Re: [stella] 2600/GBA Programmer Needed!

Subject: Re: [stella] 2600/GBA Programmer Needed!
From: Bill Heineman <burger@xxxxxxxxxxxxxxxxx>
Date: Fri, 02 May 2003 09:37:25 -0700
on 5/1/03 7:11 PM, Andrew Davie at atari2600@xxxxxxxxxxxxx wrote:

> Things aren't always as simple as they seem.  There's a lot of behind the
> scenes stuff going on that never sees the light of day.  *sigh*
> Cheers
> A

Oh god you are correct. The main issue is that the 2600 uses a 1.1Mhz 6507
CPU. The GBA is a 16Mhz ARM7 CPU. This my default means that you have only
16 cycles to emulate each and every 6502 instruction. That leaves almost NO
CPU time left to emulate the audio, video or input routines.

There are techniques to "cheat", but this is NOT a trivial task. Anyone who
thinks this can be done in a simple manner is deluding themselves.

Bill Heineman

P.S. Oh, did I mention that the screen size is WAY off on the GBA? This
means that the games will have to be "scaled". Fun fun fun!!!

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