Hi,
I have a ACA500plus and an Amiga 500plus. With the installed ACA500plus, do I need to upgrade the ROMs in my Amiga 500plus?
No, according to the ACA500plus specs it has KS1.2, 1.3 and 3.1 built in to its flashrom, and if you have 2.0 roms in your A500+ then you have all three to play around with.