RetrOrangePi Zero

07/10/18

Last modified on 07/10/18

Categories: Gaming Projects Tags: Orange Pi Video Games

~/contents

Just a few notes on setting up RetrOrangePi on OP0. Updated as I tweak the system.
11/21 - I foolishly added Atari 5200 roms to this setup and found myself journeying back into the heart of emulation darkness.

Hardware

I chose the Orange Pi Zero because it seemed like the most cost-efficient way to make a NES/SNES emulator to play about a dozen games on a composite television. The OP0 handles NES and SNES emulators well and the composite quality is surprisingly good. N64 emulation quality surprised me as well.

The main problem with this SBC is temperature. RetrOrangePi idles about 10 degrees hotter than a clean Armbian install. Super Mario Kart 64 on bare board + heatsink idles at 80C. EmulationStation idles around 80C in the ABS case + heat sink. Adding a fan helps considerably and I was able to achieve idle temperatures in the low 50’s and running temperatures in the low 60’s. If you are using this SBC with the ABS case or a similarly enclosed case I believe a fan is essential. See the fan notes on how to achieve this.

In hindsight, I wish I’d gotten a Orange Pi PC for this project, and would use that version for any future emulation systems. The OPPC shouldn’t need a fan because it’s a larger board and the H3 doesn’t have the overheating problem, but you can easily find a case with a fan built in. It also has an onboard button that can be programmed for safe shutdown. Additionally, the OP0’s lack of HDMI output makes setup a pain.

Software & Configuration

The ROPi team has made installation easy, but I have had repeated boot failures. Retrostone Pi ended up being more reliable than the RetrOrangePi 4.2 SLIM Orange Pi Zero NTSC Version. Check the SD card or the power supply if you have issues. The ROPi community is somewhat small, however, the RetroPie community is well-established and most of the technical support provided for the Raspberry variant applies here.

Scraping Game Data

The built-in scraper is slow. I used muldjord’s excellent Skyscraper library, which allows fast and easy scraping from the command line. Clone the git and run skyscraper_update.sh to install. This takes awhile. Before scraping, shut down EmulationStation

killall emulationstation

Atari Hell

Atari 2600 and 7800 were straightforward after adding their respective BIOS and installing the Stella emulator from the Retropie setup menu, but 5200 require a few extra files. RetroPie documentation has a section on Setting up Atari 800 and 5200. Libretro lists the needed BIOS and their MD5 checksums. Windows has a built-in command line utility that generates hash checksums and I was able to confirm the BIOS files I downloaded matched those in the Libretro docs.

>certUtil -hashfile ATARIBAS.ROM md5

MD5 hash of file ATARIBAS.ROM:
0b ac 0c 6a 50 10 40 45 d9 02 df 45 03 a4 c3 0b
CertUtil: -hashfile command completed successfully.

I never could get 5200 games to play. After loading a ROM the emulator would display the Atari screen, then crash with error code $22, $7000.

Resources:
- https://retropie.org.uk/forum/topic/11386/kat5200-installer-experimental/15
- https://github.com/zerojay/RetroPie-Extra

Assorted tips:

Additional Configuration Changes

RetroPie-Setup > runcommand configuration >
Launch menu (disable)
Launch menu art (Enable)

sudo nano /opt/retropie/emulators/retroarch/retroarch.cfg

video_font_enable=False
sudo nano /boot/cmdline.txt

quiet console=tty3 sdtv_mode=0 sdtv_aspect=1 sdtv_progressive_scan=1 loglevel=3 logo.nologo vt.global_cursor_default=0 disable_splash=1