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rRootage for GP2X v1.0
February 18 2010

Ported by Senor Quack (dan silsby)
(dansilsby gmail (dot) com)

Important credit goes to:
* rixed - gpu940, a brillaint fixed-point ASM-optimized
3D graphics library with OpenGL glue that transfers
all rendering to the second CPU core
* GameGod - Initial work on GP2X port

GP2X Control Mapping:

Y, B, R_Trigger: Laser
X, A, L_Trigger: Special
Start: Pause
Select: Exit to menu (new feature I added)
Vol+/-: Change volume
DPAD: Move

Notes:

* For me, it is 100% stable and reasonably fullspeed
at 220mhz. It is recommended you overclock rRootage
to 220mhz, if possible, using GMenu2X settings for
your rRootage link. It is also *highly* advisable
to turn on the Fast RAM Timings option. I can
frequently get 20-60fps throughout levels
and even the higher levels remain playable, too.

Running without music or sound should have no effect
on your FPS, by the way. The bottleneck is all the
3D rendering occuring on the second core.

If you aren't already using GMenu2X on your GP2X,
you should be. rRootage does not touch your RAM
timings or overclock your CPU, because GMenu2X can
do this already and is the overall best, most flexible
solution for everybody. Or, just install the Open2X
firmware that already comes with it included.

Many will find that rRootage cannot overclock as high
as other programs can because of the higher current
draw imposed by the use of the second core. My unit,
even running Picodrive which runs sound on the second
core, was always able to overclock to 250mhz running
off batteries. However, running rRootage which does
all 3D rendering on the second core, I can only
go to 220mhz reliably. Plugging the unit into a wall
adapter allows for somewhat higher overlcocks.

If you are interested, the full-featured replacement
firmware, Open2X DR7, I helped develop has the awesome
GMenu2X shell built into the NAND, preinstalled
and with new added features for your GP2X:
http://www.gp32x.com/board/index.php?/topic/47311-open2x-dr7-for-f100-and-f200/

* I have added a command line option to those already
present: -laser

If you use it, the laser will always fire *unless*
you are pressing down the assigned laser button.
Someone requested it for noiz2sa and I thought it
was a good idea for this, too. If you want to
apply this feature, delete the rRootage.gpe launch
script that is already present and rename
the file _rRootage.gpe-laser to be rRootage.gpe
instead.

* rRootage will hang if loaded a second time, upon having
quit and restarted the program. I was not able to
resolve this. So, run rRootage only once and then
restart your GP2X if you quit and play something
else and want to go back. Sorry ;)

It should be noted that if you are running the Open2X
firmware you can use the software reset feature I
added to quickly reset back to GMenu2X if this occurs
and simply run rRootage a third time and it will work.
(Press L+R+VOLUP+VOLDOWN+A+B+X+Y to quickly get back
to the GMenu2X shell if any program hangs on you)

* For both speed and stability reasons, almost all line
rendering and texture effects have been disabled. So,
for example, the scrolling background is gone, the
alpha-blended starbursts present in the PC version are
missing, bullet outlines, etc. The GP2X is rendering
everthing on a very limited integer-only ARM CPU that
can barely keep up with everything being thrown at it
already. I have also sped up things by significantly
reducing the number of polygons in the laser beam, and
changing the appearance of it in the process. I find
it is a nice compromise and helps free up several
FPS.

The gpu940 3D library's line rendering also contains a
bug whose presence is fortunately gone for
good in my port thanks to many lost evenings filled
full of bug hunting and experimentation. Further work
might be done to allow optional display of some of the
missing effects. The small number of lines drawn in
my port compared to the PC version allows this bug to
remain hidden for now.

Name:	rRootage_v1.0.zip
Date:	18/ 2/2010
Size:	3.54 MB
Version:	1.0
Author:	Senor Quack (Dan Silsby)
Website:
Downloads:	623
Full English Review:

Operating Systems:

gp2x F100
gp2x F200

Connection	Download Time
56k Modem	10 mins, 74 secs
128k ISDN	4 mins, 54 secs
256k Cable/DSL	2 mins, 19 secs
512k Cable/DSL	1 mins, 14 secs
1mbit Link	33.8 secs

Download

Please note: The comment section is NOT intended to ask for help. Please use the I need Help-Section at the boards.

11 Comments

senquack:

The screenshot is just a representation of what the game is like on the PC. Some graphical effects are not present on the GP2X, but I cannot take a screenshot from the GP2X because of the way the 3D library works.

Nixot:

Wiz version please

farox:

Great Work ..SenorQuack.

Eclipse:

could someone try to port it to the wiz? :D

BlueProtoman:

I demand that this be ported to Wiz.

Eclipse:

yes pleeeaaaseeeeeee

senquack:

In time my friends.. I am working on a Wiz port as we speak :)

BlueProtoman:

Wiz port? You. Are. GOD. Will it run faster than the GP2X version, and will it retain more of the graphical effects?

senquack:

The Wiz port has all of the graphical effects (minus some outline lines that look bad at a low resolution) and the version I have not released yet runs fast, minimum 20fps in almost all levels, often 40-60fps. Also, it is completely configurable controls-wise and can optionally be played rotated so it takes up the full screen.

BlueProtoman:

Three questions: 1. When can we expect a release? 2. What file is the save data? I want to use the save data from my copy of the PC version. 3. Are you planning on porting any other Kenta Cho games to GP2X or Wiz?

senquack:

No plans as of right now to port any of his other games (I think most of them are in the D language which I've never used before)

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