SUMI DOOM — Flash Tool

What is this?

DOOM (1993) running natively on an e-ink reader. 120×160 rendered at 480×640 with blue noise dithering, S-curve tone mapping, and local contrast enhancement.

Platform

Xteink X4 (ESP32-C3)

Display

480×800 e-ink, partial refresh

Game

DOOM Shareware (E1M1–E1M9)

Frame Rate

~1.6 FPS (e-ink limited)

Flash Usage

~9MB (firmware + WAD)

Controls

6 buttons + power

Boot Mode

Hold BOOT button, plug in USB-C, release

Connect

Click flash below, select the COM port

Wait

Flash takes ~60s. Device reboots into DOOM.

Flash SUMI DOOM

This will erase your device completely and install DOOM.
Your existing firmware, books, and saves will be removed.

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How to enter boot mode:

Unplug the device from USB
Hold down the BOOT button (small button on the back/side)
While holding BOOT, plug in the USB-C cable
Release BOOT after 1 second
The screen will stay blank — that's correct

SUMI DOOM v1.0.0 — Flash Layout (16MB)

0x000000  ┌──────────────────────┐
          │ Bootloader           │  16 KB
0x008000  ├──────────────────────┤
          │ Partition Table      │  4 KB
0x00E000  ├──────────────────────┤
          │ OTA Config           │  8 KB
0x010000  ├──────────────────────┤
          │ SUMI DOOM Firmware   │  3 MB
0x310000  ├──────────────────────┤
          │ (Reserved)           │  3 MB
0x610000  ├──────────────────────┤
          │ doom1gba.wad         │  5.5 MB
0xB90000  ├──────────────────────┤
          │ SPIFFS               │  4.4 MB
0xFFF000  ├──────────────────────┤
          │ Coredump             │  4 KB
0x1000000 └──────────────────────┘

Controls

UP / DOWN — Move forward / backward
LEFT / RIGHT — Strafe
CONFIRM — Use / Open doors / Menu select
BACK — Fire weapon
POWER tap — Open DOOM menu
POWER hold 3s — Sleep (press power to wake)
POWER hold 5s — Exit to SUMI (if dual-boot installed)