Challenge: Why does bug happen with C64 KERNAL 901227-02 (was: 251101-01 Kernal ROM chip for SX-64 (UD3))

From: Spiro Trikaliotis (ml-cbmhackers_at_trikaliotis.net)
Date: 2007-01-11 21:11:35

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Hello Ruud,

* On Wed, Jan 10, 2007 at 05:08:16PM +0100 Ruud@baltissen.org wrote:
 
> So my question: what will happen?

Why don't you just try, for example, with VICE? Get kernal.901227-02.bin
from zimmers.net.

The C64 will execute LOAD<ENTER>RUN<ENTER>. After this, the C64 will not
respond to the keyboard anymore.

Now the challenge: Why does this happen? Hint: It has to do with the
changes in the $E57C-$E599 area between KERNALs -02 and -03.

Regards,
   Spiro.

-- 
Spiro R. Trikaliotis                              http://opencbm.sf.net/
http://www.trikaliotis.net/                     http://www.viceteam.org/

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