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Apple IIc plus
- Subject: Apple IIc plus
- From: "mressl@gmail.com" <mressl@gmail.com>
- Date: Wed, 20 Aug 2008 12:28:50 -0700 (PDT)
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Hello there,
I'm trying to emulate the Apple IIc plus, but it all fails
horrendously because the Apple IIc plus seems to have major
differences to the other IIc's.
So I hope somebody here has a clue as to how it works. The newer IIc's
have 32k ROM, and they bank switch this ROM in two 16k banks, mapped
to the $C000-FFFF address space (by using the $C028 toggle). It seems
that on the IIc plus, the second bank has also some RAM mapped (at
$CE00-$CFFF). At least this is what I figured out after disassembling
the ROM.
Now my questions:
* Does somebody know if $CE00-$CFFF is the correct memory range?
* Are there any other RAM memory areas in the $C000-$FFFF ROM address
space?
* Is it shared with some of the main or language card memory, or is it
stand-alone memory?
* Is it non-volatile RAM?
And my requests:
* Does somebody have the IIc plus reference manual or technical
informations/schematics?
In exchange you will get personal gratification by helping the public
Apple II Documentation Project, and the open-source AppleIIGo
emulator! :-)
Marc.-