Skip to content

ZX81

ZX81 icon ZX81 logo

Overview

Introduced in 1981 by Sinclair, the ZX81 was a computer system.

Technical specifications

  • CPU: Zilog Z80 running at 3.25 MHz with minimal supporting logic to keep costs down.
  • Memory: 1 KB of RAM on-board, expandable via external RAM packs to 16 KB or more.
  • Display: Monochrome 64×48 character display overlaid on a 256×192 video matrix with software-timed raster refresh.
  • Sound: Single-bit beeper toggled by the processor for simple tones or tape motor control.

Supported ROM extensions

tzx, p, zip, 7z

Emulators

  • 81 (libretro) – Requires BR2_PACKAGE_LIBRETRO_81

Notes

To enable your gamepad support, go in retroarch menu with "Hotkey+B", then switch this option: "Settings/Input/Input User 1 Binds/User 1 Device type: Retropad" with "Cursor Joystick"

Source data: REG Linux emulationstation/es-system/es_systems.yml