> Joe Magiera dumped a prototype of Halley's Comet. He also dumped an alt revision of > Ikari Warriors but I don't have a pcb pic of it.
there are definitely some differences in this Halley's Comet
I've only tested with the cheats dipswitches on (hold start 1 on boot for them to function) but in the proto verison you can't seem to die from 'damage 100%' like in all the other versions, also the dip after the data logger one causes the game to hang when you start it.
this makes the invulnerability dipswitch more useful as you can play the game forever with it turned on.