emulator: EightyOne (Recalbox)
type: libretro
core_classification: community_fork
source: "https://gitlab.com/recalbox/packages/recalbox-cores/libretro-eightyone"
upstream: "https://github.com/charlierobson/EightyOne"
profiled_date: "2026-10-17"
source_commit: "39ea0cc26453f4026458cfff62f10223a6bb1724"
core_version: "v1.2"
display_name: "Sinclair - ZX81 / ZX Spectrum (EightyOne, Recalbox)"
cores: ["eightyone"]
systems:
  - sinclair-zx81
  - sinclair-zx80
  - sinclair-zx-spectrum
  - jupiter-ace
  - timex-ts1500
  - timex-tc2048
  - timex-ts2068
  - lambda-8300
  - ringo-r470
  - microdigital-tk85

exclusion_note: >
  The system directory holds eightyone/ROMs, FDCs and IDEs, but every ROM the
  core requests is served from its embedded table before any path is opened
  (libretro/eo_roms.cpp:106-128). The one file it touches there is
  zxpand-eeprom.bin, written when absent (81/Source/zxpand/smbsd.cpp:75-98).
notes: |
  Recalbox port of EightyOne, vendored under 81/ and built with CMake.
  Machines: ZX80, ZX81, ZX97LE, TS1000, TS1500, TK85, Lambda 8300,
  Ringo R470, Spectrum 16K/48K/+/128K/+2/+2A/+3, TC2048, TC2068, TS2068,
  Jupiter ACE.
  ref: libretro/libretro_core.cpp:876-1074

  The ROM directory is <system>/eightyone/ with ROMs/, FDCs/ and IDEs/
  subfolders.
  ref: libretro/libretro_core.cpp:2620-2631

  86 machine, interface, IDE, graphics and speech ROMs are compiled in as
  zlib-compressed arrays and looked up by basename.
  ref: libretro/eo_roms.cpp:16-103, libretro/eo_roms.cpp:106-128

  memory_load, memoryLoadToAddress and font_load query the embedded table
  before opening any path, and every ROM name the core requests is in that
  table, so no ROM is read from the system directory.
  ref: 81/Source/zx81/snap.cpp:1189-1199, 81/Source/zx81/snap.cpp:1285-1299, 81/Source/zx81/snap.cpp:1317-1328, 81/Source/zx81config.cpp:161-210, 81/Source/zx81config.cpp:259-284

  Didaktik D40/D80 tests for eightyone/FDCs/didaktik.gama.rom and stores its
  full path in CurRom when present; memory_load reduces the path to its
  basename and serves the embedded copy.
  ref: libretro/libretro_core.cpp:2953-2968, 81/Source/Spectrum/spec48.cpp:361-362

  ZXpand writes zxpand-eeprom.bin (256 bytes of 0xFF) under the ROM
  directory when it is absent.
  ref: 81/Source/zxpand/smbsd.cpp:75-98

  Digitalker is a stub and its SSR ROM loader is not compiled; CapsImg is
  linked statically.
  ref: libretro/eo_stubs.cpp:67-68, CMakeLists.txt:267-291

files: []