Three steps, in order — each one unlocks the next.
1Device
2Get ready
3Flash
1Choose your device
🔧 Tools — not the firmware. These flash a diagnostic onto a JC3248: the touch tester checks the digitiser (AXS15231B), the hardware diag reports chip ID, PSRAM, display and clocks over USB serial. Re-flash the real firmware afterwards.
2Choose how to update
Two ways to put this firmware on: Flash it over the USB cable from this page, or download an SD access file and update from the SD card. Pick one — then choose the version.
If nothing appears in the serial-port picker, your board is likely using a CH340 / CH341 USB-serial chip and the driver isn't loaded — so no port exists yet. Install it once, replug, and try again:
The flasher opens its own window — pick your board’s port there, then it installs. Don’t unplug until it finishes.
How to use the GTi
You've flashed a board — here's the path from an empty SD card to a full library, plus every setting worth knowing.
1 · Get your SD card ready
Format a microSD as FAT32 and make an /ADF folder for Amiga disk images (add /DSK for Atari ST / PC .dsk if you use them). Drop a folder per game, or loose images — the GTi reads both.
/ (SD root)
├─ ADF/
│ ├─ Turrican/
│ │ ├─ Turrican.adf ← the disk image
│ │ ├─ Turrican.jpg ← cover art (same name)
│ │ ├─ Turrican.nfo ← Title: / Blurb: (optional)
│ │ └─ Turrican.rtfm ← how-to-play text (optional)
│ └─ Bard's Tale/
│ ├─ BardsTale-1.adf ← multi-disk: -1, -2, -3…
│ ├─ BardsTale-2.adf
│ └─ BardsTale.jpg
├─ DSK/← Atari ST / PC .dsk, .img…
├─ GENERIC/← GEN mode: mount any file format
├─ screensaver/← drop .jpg here for a slideshow
└─ CONFIG.TXT ← all your settings (see §7)
Multi-disk games: name the images Name-1.adf, Name-2.adf… and the GTi collapses them into one entry with a disk stepper.
2 · Cover art & game info
Name the cover to match the game — Turrican.jpg beside Turrican.adf. JPG is best (it decodes fast and downscales on the fly); PNG works but keep it under ~1400 px or it can run the panel out of memory. Two optional sidecars: a .nfo with Title: and Blurb: lines fills the info panel, and a .rtfm text file becomes an in-device manual.
Clean covers:COVERMIN hides tiny low-res art, and REELFILTER keeps the cover reel to good art only while the A-Z list still shows every game. Both are CONFIG.TXT switches.
3 · First boot
Insert the SD and power up. The first boot builds a one-off cover-thumbnail cache — let it finish. Every boot after that is instant, and USB floppy emulation runs underneath the whole time.
Use an A1/A2 card. Random-read speed is everything here — a rated card scans roughly 300 games/sec vs ~9/sec on a cheap one. It's the single biggest difference for a large library.
4 · Day to day — the controls
Two ways to browse: LIST (A-Z with a jump rail) or REEL (spinning cover flow). Tap a game, then INSERT to load it into the drive; EJECT to pull it back out.
LIST / REEL
Switch between the A-Z list and the cover carousel.
SEARCH
The magnifier — type to filter the whole library live.
A-Z rail
Jump to a letter; only letters you actually own show up.
★ Favourite
Star a game. The reel's source cycles ALL → FAV → MOST (most-played).
ROLL
The dice — spin to a random game within the current source.
INFO
Cover, blurb, disk details, and the settings / maintenance actions.
THEME
Cycle the six palettes: Navy, Ember, Matrix, Paper, Synth, Gold.
5 · Add games without opening the case
From the INFO tab: SD ACCESS mounts the card as a USB drive over the data cable, so you copy games and covers straight on — no card removal. FW UPDATE applies a firmware .bin left at the SD root (the SD-access path in this flasher). RESCAN SD rebuilds the library after you've added files.
6 · Go wireless
With a paired dongle you can load disks over the air — from a GTi panel (Scan Dongles → Select), from the dongle's own GotekOMEGA web page, or the GTi phone app.
7 · Settings — CONFIG.TXT
Everything is tunable from a plain CONFIG.TXT at the SD root — pull the card, edit a line, done. New keys self-heal in on a firmware update, so you never lose your settings. The ones worth knowing:
THEME
0–5 · Navy / Ember / Matrix / Paper / Synth / Gold.
FONT
SMALL / LARGE / BIG — text scale, low-vision friendly.
LANG
EN / FR / IT / ES / DE.
ROTATE
0 / 90 / 180 / 270 — screen orientation.
CAROUSEL
OFF / ON / LAST — default boot view (list, reel, or last used).
COMPACT
ON maximises the list; the cover collapses to a strip.
COVERMIN
Hide covers whose short side is under N px (0 = show all).
REELFILTER
ON = reel shows only good covers; the list is untouched.
CATEGORIES
ON = browse by folder buckets (Games / Apps / OS…).
SCREENSAVER
ON / OFF · SSMODE = BOUNCE / SLIDES / MATRIX.
SAVES
Save-game write-back to the SD card.
Most features ship OFF by default — your GTi stays exactly as it is until you turn one on.
Load over WiFi — nothing to flash
If you already have a flashed dongle, you don't need this flasher at all. Load disks like this:
From your phone — the dongle's own web page
The dongle serves its own web page — drag an .adf onto it and it's in the drive. No SD card, no app, no cloud. Two ways to reach it:
On your home WiFi (preferred) — once the dongle has joined your house network, just open gotekomega.local in any browser. Your phone keeps its normal internet the whole time.
Standalone (no router) — the dongle makes its own WiFi network, GotekOMEGA; join it, then open 192.168.4.1.
Home WiFi: open gotekomega.local · Standalone: join GotekOMEGA → 192.168.4.1 → drop a disk
From the GTi mobile app
Scan for dongles on your network, tap one, push a disk. Handy when several dongles share the house WiFi.
Open app → Scan → pick your dongle → load
From a GTi touchscreen
Any flashed panel can pair with a dongle and fling disks to it wirelessly — Scan Dongles → Select → load. That's the whole point of the wireless side.
What is the GTi?
A touchscreen front-end for the Gotek floppy emulator. In 60 seconds:
Where it came from
A Gotek deserves better than three seven-segment digits
The Gotek replaces an Amiga's (or Atari's, PC's, synth's) floppy drive with a USB stick full of disk images — but you pick them by a tiny number readout. The GTi bolts a proper touchscreen on the front: see your games, tap to load.
Where it is now
Cover art, categories, saves, and wireless
A full library browser with cover art, six themes, a spinning carousel, type-to-search, and save-game write-back to the SD card. Multiple screen sizes from 2.8″ to 7″, plus wireless dongles so the disk lives on a tiny board in the Gotek and the screen drives it over the air.
Where it's going
The P4 flagship, bigger panels, and the web
A new ESP32-P4 board (the 4.3″ 480×800 flagship) that self-updates its own WiFi co-processor from the SD card; 7-inch panels; a browser + phone-app path for people who never want to flash anything; and a fleet mode to drive several dongles at once.