Subject: Re: [stella] programming teaser From: "Fred Quimby" <c9r@xxxxxxxxxxx> Date: Fri, 20 May 2005 19:32:00 -0400 |
Sounds interesting. Do any emulators support 3E yet? >Hi ! > > > What bankswitching scheme are you using? I ask because I'm not aware of > > any > > that allow multiple banks of RAM except for E7 or Starpath, and the >Kroko > > cart doesn't support these. > >I have implemented a new bankswitching scheme into the Krokodile Cart which >makes it possible to use the entire 32K RAM on the Krokodile as additional >RAM. I have called it "3E". > >The 3F Bankswitching Scheme was modified such, that a write to adress 3E >selects >one of 32 RAM banks (each 1K size) into the lower 2K adress space. A write >to >3F switches back to one of the 256 ROM banks (each 2K size). > >RAM can be accessed like it was done in Commavid Cartridges.. > >So in addition to one fixed ROM bank (2-4K) you can choose if you want to >have >one of 256 ROM banks OR one of 32 RAM banks in the lower 2K adress space. > >Armin > > >Archives (includes files) at http://www.biglist.com/lists/stella/archives/ >Unsub & more at http://stella.biglist.com > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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