Well yeah - the term screamo wasn't used then. It only came along a few years later.I've never heard Rorschach called screamo before, always seen them as a wider part of power violence. Don't know the other two but bands like Funeral Diner and Circle Takes The Square would be perfect examples of screamo to me.
Heroin were from San Diego in the early/mid 90's on Gravity records who had other similar bands like Mohinder, Angelhair etc
ABC Diablo were German and put out 2 albums in 93 and 95.
whether or not these bands qualify as screamo I can't say but their influence is in the mix somewhere. The bands I mentioned are OK but I am just not a fan of the genre and never was.
the two bands Moose mentioned were unknown to me. Gave them a quick listen and they are a generation on from the stuff I mentioned music wise.
funny to think that word emo was so associated with skinny pants in the last 15 years.
in the 90's emo bands were ridiculed for their baggy pants