Yes, clearly that would need to be since the memory maps are different, but at least there's a CPLD that could be reprogrammed to do it. Basically I guess you'd want to carve out the video display RAM, sound, etc and use the onboard static RAM instead of the RAM on the system, unless there's an...
Don't know if anyone over here is aware of this...
http://eab.abime.net/showthread.php?t=58918&page=8
TL;DR... a fellow is working on an open source GPLed 68020/030/040/060 accelerator for the Amiga 500 that fits in the 68000 CPU DIP socket. Wonder if it would work on the Plus or SE...
Remember that on aluminum electrolytics, the polarization mark indicates the negative terminal, but on tantalums the mark indicates the positive one. As others have indicated, if this is on the -5V rail, then the + side should be to ground. Nevertheless, you should easily be able to tell which...