emulator: RB5000
type: standalone + libretro
core_classification: official_port
source:
  standalone: "https://gitlab.com/recalbox/packages/standalone/rb5000"
  libretro: "https://gitlab.com/recalbox/packages/recalbox-cores/libretro-rb5000"
upstream: "https://gitlab.com/recalbox/packages/standalone/rb5000"
profiled_date: "2026-10-17"
source_commit:
  standalone: "8c75a4b48a5222b0332d0508600f8ddc7ac1191c"
  libretro: "7464996aa0cb1be77abf495dc901117e1af36e02"
core_version:
  standalone: "v1.1"
  libretro: "v0.9"
display_name: "Philips - VG 5000 (RB5000)"
cores:
  - "rb5000"
systems:
  - "philips-vg5k"

notes: |
  Philips VG 5000 emulator by Recalbox, a C++ fork of Daniel Coulom's
  DCVG5K v2. The standalone build and the libretro core live in
  two repositories and share the same Engine.

  The 16 KB system ROM is not a file. It is encoded in the
  Video::sPixels image table compiled into the binary, one ROM bit per
  entry as bit 0 XOR bit 5 (ref: source/Data.cpp:2). The Engine
  constructor copies that table into sMirror (ref: source/Engine.cpp:54)
  and Z80ReadW() rebuilds each ROM byte from eight table entries the
  first time the CPU reads it, caching it in mMemory
  (ref: source/Engine.cpp:379-389). The libretro core carries the same
  table and decoder.

  The libretro core can map a user cartridge file over 0x0000-0x3FFF
  when one is configured (ref: source/Engine.cpp:302-316); that file is
  content. The on-screen display font is an Ubuntu TTF from the host
  system fonts directory (ref: source/Video.cpp:90-92).

exclusion_note: "VG 5000 system ROM is encoded in a compiled-in image table and decoded on first access; no file is read"
files: []