RE: [stella] 7800

Subject: RE: [stella] 7800
From: Matt Pritchard <MPritchard@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 13 Nov 1998 16:03:05 -0600
> > We should check that ROM out to see if he filled it up with
> > library routines which may be useful by others.
> 
> Since you have the manual, you can check the monitor source
> listing.  It wasn't for the final release though since the
> INIT (reset) routine at $FBD0 lacks the indirect startup
> vector I described.
> 
> But as you say, if the 4K image is used, someone could document
> the entry points of useful routines and specify RAM usage (which
> could be a minor nuissance...).
> 
> > 126 Byte validation code
> 
> FWIW, it's 120 bytes.  You'll also see it as 960-bit, ie. a crypto
> reference.
>  last 128 bytes:
>  120  key
>  1
>  1
>  2    NMI
>  2    Reset
>  2    IRQ
> 
	<slap> <slap>  All better now.. I took the 6 from 960.

> The key was supposed to be all FFs when sent to Atari.  Not sure
> what region the key routine scans though.   ($x000-$FF7F or $x000-$FFFF)
> 
> 
> 
> 
-Matt Pritchard
Graphics Engine and Optimization Specialist
MS Age of Empires & Age of Empires ][




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