Keep in mind that additional floppy drives eat RAM fast (approx 50k per drive). 150k less ram could brake some games. Option to turn them off would be nice, real amiga users had only one anyway.
...or add more ram.

I see that emulator in fact has A600 or A500plus configuration (1MB Chip memory and no fast/slow memory.)

Stock A500 had 512k chip memory and usualy aditional card with 512k slow memory (pretty much as a standard). (Amiga workbench will report slow memory as fast memory... to avoid confusion.)

Some games and demos require fast or slow ram and will not see 1MB chip memory as an expansion, so it would be nice if we had memory configuration option somewhere. (Example is Crashpoint demo by Addonic... This one will also insult you if you don't have enough RAM. )