Older Macs like PowerBook G4 have Firewire 400 and 800 ports (I had to go upstairs to confirm that to be true).
BTW my newer PowerMac 8600/200 (now updated to XLR8 G4 450) has a FirewireDirect PCI combo-card (3 external and 1 internal FW ports, 2 external USB ports, TI chip, internal bus power adapter, $110 from Cyberian Outpost at 2001).
...with that PowerMac 8600 I edited hours of old VHS footage converted to DV (and new D8 footage) with Sony TRV320E with a 20 GB IBM Deskstar (that "Deathstar" is still running OK as a backup to backups) and iMovie 1.0.2-6.0.3. Older iMovie versions allowed one to lossy trim DV projects so that humongous 20 GB did do it. ...old iMovie versions had many features, issues ...and bugs ... just ask me ... 20 years ago somebody in these forums replied "you complain a lot" when I reported iMovie issues and workarounds -- just ask me if you are still interested to read those "iMovie_4_bugs.html" - "iMovie_HD_5_bugs.html" - "iMovie_HD_6_bugs.html" files).
