Evertop: E-ink IBM XT clone with 100+ hours of battery life

Original Article ↗ Hacker News Discussion ↗

An open-source “Evertop” laptop that emulates an IBM XT on an ESP32 microcontroller, paired with an e‑ink screen and solar charging, is reviving interest in ultra‑low‑power, always‑ready computing. Commenters praise its 100–200+ hours of runtime and vast DOS-era software library, but note significant input latency and lack of modern connectivity as trade‑offs. The project fuels a broader conversation about “forever devices” — simple, distraction‑free machines with weeks-long battery life — and whether e‑ink, transflective LCDs, or ARM/RISC‑V Linux systems are the best path to get there.

Overall concept & target use cases

  • Many commenters love the idea of a self-contained, low-power, “forever” computer: writing, coding, retro gaming, exploration, and tinkering without worrying about outlets.
  • Strong appeal for off-grid / prepper scenarios: solar panel + massive runtime + huge library of DOS-era software as a self-sufficient computing environment when modern infrastructure fails.
  • Others see it as a distraction-free “digital typewriter,” terminal/SSH client, or field note-taking machine.

Battery life, power, and networking

  • Creator states 200+ hours of continuous use without power saving, 500–1000 hours with it; solar can recharge or directly power the device.
  • Discussion around WiFi power: staying associated and waking periodically is more efficient than reconnecting every 200 ms; IEEE 802.11 power-save features are linked.
  • Some wish for LoRa, LTE, or mesh-style radios for off-grid comms.

Display: e‑ink benefits, latency, and durability

  • Typing latency is ~0.3–0.4s per keypress; several people say that’s too slow for comfortable daily use, others accept it as the tradeoff for extreme battery life.
  • Creator notes ~350 ms refresh, partial updates, and multi-year light daily use without noticeable degradation.
  • Others cite vendor guidance and 1M-refresh specs, arguing heavy interactive use could shorten lifespan; some say e‑ink is fine for e-readers but dubious for intensive text editing.
  • Multiple suggestions to use transflective / RLCD / Sharp Memory LCD instead for higher refresh and comparable daylight readability.

Architecture, x86 rationale, and “XT clone” debate

  • Runs DOS on an 80186-class emulator atop an ESP32. Built to be compatible with XT software but with more RAM, VGA-class video, and sound.
  • Debate over the term “XT clone”: some say it’s accurate in the 1980s marketing sense (runs XT software, adds features); others think calling an ESP32 emulator a “clone” is misleading.
  • Some want 286/386/486-level devices to run heavier OSes (Windows 95, full Linux); others argue emulating a simple PC on ESP32 is exactly what maximizes battery life.

Desire for adjacent devices & alternatives

  • Lots of nostalgia and wishlists: HP 95/200LX, TRS‑80 Model 100, Tandy 102, PowerBook 100, Palm, netbooks, Alphasmart, Freewrite, “writer-decks.”
  • People point to existing or related products: Pocket386, DevTerm, ZeroWriter, PineNote, various e‑ink Android tablets (Daylight, MobiScribe Wave), Kindle hacks, Raspberry Pi + e‑ink builds.
  • Broader lament that mainstream laptops optimized for power and thinness, not 50‑hour runtimes and ultra-simple computing.