I'm not sure what you mean by "AMU"... I just put back the same part it came with, which I assume is some kind of bypass gizmo. It does seem like an odd thing to do, but after a lot of struggle I came to the conclusion that the PMMU and the ZIP 100 were not compatible (!). But I did keep the PMMU "just in case."
You are quite right, the machine was upgraded for "super drive" use sometime in the late '80s and that's when the other mods were put in.
Dave Quebbeman
Gregg Eshelman writes:
--- Dave Quebbeman <[EMAIL PROTECTED]> wrote: <clip>I used to run a PMMU in mine until I found the
SIMMs. The most interesting part was getting the Mode 32 issue
straight.
You replaced the PMMU with the AMU? Why do that?!
And just for others' info, the Mac II needs the ROM
chip upgrade and replacing the IWM chip with a SWIM
chip in order to use larger SIMMS in Bank A plus it
can then use the 1.44M floppy drives. Essentially it
makes the II into a IIx.
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