Firmware 3+ - is this right? I've Googled to no avail. Does anyone have any ideas? Many thanks in advance.