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OrbWorks Community Forum • View topic - Emulator versus hardware
Page 1 of 1

PostPosted: Sat Aug 16, 2003 8:38 am
by Mikael
(for others beginners using PToolBox)

This is partly a comment and partly a question.

With regard to the testing of programs, I've found that the advice given by Joe in the PToolBox docs-where he recommends that all programs are testing thoroughly on both the Emulator and Simulator- is well worth heeding. I've recently found that minor problems which I once regarded as bugs in the Emulator are actually holes in my code, which I didn't notice, as the program always ran without problems on my Sony. I was at the point(stupidly) where I was about to stop using the Emulator, until I decided to go through the code with a fine toothcomb.

The question is: Why is hardware checking so much more forgiving of mistakes etc. than the Emulator? I always thought it was the other way around.

PostPosted: Sat Aug 16, 2003 2:14 pm
by jstadolnik
Debugger roms have a lot more internal "checking" code than non-debug roms allowing them to catch many more kinds of errors. These extra checks increase the size of the roms considerably, to the point where they generally will not fit on the actual physical roms of thier targeted PDA. Also, all the extra checking slows things down, simply because the checking takes additional CPU cycles. For these two reasons (and a few others) debugger roms are not released on PDAs.

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">
The question is: Why is hardware checking so much more forgiving of mistakes etc. than the Emulator? I always thought it was the other way around.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Since hardware roms lack the extra checking they don't bark when you do illegal things. As such, it's very important that developers test on debugger roms, less they end up releasing potentially unstable software.

Joe

The PToolboxLib guy.
http://www.geocities.com/retro_01775/PToolboxLib.htm