Re: Apple IIc plus

[mdj <mdj.mdj@gmail.com>]

On Aug 21, 5:28 am, "mre...@gmail.com" <mre...@gmail.com> wrote:

> 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?

That RAM is used as a track buffer for reading and writing 3.5" disks.
If memory serves, it's 2KB, and was more than likely SRAM.

> And my requests:
> * Does somebody have the IIc plus reference manual or technical
> informations/schematics?

I'm afraid I don't have any IIc documentation past the UniDisk 3.5"
ROM. However, I suspect if you figure out the real boundaries on that
RAM range it should work fine, assuming you've correctly implemented
the IWM to support 3.5" disks... A lot of trouble to go to IMO ...

> In exchange you will get personal gratification by helping the public
> Apple II Documentation Project, and the open-source AppleIIGo
> emulator! :-)

Hope it's useful!

Matt