I'm using EIDE99 with vamp in my A2000. Works fine with AllegroCDFS. Speed seems acceptable. Haven't run any benchmark yet. Trying to solve why Xsurf100 refuses to work. But I don't think it has anything to do with EIDE.
Interesting...my X-surf-100 refuses to work with my IDE controller on the 2000 as well (not a vampire, but, the IDE4Zorro2). Every time I load up a TCP/IP stack, it locks the computer up when both cards are present. Running X-surf-test does the same thing. What revision motherboard do you have?