emulator: Oberon
type: libretro
core_classification: community_fork
source: "https://github.com/libretro/oberon-risc-emu"
upstream: "https://github.com/pdewacht/oberon-risc-emu"
profiled_date: "2026-03-24"
source_commit: "5be71d885b87b7cd7c635bf330764fcc4f3905fe"
core_version: "2026-08-23"
display_name: "Oberon RISC Emulator"
cores:
  - oberon
systems: [oberon]

# Project Oberon RISC emulator by Peter De Wachter.
# Emulates the Oberon RISC processor designed by Niklaus Wirth.
# Bootloader (512 words) compiled into the binary from risc-boot.inc,
# loaded into ROM at 0xFFFFF800 on startup (src/risc.c:75-77,93).
# No retro_get_system_directory() call, so no files from system dir.
# Content: .dsk disk images loaded via retro_load_game (Libretro/libretro.c:219-227),
# opened read-write through the frontend VFS when one is offered
# (Libretro/libretro.c:149-162, src/disk.c:13-65).
# risc.c is identical upstream. disk.c differs only by that VFS file layer.

files: []

notes:
  boot_process: >
    Bootloader embedded in ROM reads boot sector from SPI disk, loads
    Oberon inner core into RAM. Content is raw sector .dsk images.