17 - Setting up Rocknix on an Anbernic RGDS

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I bought this device as a Christmas gift for a friend, but they haven't been able to use it all this time because of the time/complexity of setting it up :c

That is no longer the case though! I stumbled across a how-to on YouTube comparing the two alternative OSs for the Anbernic RGDS (i.e., GammaOS and Rocknix) by the creator RetroGameCorps. GammaOS has been out now for a couple of months and it is the more “premium” option with the availability of Google AOSP/PlayStore; however, as noted in the original video, GammaOS is less performant on the RGDS given the minimal hardware.

With that in-mind, I decided to follow the rest of the guide and the creator's suggestion - Rocknix.

Rocknix is an immutable Linux distribution for handheld gaming devices focused on retro gaming emulation. It offers a really wide range of features that I wouldn't have expected from a hobbyist platform:

  • Local and remote multiplayer support
  • In-game touch controls for supported devices
  • Custom performance and power profiles for optimal balance
  • Integrated music and video playback
  • Bluetooth audio and controller connectivity
  • HDMI and USB output for audio and video
  • Cloud and LAN synchronization via Syncthing and rclone
  • Built-in VPN support with WireGuard, Tailscale, and ZeroTier
  • RetroAchievements and automatic game scraping

With the mention of built-in VPN support, I do wonder if this allows Moonlight for remote handheld gaming? At this time, I do not know and I haven't researched it - but it does sound interesting.

@RetroGameCorps  

Setting up the RGDS to use Rocknix was fairly straightforward. As shown in the video, we first need to download Rocknix Nightly from the Github repo (at the time of this writing there is still no official release for the RGDS):

https://github.com/ROCKNIX/distribution-nightly/releases/ 

Then, we need to download the most recent release under assets:

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In the video, the author says that we need to download the “Specific.img.gz” build. I do not know why this one specifically versus the other options - but I assume there is a community note explaining why somewhere.

From there, we can either use Rufus or Balena Etcher to format our SD card and install Rocknix. After the SD card finishes formatting/installing, we need to make a change to the file: /media/user/ROCKNIX/extlinux/extlinux.conf

Replace the following …
FDT	/device_trees/rk3566-powkiddy-x55.dtb

with this instead …

FDT	/device_trees/rk3568-anbernic-rg-ds.dtb
The boot process is as easy as inserting our SD card and pressing the power button. My RGDS booted directly into Rocknix and I was presented with the main menu. We are far from being done here though. We still need to move our legally obtained roms and bioses onto our beloved device.
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In order to do this, we must first enable the USB file transfer setting. You can also configure samba or SSH, but I prefer the direct transfer. To do this, press “SELECT” > Network Settings > USB GADGET FUNCTION > “FILE_TRANSFER”
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With this enabled, we are now ready to transfer our files. But! We still need to download our bioses and roms.
 
The old myrient.erista.me was where I had obtained copies of my games, however, with them now shutdown - I leave the gathering of roms as homework for the reader.
 
Bioses can be obtained here:
For this example, I will be using the latest release at the time of this post:
And, then with those downloaded we can recombine them with the following command:
cat RetroArch_Lakka_v1.22.2_BIOS_Pack.zip.part* > RetroArch_Lakka_v1.22.2_BIOS_Pack.zip
Then, we can unpack the complete zip and we will have our bios files. These can be copied manually into each platforms bios folder, or you can use this script that I had Claude write for me.
 
In theory, the file structure is like so on the RGDS:
ROCKNIX_Anbernic_RG_DS_d3ae1966c4d4dc3d174312d91880a30e/Roms:

3do          atomiswave  cps3          gbah           megadrive        ndsiware  pcenginecd   screenshots  tg16        wonderswan
3ds          bbcmicro    daphne        gbav           megadriveh       neocd     pcfx         scummvm      tg16cd      wonderswancolor
amiga        bezels      doom          gbc            megadrive-japan  neogeo    pet          scv          themes      x1
amigacd32    bios        dreamcast     gbch           megaduck         nes       pico-8       sega32x      tic-80      x68000
amstradcpc   bk          easyrpg       gbh            moonlight        nesh      pokemini     segacd       uzebox      zmachine
arcade       c128        famicom       genesis        moto             ngp       ports        sfc          vectrex     zx81
arduboy      c16         fbneo         genh           mplayer          ngpc      ps2          sg-1000      vic20       zxspectrum
atari2600    c64         fds           intellivision  msx              odyssey   psp          sgfx         videopac
atari5200    cdi         gameandwatch  ios            msx2             openbor   pspminis     snes         vircon32
atari7800    channelf    gamecube      j2me           music            palm      psvita       snesh        virtualboy
atari800     chip-8      gamegear      mac            n64              pc        psx          snesmsu1     wasm4
atarijaguar  coleco      gamegearh     mame           n64dd            pc88      satellaview  st-v         wii
atarilynx    cps1        gb            mastersystem   naomi            pc98      saturn       sufami       wiiware
atarist      cps2        gba           megacd         nds              pcengine  savestates   supervision  windows
Each of these platform folders should then be given a “bios/” folder, like, “Roms/3do/bios/” - and, the respective files are stored there. For example:
Roms/3do/bios/

goldstar.bin
panafz10.bin
panafz10e-anvil.bin
panafz10e-anvil-norsa.bin
panafz10ja-anvil-kanji.bin
panafz10-norsa.bin
panafz1.bin
panafz1j.bin
panafz1j-kanji.bin
panafz1j-norsa.bin
panafz1-kanji.bin
sanyotry.bin

Which can all be automated with this script and usage:

./copy_bios_to_rocknix.sh /path/to/extracted/bios /path/to/ROCKNIX/roms

If you are like me and using the USB file transfer method mentioned before, you might want to use quotes around the RGDS path:

./copy_bios_to_rocknix.sh /path/to/extracted/bios "/run/user/1000/gvfs/mtp:host=ROCKNIX_Anbernic_RG_DS_d3ae1966c4d4dc3d174312d91880a30e/Roms"
#!/usr/bin/env bash
# =============================================================================
# ROCKNIX BIOS Copy Script
# Generated for RetroBIOS v2026.04.02 → ROCKNIX directory structure
#
# USAGE:
#   1. Set BIOS_SRC to the folder where you extracted the RetroArch/Lakka pack
#   2. Set ROCKNIX_ROMS to the root roms/ folder on your ROCKNIX device
#   3. Run:  bash copy_bios_to_rocknix.sh
#
# The script will:
#   - Create bios/ subdirectories as needed
#   - Copy matching files (skips missing files with a warning)
#   - Unzip .zip BIOS files into the correct bios/ folder
#   - Print a summary at the end
# =============================================================================

BIOS_SRC="${1:-./bios}"          # First argument OR current ./bios folder
ROCKNIX_ROMS="${2:-/run/media/ROCKNIX/roms}"  # Second argument OR default mount

COPIED=0
SKIPPED=0
ERRORS=0

echo "======================================"
echo " ROCKNIX BIOS Installer"
echo "======================================"
echo " Source : $BIOS_SRC"
echo " Target : $ROCKNIX_ROMS"
echo "======================================"

# Helper: copy a file if it exists
copy_file() {
    local src="$BIOS_SRC/$1"
    local dst_dir="$ROCKNIX_ROMS/$2"
    local dst="$dst_dir/$1"
    if [ -f "$src" ]; then
        mkdir -p "$dst_dir"
        cp -v "$src" "$dst" && ((COPIED++)) || ((ERRORS++))
    else
        echo "  [SKIP] Not found: $1"
        ((SKIPPED++))
    fi
}

# Helper: unzip a zip BIOS into a folder (extracts contents flat)
unzip_bios() {
    local src="$BIOS_SRC/$1"
    local dst_dir="$ROCKNIX_ROMS/$2"
    if [ -f "$src" ]; then
        mkdir -p "$dst_dir"
        unzip -o -j "$src" -d "$dst_dir" && ((COPIED++)) || ((ERRORS++))
        echo "  [UNZIP] $1 → $2/"
    else
        echo "  [SKIP] Not found: $1"
        ((SKIPPED++))
    fi
}

echo ""
echo "--- 3DO ---"
unzip_bios "3dobios.zip"            "3do/bios"
copy_file  "panafz1.bin"            "3do/bios"
copy_file  "panafz1j.bin"           "3do/bios"
copy_file  "panafz1j-kanji.bin"     "3do/bios"
copy_file  "panafz1j-norsa.bin"     "3do/bios"
copy_file  "panafz1-kanji.bin"      "3do/bios"
copy_file  "panafz10.bin"           "3do/bios"
copy_file  "panafz10e-anvil.bin"    "3do/bios"
copy_file  "panafz10e-anvil-norsa.bin" "3do/bios"
copy_file  "panafz10ja-anvil-kanji.bin" "3do/bios"
copy_file  "panafz10-norsa.bin"     "3do/bios"
copy_file  "goldstar.bin"           "3do/bios"
copy_file  "sanyotry.bin"           "3do/bios"
copy_file  "panafz1j.bin"           "3do/bios"

echo ""
echo "--- Amiga / amigacd32 ---"
copy_file  "kick12.rom"             "amiga/bios"
copy_file  "kick13.rom"             "amiga/bios"
copy_file  "kick20.rom"             "amiga/bios"
copy_file  "kick205.rom"            "amiga/bios"
copy_file  "kick31.rom"             "amiga/bios"
copy_file  "kick33180.A500"         "amiga/bios"
copy_file  "kick34005.A500"         "amiga/bios"
copy_file  "kick34005.CDTV"         "amiga/bios"
copy_file  "kick37175.A500"         "amiga/bios"
copy_file  "kick37350.A600"         "amiga/bios"
copy_file  "kick39106.A1200"        "amiga/bios"
copy_file  "kick39106.A4000"        "amiga/bios"
copy_file  "kick40060.CD32"         "amiga/bios"
copy_file  "kick40060.CD32.ext"     "amiga/bios"
copy_file  "kick40063.A600"         "amiga/bios"
copy_file  "kick40068.A1200"        "amiga/bios"
copy_file  "kick40068.A4000"        "amiga/bios"
copy_file  "kick31034.A1000"        "amiga/bios"
copy_file  "kick32034.A1000"        "amiga/bios"
copy_file  "kick.rom"               "amiga/bios"
copy_file  "amiga-os-120.rom"       "amiga/bios"
copy_file  "amiga-os-130.rom"       "amiga/bios"
copy_file  "amiga-os-204.rom"       "amiga/bios"
copy_file  "amiga-os-205.rom"       "amiga/bios"
copy_file  "amiga-os-310-a1200.rom" "amiga/bios"
copy_file  "amiga-os-310-a3000.rom" "amiga/bios"
copy_file  "amiga-os-310-a4000.rom" "amiga/bios"
copy_file  "amiga-os-310-cd32.rom"  "amigacd32/bios"
copy_file  "amiga-ext-130-cdtv.rom" "amiga/bios"
copy_file  "amiga-ext-310-cd32.rom" "amigacd32/bios"
copy_file  "cd32.rom"               "amigacd32/bios"
copy_file  "cd32ext.rom"            "amigacd32/bios"
copy_file  "cd32fmv.rom"            "amigacd32/bios"
copy_file  "cdtvext.rom"            "amiga/bios"
copy_file  "cdtv.rom"               "amiga/bios"
copy_file  "aros-rom.bin"           "amiga/bios"
copy_file  "aros-ext.bin"           "amiga/bios"

echo ""
echo "--- Amstrad CPC ---"
copy_file  "cpc464.rom"             "amstradcpc/bios"
copy_file  "cpc6128.rom"            "amstradcpc/bios"
copy_file  "cpc664.rom"             "amstradcpc/bios"
copy_file  "cpc_amsdos.rom"         "amstradcpc/bios"

echo ""
echo "--- Atari 2600 ---"
copy_file  "ATARIOSA.ROM"           "atari2600/bios"
copy_file  "ATARIOSB.ROM"           "atari2600/bios"

echo ""
echo "--- Atari 5200 ---"
copy_file  "5200.rom"               "atari5200/bios"
copy_file  "ATARIBAS.ROM"           "atari5200/bios"
copy_file  "ATARIOSA.ROM"           "atari5200/bios"

echo ""
echo "--- Atari 7800 ---"
copy_file  "7800 BIOS (E).rom"      "atari7800/bios"
copy_file  "7800 BIOS (U).rom"      "atari7800/bios"

echo ""
echo "--- Atari 800 / XL / XE ---"
copy_file  "ATARIBAS.ROM"           "atari800/bios"
copy_file  "ATARIOSA.ROM"           "atari800/bios"
copy_file  "ATARIOSB.ROM"           "atari800/bios"
copy_file  "ATARIXL.ROM"            "atari800/bios"
copy_file  "XEGAME.ROM"             "atari800/bios"

echo ""
echo "--- Atari ST ---"
copy_file  "tos.img"                "atarist/bios"

echo ""
echo "--- BBC Micro ---"
copy_file  "48.rom"                 "bbcmicro/bios"

echo ""
echo "--- Commodore 64 / C128 ---"
copy_file  "JiffyDOS_C64.bin"       "c64/bios"
copy_file  "JiffyDOS_1541-II.bin"   "c64/bios"
copy_file  "JiffyDOS_1571_repl310654.bin" "c64/bios"
copy_file  "JiffyDOS_1581.bin"      "c64/bios"
copy_file  "JiffyDOS_SX-64.bin"     "c64/bios"
copy_file  "JiffyDOS_C128.bin"      "c128/bios"

echo ""
echo "--- Coleco Vision ---"
copy_file  "BIOS.col"               "coleco/bios"
copy_file  "coleco.rom"             "coleco/bios"
copy_file  "colecovision.rom"       "coleco/bios"

echo ""
echo "--- Dreamcast ---"
copy_file  "dc_bios.bin"            "dreamcast/bios"
copy_file  "dc_flash.bin"           "dreamcast/bios"

echo ""
echo "--- FDS (Famicom Disk System) ---"
copy_file  "disksys.rom"            "fds/bios"

echo ""
echo "--- FBNeo / Arcade ---"
copy_file  "neogeo.zip"             "fbneo/bios"
copy_file  "pgm.zip"                "fbneo/bios"

echo ""
echo "--- Game Boy / GBC / GBA ---"
copy_file  "dmg_boot.bin"           "gb/bios"
copy_file  "gb_bios.bin"            "gb/bios"
copy_file  "cgb_boot.bin"           "gbc/bios"
copy_file  "gbc_bios.bin"           "gbc/bios"
copy_file  "agb_boot.bin"           "gba/bios"
copy_file  "gba_bios.bin"           "gba/bios"

echo ""
echo "--- Game Gear ---"
copy_file  "bios.gg"                "gamegear/bios"

echo ""
echo "--- GameCube ---"
copy_file  "gc-ntsc-10.bin"         "gamecube/bios"
copy_file  "gc-ntsc-11.bin"         "gamecube/bios"
copy_file  "gc-ntsc-12.bin"         "gamecube/bios"
copy_file  "gc-pal-10.bin"          "gamecube/bios"
copy_file  "gc-pal-11.bin"          "gamecube/bios"
copy_file  "gc-pal-12.bin"          "gamecube/bios"
copy_file  "gc-dvd-20010608.bin"    "gamecube/bios"
copy_file  "gc-dvd-20010831.bin"    "gamecube/bios"
copy_file  "gc-dvd-20020402.bin"    "gamecube/bios"
copy_file  "gc-dvd-20020823.bin"    "gamecube/bios"

echo ""
echo "--- Intellivision ---"
copy_file  "exec.bin"               "intellivision/bios"
copy_file  "grom.bin"               "intellivision/bios"

echo ""
echo "--- Lynx ---"
copy_file  "lynxboot.img"           "atarilynx/bios"

echo ""
echo "--- Mega CD / Sega CD ---"
copy_file  "bios_CD_E.bin"          "megacd/bios"
copy_file  "bios_CD_J.bin"          "megacd/bios"
copy_file  "bios_CD_U.bin"          "megacd/bios"
copy_file  "eu_mcd1_9210.bin"       "megacd/bios"
copy_file  "eu_mcd2_9303.bin"       "megacd/bios"
copy_file  "eu_mcd2_9306.bin"       "megacd/bios"
copy_file  "jp_mcd1_9111.bin"       "megacd/bios"
copy_file  "jp_mcd1_9112.bin"       "megacd/bios"
copy_file  "jp_mcd2_921222.bin"     "megacd/bios"
copy_file  "us_scd1_9210.bin"       "segacd/bios"
copy_file  "us_scd2_9306.bin"       "segacd/bios"
copy_file  "SegaCDBIOS9303.bin"     "segacd/bios"

echo ""
echo "--- MSX / MSX2 ---"
copy_file  "MSX.ROM"                "msx/bios"
copy_file  "MSX2.ROM"               "msx2/bios"
copy_file  "MSX2EXT.ROM"            "msx2/bios"
copy_file  "MSX2P.ROM"              "msx2/bios"
copy_file  "MSX2PEXT.ROM"           "msx2/bios"
copy_file  "MSXDOS2.ROM"            "msx2/bios"
copy_file  "FMPAC.ROM"              "msx2/bios"
copy_file  "FMPAC16.ROM"            "msx2/bios"

echo ""
echo "--- N64 / N64DD ---"
copy_file  "64DD_IPL.bin"           "n64dd/bios"

echo ""
echo "--- NDS ---"
copy_file  "bios7.bin"              "nds/bios"
copy_file  "bios9.bin"              "nds/bios"
copy_file  "firmware.bin"           "nds/bios"
copy_file  "dsi_bios7.bin"          "ndsiware/bios"
copy_file  "dsi_bios9.bin"          "ndsiware/bios"
copy_file  "dsi_firmware.bin"       "ndsiware/bios"

echo ""
echo "--- Neo Geo CD ---"
copy_file  "neocd.bin"              "neocd/bios"
copy_file  "neocd_f.rom"            "neocd/bios"
copy_file  "neocd_sf.rom"           "neocd/bios"
copy_file  "neocd_st.rom"           "neocd/bios"
copy_file  "neocd_sz.rom"           "neocd/bios"
copy_file  "neocd_t.rom"            "neocd/bios"
copy_file  "neocd_z.rom"            "neocd/bios"

echo ""
echo "--- Neo Geo (AES/MVS) ---"
copy_file  "neogeo.zip"             "neogeo/bios"

echo ""
echo "--- NGP / NGPC ---"
copy_file  "ngp.zip"                "ngp/bios"

echo ""
echo "--- PC Engine / TG16 / PC Engine CD ---"
copy_file  "syscard1.pce"           "pcenginecd/bios"
copy_file  "syscard2.pce"           "pcenginecd/bios"
copy_file  "syscard2u.pce"          "tg16cd/bios"
copy_file  "syscard3.pce"           "pcenginecd/bios"
copy_file  "syscard3u.pce"          "tg16cd/bios"
copy_file  "gecard.pce"             "pcengine/bios"
copy_file  "gexpress.pce"           "pcengine/bios"

echo ""
echo "--- PC-FX ---"
copy_file  "pcfxbios.bin"           "pcfx/bios"
copy_file  "pcfx.rom"               "pcfx/bios"
copy_file  "pcfxv101.bin"           "pcfx/bios"
copy_file  "pcfxga.rom"             "pcfx/bios"

echo ""
echo "--- PS2 ---"
# Copy a selection of common PS2 BIOS files
for f in \
    ps2-0220a-20060905.bin \
    ps2-0220e-20060905.bin \
    ps2-0220j-20060905.bin \
    ps2_scph39001.bin \
    ps2_scph50000_55000.bin \
    ps2_scph70000.bin \
    ps2_scph75000.bin \
    ps2_scph90000_0220.bin; do
    copy_file "$f" "ps2/bios"
done

echo ""
echo "--- PSX ---"
copy_file  "scph1001.bin"           "psx/bios"
copy_file  "scph5501.bin"           "psx/bios"
copy_file  "scph5502.bin"           "psx/bios"
copy_file  "scph5500.bin"           "psx/bios"
copy_file  "scph7001.bin"           "psx/bios"
copy_file  "scph7002.bin"           "psx/bios"
copy_file  "scph7003.bin"           "psx/bios"
copy_file  "scph101.bin"            "psx/bios"
copy_file  "scph102.bin"            "psx/bios"
copy_file  "SCPH-10000.bin"         "psx/bios"
copy_file  "ps1_rom.bin"            "psx/bios"
copy_file  "psxonpsp660.bin"        "psx/bios"

echo ""
echo "--- PSP ---"
copy_file  "ppge_atlas.zim"         "psp/bios"

echo ""
echo "--- Saturn ---"
copy_file  "saturn_bios.bin"        "saturn/bios"
copy_file  "hisaturn.bin"           "saturn/bios"
copy_file  "vsaturn.bin"            "saturn/bios"
copy_file  "satar4mp.bin"           "saturn/bios"

echo ""
echo "--- Sega 32X ---"
copy_file  "32X_G_BIOS.BIN"         "sega32x/bios"
copy_file  "32X_M_BIOS.BIN"         "sega32x/bios"
copy_file  "32X_S_BIOS.BIN"         "sega32x/bios"

echo ""
echo "--- Master System ---"
copy_file  "bios_E.sms"             "mastersystem/bios"
copy_file  "bios_J.sms"             "mastersystem/bios"
copy_file  "bios_U.sms"             "mastersystem/bios"
copy_file  "bios.sms"               "mastersystem/bios"
copy_file  "bios_MD.bin"            "mastersystem/bios"

echo ""
echo "--- SGB (Super Game Boy) ---"
copy_file  "sgb_bios.bin"           "snes/bios"
copy_file  "sgb_boot.bin"           "snes/bios"
copy_file  "sgb2_bios.bin"          "snes/bios"
copy_file  "sgb2_boot.bin"          "snes/bios"
copy_file  "SGB1.sfc"               "snes/bios"
copy_file  "SGB2.sfc"               "snes/bios"

echo ""
echo "--- Satellaview ---"
copy_file  "BS-X.bin"               "satellaview/bios"
copy_file  "BS-X (En).bin"          "satellaview/bios"
copy_file  "BS-X (En) (DRM-Free).bin" "satellaview/bios"

echo ""
echo "--- Videopac / Odyssey ---"
copy_file  "o2rom.bin"              "videopac/bios"
copy_file  "g7400.bin"              "videopac/bios"
copy_file  "jopac.bin"              "videopac/bios"

echo ""
echo "--- Vectrex ---"
# Vectrex BIOS often embedded; no separate file needed

echo ""
echo "--- Virtual Boy ---"
# No external BIOS required for VB

echo ""
echo "--- Wonderswan / Wonderswan Color ---"
# WS BIOS is embedded in cores; skip

echo ""
echo "--- ZX Spectrum ---"
copy_file  "zx48.rom"               "zxspectrum/bios"
copy_file  "zx128.rom"              "zxspectrum/bios"

echo ""
echo "--- ZX81 ---"
# ZX81 BIOS typically built into core

echo ""
echo "--- Generic bios/ folder (fallback) ---"
# These go in the top-level bios/ folder for cores that look there
for f in \
    bios7.bin \
    bios9.bin \
    firmware.bin \
    gba_bios.bin \
    gb_bios.bin \
    gbc_bios.bin \
    dc_bios.bin \
    dc_flash.bin \
    disksys.rom \
    neogeo.zip \
    pgm.zip \
    sega_100.bin \
    sega_101.bin; do
    copy_file "$f" "bios"
done

echo ""
echo "======================================"
echo " Done!"
echo "  Copied : $COPIED"
echo "  Skipped: $SKIPPED (files not in source)"
echo "  Errors : $ERRORS"
echo "======================================"

Hopefully, this script runs for you without any issues and your bios files are now loaded onto the device.

The last step is to move our roms. Since my files already followed the same RetroArch structure that Rocknix uses, this was fairly straightforward. For most platforms you can just copy over the archives and you do not need to unpack them; but, this depends on the platform:

Leave zipped (works fine):

  • MAME / FBNeo / Arcade - these require zips, never unzip them
  • Most cartridge-based systems (SNES, Genesis, GBA, NES, etc.) - RetroArch cores handle zips natively

Must be unzipped:

  • PS1 (PSX) - .bin/.cue, .img, or .chd format; zips won't work
  • PS2 - same, needs .iso or .chd
  • Dreamcast - .chd or .gdi/.cdi with all track files present
  • Saturn - .chd or .cue/.bin
  • CD-based systems generally - anything with multi-file disc images needs to be unzipped or converted to .chd

It is suggested that you convert to the .chd format for CD-based games. That can be done using the chdman command:

chdman createcd -i game.cue -o game.chd

To transfer my game files I used SFTP from my NAS, navigated to the RetroArch folder and then copied them into their respective RGDS folder. The process went similar to …

$> sftp [email protected]
$> cd /home/user/retroarch/downloads/3do
$> lcd /run/user/1000/gvfs/mtp:host=ROCKNIX_Anbernic_RG_DS_d3ae1966c4d4dc3d174312d91880a30e/Roms/3do
$> mget *.zip
...

Rinse and repeat for every platform. And, voila!

Your Rocknix device should now have all of the needed bioses and roms to play your games :)