Civic ECU versions

[apolune]

Before today, I didn't know an ECU from emu. This morning, mine died (my ecu; I don't have an emu).
I know this much:
I have a 92 Honda Civic Dx 1.5L manual transmission.
The dead ECU is a #37820-P06-A00.
I nearly choked when I found out how much a new one from a dealer costs.
I'm seeing very similar used or remanufactured ones on eBay (A01 and A02) for a lot less.

I've read that the last digit is a revision or version number. But what does that mean? Can I drop in an A01, A02, etc. without modification? If not, how much modification is required?

Thanks!
a newbie

[RMS]

in general the revision refers to the year as well. for the po6 my experience (which is pretty big) is that any 5-speed version will do and pass smog testing.

what is wrong with yours? it may be easily repaired.