Re: [stella] programming teaser

Subject: Re: [stella] programming teaser
From: "Kroko" <Nil.Krokodil@xxxxxxx>
Date: Fri, 20 May 2005 18:21:54 -0400
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 
one of 32 RAM banks (each 1K size) into the lower 2K adress space. A write 
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 
one of  256 ROM banks OR one of 32 RAM banks in the lower 2K adress space.


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