Sony PSP development - Newton Voyage
Last updated on November 7, 2014, 8:34 by Sebastian Mihai
I kept this PSP homebrew game as simple as possible on purpose. The theme I chose was "space-something with simple controls and gameplay". After the long development time of Geoincursion (for Nintendo DS), creating Newton Voyage has felt more recreational by comparison.

The gameplay is easy to pick up: press X to launch your ship, and then press UP or DOWN while the ship is within the launch area to aim it. Once it leaves the launch area, it will hopefully float to the goal area to the right. There are two kinds of planets: green ones exert gravity upon the ship and red ones exert "anti-gravity", repelling the ship.


Newton Voyage ROM - download this to play the game in an emulator (I recommend PCSP)
Newton Voyage 1.5 firmware ROM - download this to play the game on physical PSP hardware running firmware 1.5. To install, unzip the two directories (newton and newton%) to \PSP\GAME\ on your PSP
Source code - Newton Voyage source code and assets

Dev kit with ready-to-compile source code - get this if you wish to compile the Newton Voyage ROM yourself. This is a cut down version of devkitPro, which excludes examples, libraries targeting other platforms, and other things I considered unnecessary
Installation instructions (tested in Windows 7):
1. Unzip all to c:\pspdev
2. Add C:\pspdev\bin to your PATH environment variable.
3. Add a new environment variable called DEVKITPSP with value /c/pspdev

Development details

Development was made easier by the fact that the PSP supports OpenGL, which I had used before, back in university. I used the PCSP emulator to test my code. At a point in time, I noticed that the same code behaved wildly different on the emulator and the hardware. After a bit of backtracking, I got it to do the same thing on the two platforms.

To build only the ROM, run:


To build the ROM for firmware version 1.5 to use on real hardware, run:

make kxploit
If you use the materials on this page, or any other page on this web site, you do so at your own risk. They are provided "as is". No warranty is provided or implied. I neither guarantee that the materials will work, nor that they will not be harmful in any way.

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Coverage of my projects

Interviewed in the Retro Gamer magazine

My homebrew cartridges

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Sega Dreamcast development - Overbearing Burgers

Snowdrop OS - my operating system from scratch, in assembly language

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aSMtris - Tetris in assembly language (x86, 16-bit)

Balanced Diet (GBA) limited edition

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Atari 7800 development - Poetiru

Arcade ROM hacking - Knights of the Round translation

PocketStation development - Pocket Worm

Sega Game Gear development - Burgers of Hanoi GG

Pokemon Mini development - Mini Cookie

Magnavox Odyssey2 development - Red Green

Sega Dreamcast VMU development - Raining Squares

Nintendo GameCube development - Mama Bear Puzzle

Nintendo Wii development - Groundhog Puzzle

Sega Saturn development - Saturnade

Atari Jaguar development - Jagmatch

Sega CD development - Blackjack CD

Nintendo 64 development - Don't Be Square

Commodore 64 development - Tube64

Sega 32x development - Eight Queens

WonderSwan (Mono) development - Swan Driving BW

WonderSwan Color development - Swan Driving

Animal Keeper - a JavaScript and HTML5 Canvas game

3DO development - Space Invaders Invaders

Sony PlayStation development - The 11th Power

Sony PSP development - Newton Voyage

Nintendo DS development - Geoincursion

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Capacitor study circuit

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Neo Geo Pocket Color development - NGCollector

Neo Geo development - Neo Thunder

Atari 5200 development - Shooting Gallery

ZX Spectrum development - simple input/graphics example

Vectrex development - Scalar Ownage

Nintendo Virtual Boy development - Real Danger

Gameboy Color development - Burly Bear vs. The Mean Foxes (GBC version)

Sega Master System development - Burgers of Hanoi

Colecovision development - Mowleco

TurboGrafx-16/PC Engine development - Alddee

Atari Lynx development - Catkanoid

Nintendo NES development - Invaders must die!

Atari 2600 development - Snappy (batari basic)

Super Nintendo development - Bucket

Gameboy Advance development - smgbalib library

Airplane Vegas slot machine

Sega Genesis development - Gen Poker

(2004) Project One - first university game programming club project

Gameboy development - Burly Bear vs. The Mean Foxes

(2006) RGB Overdose - university programming contest entry