Nintendo DS Emulation NEWS
Emulators
for Nintendo DS
Name NesterDS
Author Rich
Website http://www.telefragged.com/thefatal/index.php?content=inc_si_ds.htm
Description NES emulator for the DS
Screenshots
![](files/nesterds.JPG)
Download
Here v0.2 6th July
2005
Here v0.1 27/06/2005
Information
This is a DS port of Nester. As you might've guessed. There
are a ton of issues, and
it still bothers me that I'm storing the NES ROM over in ewram.
I need to look into
that gbfs stuff apparently. There is no sound (the APU stuff
is hooked up and runs
fine on the DS, it just needs the DS to actually do something
with the output), but
the games I've tried run ok speed-wise. There is some "scanline"-type
rendering
optimizaton in place because that's all still very slow and
I haven't taken
advantage of any DS-specific hardware features to speed it
up.
For compiling the actual code, I'm using DevKitARM R13, and
there are some issues with
the way the default ds_arm9 linker script shoves things into
memory. For whatever
reason, the default handling of non-static global variables
is pretty wacked, and
if you have more than 16k or so I've found that everything
goes to hell (silent
data collision, I'm guessing) and stuff just stops working,
and some of the standard
C runtime functions stop working. Just general bad things.
So I had to manually change
the linker script to move my .data into ewram and that seemed
to solve everything.
If you want to compile this yourself, be sure to change the
batch files and makefile
to use your own paths. Mine are all hardcoded because I'm
a terrible person. Also,
the code itself is all very messy, and torn apart. It's based
on an old GBA port of
Nester I made, and I ported it to the DS over a single weekend
(so it hasn't had the
tender loving care it deserves).
To use the thing, you can use the crappy primitive ROM insertion
tool included in the
archive to put in the NES ROM of your choice. Currently only
one ROM at a time is
supported. If I ever stop being lazy and load ROM files from
image ROM like I should
be doing, that will be changing.
Currently there aren't any emulators that really do a good
job of running this. Out
of them all IDeaS seems to do the best job. It probably goes
without saying, but I
have tested everything on actual DS hardware (using the wifime
method) and it all
works happily.
So that's that, enjoy.
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