sample kernel question

[ultima]

So I typed up Andrew Davies sample kernel and after insulting my anti-virus and some typo errors of my own I got it to compile. 

 

Well it runs as shown in the document using z26 no problem, in Stella I got this as the result:

 

 did I need to set some defaults for it to display correctly?

[+SpiceWare]

If you entered this, then add CLEAN_START

 

Reset
    CLEAN_START

StartOfFrame

 

When the 2600 is powered on RAM and TIA will be in a random state. CLEAN_START is a macro that will zero out RAM and TIA. You can view the code for CLEAN_START in macro.h.  The lines you're seeing are random bit patterns in the players, missiles, ball, and/or playfield.

 

I think back in 2003 Stella would init everything to zero, but now it'll randomize RAM and TIA if Developer Settings is turned on:

 

 

 

And since you are developing leave that turned on as it'll expose bugs that'll occur on some, but not all, 2600s.

[ultima]

Thanks that did the trick.