SE/30 Common Fixable problems — #16

Post #16 by MidnightCommando

Source Forum	68kMLA
Category	Networking
Post Date	Thu, 4 Feb 2010 - 18:12
Original URL	https://68kmla.org/bb/threads/se-30-common-fixable-problems.19764/

Post

Geo,
To clarify some things:

- Mode32 is a System Extension file, meaning that it is like a .dll file under Windows. The file is designed to "patch" a Mac that was "crippled" with 24-bit addressing. The architecture is 32-bit, but for some reason, Apple released the model as 24-bit addressing. Without that Mode32, or equivalent, the Mac won't address anything higher than 8 megabytes of RAM. The system was addressing 24-bits and Mode32 patches in that missing 8 bits of code.

Click to expand...

Ok, gotcha. So once I get a SE/30 or Classic II, I should look to see if "Mode32" is on the system? Where would I get it if it doesn't have it?

Yes and no.

Once you get an SE/30, you'll definitely want Mode32. However, a Classic II only supports 10MB of physical memory (the 2MB on the board + 2 4MB SIMMs) so Mode32 is superfluous for that machine.

If you go the Classic II route, I don't advise trying your luck with System 7.5 - use 7.1 or 6.0.8L or you'll just be torturing yourself.