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by ForOldHack 660 days ago
SE and SE HD, and if you took the 400 or 800k version of the second floppy from your Mac plus, you could use it as a third floppy. I tried this on an SE and it worked, but never tried it on a SE HD. I thought that some early MacIIs had iwm chips in them, and with A FD HD upgrade you got a SWIM chip and a pair of ROMs to put in.