emulator: QEMU
type: libretro
source: "https://github.com/io12/qemu-libretro"
profiled_date: "2026-03-18"
core_version: "0.1.0"
display_name: "QEMU"
systems: [ibm-pc, x86, x86-64, ppc, sparc, sparc64, arm, aarch64, mips, riscv, s390x, m68k, alpha, hppa]

# QEMU (Quick Emulator) libretro core, based on QEMU 9.0.50.
# Supports x86_64, i386, PPC, Sparc, ARM, AArch64, MIPS, RISC-V, S390x, M68K, Alpha, HPPA.
# Opens .iso, .img, .qcow, .qcow2 files or custom .qemu_cmd_line for any architecture.
# Default architecture is x86_64 when loading .iso/.img/.qcow directly.
#
# All BIOS/firmware files are loaded from {retroarch_system_dir}/qemu/
# via qemu_add_data_dir(system_dir + "/qemu") in ui/libretro.c:659-660.
# QEMU resolves firmware by name through its data directory search path.

files:
  # ========================================================
  # x86 SYSTEM BIOS (SeaBIOS)
  # ========================================================
  - name: "SeaBIOS (128 KB)"
    path: "qemu/bios.bin"
    sha1: "f402170ee4f374c304a7ce0b139d6cecb1732aff"
    md5: "e9ca30100c47a26b66488444c5b0bd15"
    size: 131072
    required: true
    note: >
      SeaBIOS legacy BIOS for x86/x86_64 PC emulation. Default firmware
      loaded by pc_sysfw.c for standard PC machine types.
    source_ref: "hw/i386/pc_sysfw.c:222,243"

  - name: "SeaBIOS (256 KB)"
    path: "qemu/bios-256k.bin"
    sha1: "5fe6078506094333106e6b3f33c7185dea7f0268"
    md5: "d3dab3095c73cad67afd3cc16a88479c"
    size: 262144
    required: false
    note: >
      SeaBIOS 256 KB variant. Some machine types or configurations
      may prefer this larger image.
    source_ref: "pc-bios/meson.build:30"

  - name: "SeaBIOS microvm"
    path: "qemu/bios-microvm.bin"
    sha1: "56f33ced7ea0f7581d776396a0ac6cfe2c7c9257"
    md5: "9f0ddaf6f3b213798bd414273505f2ff"
    size: 131072
    required: false
    note: >
      Minimal SeaBIOS for the microvm machine type, a stripped-down
      x86 virtual machine with reduced device set.
    source_ref: "hw/i386/microvm.c:58"

  - name: "qboot ROM"
    path: "qemu/qboot.rom"
    sha1: "339d3a93c967491c9f1fffe963484386f48bd22c"
    md5: "387c48aef9497c6c2b914b1e6b9bc7aa"
    size: 16384
    required: false
    note: >
      Minimal x86 firmware for fast Linux kernel booting.
      Alternative to SeaBIOS for Linux-only workloads.
    source_ref: "pc-bios/meson.build:32"

  # ========================================================
  # x86 VGA BIOS (SeaVGABIOS / LGPL VGA BIOS)
  # ========================================================
  - name: "VGA BIOS (ISA)"
    path: "qemu/vgabios.bin"
    sha1: "63d87e2a6618c3a9b2aabecf03ac2456e5e63410"
    md5: "ecef0b49f8f4e61874f012eb12ba0e36"
    size: 38912
    required: true
    note: >
      Standard VGA BIOS from LGPL VGA BIOS project. Loaded by ISA VGA
      device (vga-isa). Default VGA for older machine types.
    source_ref: "hw/display/vga-isa.c:88, hw/display/vga_int.h:191"

  - name: "VGA BIOS Cirrus"
    path: "qemu/vgabios-cirrus.bin"
    sha1: "883eb2657ce29661a0466b6b41ce75411f37aad9"
    md5: "fcd3d3c0b07a9096693d69425cd940f6"
    size: 38912
    required: false
    note: >
      Cirrus Logic GD5446 VGA BIOS. Used by the cirrus-vga PCI
      device and cirrus-vga-isa ISA device.
    source_ref: "hw/display/cirrus_vga.c:3001, hw/display/cirrus_vga_isa.c:67"

  - name: "VGA BIOS stdvga"
    path: "qemu/vgabios-stdvga.bin"
    sha1: "87fbc0ecb1ee7d4d8c8c88c7d8a2fb3ec8f99ea5"
    md5: "8117c3fd986fbbe327badfe38e77db1d"
    size: 39424
    required: false
    note: >
      Standard VGA PCI BIOS (Bochs VBE extensions). Used by the
      VGA PCI device, the most common display adapter for x86.
    source_ref: "hw/display/vga-pci.c:387"

  - name: "VGA BIOS bochs-display"
    path: "qemu/vgabios-bochs-display.bin"
    sha1: "9e2edd3d835219cde63a20e2cd58107d7e96ef5b"
    md5: "83e39bd3e056291ee50d2b5d937bab3e"
    size: 28672
    required: false
    note: "Bochs display device VGA BIOS. Simpler non-VGA display adapter."
    source_ref: "hw/display/bochs-display.c:365"

  - name: "VGA BIOS ramfb"
    path: "qemu/vgabios-ramfb.bin"
    sha1: "49df9be557f0f0277c8fedb889257e279586d536"
    md5: "c55512e313c4cb08ec5a36198fdfef33"
    size: 28672
    required: false
    note: "RAM framebuffer VGA BIOS for simple display output."
    source_ref: "hw/display/ramfb.c:150"

  - name: "VGA BIOS ATI"
    path: "qemu/vgabios-ati.bin"
    sha1: "ded141cacdebf557ec552597cbf57cd989cec3e2"
    md5: "013cb287a295dc6c039921c6883a767e"
    size: 39424
    required: false
    note: "ATI VGA BIOS for emulated ATI display adapter."
    source_ref: "hw/display/ati.c:1066"

  - name: "VGA BIOS QXL"
    path: "qemu/vgabios-qxl.bin"
    sha1: "527227abd5f3348c382d4b02703389fbeb83b067"
    md5: "558420a5ad839b10906d5d73e92a4160"
    size: 39424
    required: false
    note: "QXL paravirtual display VGA BIOS."
    source_ref: "hw/display/qxl.c:2512"

  - name: "VGA BIOS VirtIO"
    path: "qemu/vgabios-virtio.bin"
    sha1: "cddc53b94793609d1e837d78cd5468fcc1ed9164"
    md5: "8f1e5e497342c503f62a50912f0447e0"
    size: 39424
    required: false
    note: "VirtIO GPU VGA BIOS."
    source_ref: "hw/display/virtio-vga.c:233"

  - name: "VGA BIOS VMware"
    path: "qemu/vgabios-vmware.bin"
    sha1: "c54901ab8f526ab201ebf1b3ecdf711e38e6c259"
    md5: "6635fe944eab228ae01c814107674199"
    size: 39424
    required: false
    note: "VMware SVGA II display VGA BIOS."
    source_ref: "hw/display/vmware_vga.c:1349"

  # ========================================================
  # x86 OPTION ROMs (loaded on demand)
  # ========================================================
  - name: "KVM VAPIC"
    path: "qemu/kvmvapic.bin"
    sha1: "670c9cc79b4859944705eece710dc332188b79b4"
    md5: "b8cec9572e408a3259914f9aba8664cb"
    size: 9216
    required: false
    note: >
      KVM virtual APIC option ROM. Loaded as option ROM for
      APIC acceleration on x86.
    source_ref: "hw/i386/vapic.c:733"

  - name: "Linux boot ROM"
    path: "qemu/linuxboot.bin"
    sha1: "fd19bef7f5647960952520389f448364762ed948"
    md5: "ab40dea9ff35ec29b506fdae5bf11463"
    size: 1024
    required: false
    note: "Option ROM for direct Linux kernel booting via -kernel."
    source_ref: "hw/i386/x86-common.c:964"

  - name: "Linux boot DMA ROM"
    path: "qemu/linuxboot_dma.bin"
    sha1: "0bff50c10727bd9c85c831ea92b7a52699959992"
    md5: "8cb622dc1c9290a019a801e972c9e4f9"
    size: 1536
    required: false
    note: "DMA-capable option ROM for direct Linux kernel booting."
    source_ref: "hw/i386/x86-common.c:966"

  - name: "Multiboot ROM"
    path: "qemu/multiboot.bin"
    sha1: "a8b58ae464fc6fb26799432ae867bf57c546ff80"
    md5: "552a0c03c40bb3ec292f5349ea29cf86"
    size: 1024
    required: false
    note: "Option ROM for Multiboot kernel loading."
    source_ref: "hw/i386/multiboot.c:408"

  - name: "Multiboot DMA ROM"
    path: "qemu/multiboot_dma.bin"
    sha1: "32ab1cf336b674bfb154eb7a939a3e3275a92647"
    md5: "e942cc4f612050c7331d33a34b0d5192"
    size: 1024
    required: false
    note: "DMA-capable option ROM for Multiboot kernel loading."
    source_ref: "hw/i386/multiboot.c:406"

  - name: "PVH boot ROM"
    path: "qemu/pvh.bin"
    sha1: "c2191e6495103c1f43e9b6ca8930e44c2245e476"
    md5: "bb045d6f0380ad2af3531edeff92a117"
    size: 2048
    required: false
    note: "Option ROM for PVH (paravirtualized hardware) ELF booting."
    source_ref: "hw/i386/x86-common.c:735"

  # ========================================================
  # PXE NETWORK BOOT ROMs (iPXE)
  # ========================================================
  - name: "PXE e1000"
    path: "qemu/pxe-e1000.rom"
    sha1: "368e8e9827ae8757a7449319831078b6d5efb83f"
    md5: "898d7d0b3ed4a030c877b9185b4ef6be"
    size: 67072
    required: false
    note: "iPXE PXE boot ROM for Intel e1000 NIC (8086:100e)."
    source_ref: "pc-bios/README"

  - name: "PXE eepro100"
    path: "qemu/pxe-eepro100.rom"
    sha1: "b19572c9c2a11f03282df81c0397aceed409a86c"
    md5: "2f8279177fdc2ce5abc47d9f1e303db1"
    size: 61440
    required: false
    note: "iPXE PXE boot ROM for Intel eepro100 NIC (8086:1209)."
    source_ref: "pc-bios/README"

  - name: "PXE ne2k_pci"
    path: "qemu/pxe-ne2k_pci.rom"
    sha1: "f37f43f89dc99afe0442ee0b7a431ee790ad6bf6"
    md5: "095cdf2b26084ce22adb883e9c43fc5a"
    size: 61440
    required: false
    note: "iPXE PXE boot ROM for NE2000 PCI NIC (1050:0940)."
    source_ref: "pc-bios/README"

  - name: "PXE pcnet"
    path: "qemu/pxe-pcnet.rom"
    sha1: "13a039bf9916f1db42d3a019591d372b4cf4aee9"
    md5: "15e38b82922a058c6df6eaffbad1b916"
    size: 61440
    required: false
    note: "iPXE PXE boot ROM for AMD PCnet NIC (1022:2000)."
    source_ref: "pc-bios/README"

  - name: "PXE rtl8139"
    path: "qemu/pxe-rtl8139.rom"
    sha1: "7b512c0a7a13bc3c254a25237e4d4612170f4391"
    md5: "22f4b6ae5650988f999ee651a3734462"
    size: 61440
    required: false
    note: "iPXE PXE boot ROM for Realtek RTL8139 NIC (10ec:8139)."
    source_ref: "pc-bios/README"

  - name: "PXE virtio"
    path: "qemu/pxe-virtio.rom"
    sha1: "3e3f77cfe70af904133db94f27ec24e3c9c43648"
    md5: "91ad9770f5717a89d518534f45f1332d"
    size: 60416
    required: false
    note: "iPXE PXE boot ROM for VirtIO NIC (1af4:1000)."
    source_ref: "pc-bios/README"

  # ========================================================
  # EFI NETWORK BOOT ROMs (iPXE UEFI)
  # ========================================================
  - name: "EFI e1000"
    path: "qemu/efi-e1000.rom"
    sha1: "a3df5fc33ab0190f470b34104ff3c0679cecbab6"
    md5: "d8330b99643e31b51e7710fa26c7e859"
    size: 159232
    required: false
    note: "iPXE EFI boot ROM for Intel e1000 NIC."
    source_ref: "hw/net/e1000.c:1708"

  - name: "EFI e1000e"
    path: "qemu/efi-e1000e.rom"
    sha1: "1d37f3ae6748d4deefe9fd5188a2f557bf265d61"
    md5: "a55bf3f4988d4a736c71a1300636cd69"
    size: 159232
    required: false
    note: "iPXE EFI boot ROM for Intel e1000e NIC."
    source_ref: "hw/net/e1000e.c:689"

  - name: "EFI eepro100"
    path: "qemu/efi-eepro100.rom"
    sha1: "956d9592fea33374ef0f1900a185b6e1109ea765"
    md5: "d2a2f92710f5a9f77281e9492a249afb"
    size: 159232
    required: false
    note: "iPXE EFI boot ROM for Intel eepro100 NIC."
    source_ref: "hw/net/eepro100.c:2077"

  - name: "EFI ne2k_pci"
    path: "qemu/efi-ne2k_pci.rom"
    sha1: "adb7199f545fdb66c325b142c8dbc4cddb99a20d"
    md5: "10b66275b3644af301c64a3c545c3daf"
    size: 157696
    required: false
    note: "iPXE EFI boot ROM for NE2000 PCI NIC."
    source_ref: "hw/net/ne2000-pci.c:111"

  - name: "EFI pcnet"
    path: "qemu/efi-pcnet.rom"
    sha1: "9e5a4bb247c6a1777c89117ca091f94342b9046d"
    md5: "374696f4fffa83c9cf18272212c21d83"
    size: 157696
    required: false
    note: "iPXE EFI boot ROM for AMD PCnet NIC."
    source_ref: "hw/net/pcnet-pci.c:267"

  - name: "EFI rtl8139"
    path: "qemu/efi-rtl8139.rom"
    sha1: "99a1e431cc0cb0a78d5803875dfa687e12a947f4"
    md5: "f81dbbd7001a8db631f2a548b7d08c4e"
    size: 160768
    required: false
    note: "iPXE EFI boot ROM for Realtek RTL8139 NIC."
    source_ref: "hw/net/rtl8139.c:3423"

  - name: "EFI virtio"
    path: "qemu/efi-virtio.rom"
    sha1: "1596e9b97f0bc8b5ff3e444235690a549ee982c6"
    md5: "d3887f04c23035cae3f0e1075deea459"
    size: 160768
    required: false
    note: "iPXE EFI boot ROM for VirtIO NIC."
    source_ref: "pc-bios/meson.build:58"

  - name: "EFI vmxnet3"
    path: "qemu/efi-vmxnet3.rom"
    sha1: "6557242402387a6319a0db6abb916ada48e1391c"
    md5: "ea1ba222dbd5aa356ea1f29393ae55e1"
    size: 156672
    required: false
    note: "iPXE EFI boot ROM for VMware vmxnet3 NIC."
    source_ref: "hw/net/vmxnet3.c:2508"

  # ========================================================
  # POWERPC FIRMWARE
  # ========================================================
  - name: "OpenBIOS PowerPC"
    path: "qemu/openbios-ppc"
    sha1: "0ef5051dcb318c0bc45d1908f8318d6eece8686a"
    md5: ""
    size: 677196
    required: false
    note: >
      OpenBIOS (IEEE 1275 Open Firmware) for PowerPC emulation.
      Required for -M mac99, -M g3beige and other PPC machines.
    source_ref: "pc-bios/README"

  - name: "SLOF (Slimline Open Firmware)"
    path: "qemu/slof.bin"
    sha1: "a03a94acfe555804d66cc6c74760ae1375a71a64"
    md5: ""
    size: 995000
    required: false
    note: >
      IBM SLOF firmware for pSeries (POWER) machine type.
      Built from qemu-slof-20230918 tag.
    source_ref: "pc-bios/README"

  - name: "skiboot"
    path: "qemu/skiboot.lid"
    sha1: "8052069aa9714c23be05b4e62fb245a3d572cb0f"
    md5: ""
    size: 2527328
    required: false
    note: >
      OPAL firmware for OpenPOWER PowerNV (non-virtualized) machine type.
    source_ref: "pc-bios/README"

  - name: "VOF (Virtual Open Firmware)"
    path: "qemu/vof.bin"
    sha1: "fc737b34a390f5752cb7e35b33d71f4f438ab607"
    md5: ""
    size: 3456
    required: false
    note: "Minimal Open Firmware shim for -machine pseries,x-vof=on."
    source_ref: "pc-bios/README"

  - name: "VOF NVRAM"
    path: "qemu/vof-nvram.bin"
    sha1: "5d1184609b87f78635f0575467a1c3f440900ff0"
    md5: ""
    size: 16384
    required: false
    note: "NVRAM template for VOF (Virtual Open Firmware)."
    source_ref: "pc-bios/meson.build:83"

  - name: "U-Boot e500"
    path: "qemu/u-boot.e500"
    sha1: "9ea03f249f856cdcb4399cc1f5a5031729379911"
    md5: ""
    size: 421720
    required: false
    note: >
      U-Boot for PowerPC e500 (qemu-ppce500 target).
      Built from upstream denx u-boot, commit 2072e72.
    source_ref: "pc-bios/README"

  - name: "U-Boot SAM460"
    path: "qemu/u-boot-sam460-20100605.bin"
    sha1: "0399a79ac0cf77f0da70af9baec7548a3b368f0a"
    md5: ""
    size: 524288
    required: false
    note: "U-Boot for Sam460ex (AmigaOne) PowerPC board."
    source_ref: "pc-bios/meson.build:74"

  - name: "QEMU VGA Mac driver"
    path: "qemu/qemu_vga.ndrv"
    sha1: "638c6262a6eb579ec3d1c9292566ac94c942dc15"
    md5: ""
    size: 18752
    required: false
    note: "QemuMacDrivers VGA driver for PPC MacOS guests."
    source_ref: "pc-bios/README"

  # ========================================================
  # SPARC FIRMWARE
  # ========================================================
  - name: "OpenBIOS Sparc32"
    path: "qemu/openbios-sparc32"
    sha1: "5a4f2124c8f093f8aee99fbcebcf5d17d789ff26"
    md5: ""
    size: 382080
    required: false
    note: >
      OpenBIOS for Sparc32 emulation. Includes QEMU,tcx.bin
      and QEMU,cgthree.bin display drivers.
    source_ref: "pc-bios/README"

  - name: "OpenBIOS Sparc64"
    path: "qemu/openbios-sparc64"
    sha1: "c6e215fe460629d35688ab8e51faf6f765827cd6"
    md5: ""
    size: 1593408
    required: false
    note: "OpenBIOS for Sparc64 (UltraSPARC) emulation."
    source_ref: "pc-bios/README"

  - name: "QEMU TCX display"
    path: "qemu/QEMU,tcx.bin"
    sha1: ""
    md5: ""
    required: false
    note: "TCX framebuffer FCode driver for Sparc32 OpenBIOS."
    source_ref: "pc-bios/meson.build:45"

  - name: "QEMU cgthree display"
    path: "qemu/QEMU,cgthree.bin"
    sha1: ""
    md5: ""
    required: false
    note: "CG3 framebuffer FCode driver for Sparc32 OpenBIOS."
    source_ref: "pc-bios/meson.build:46"

  # ========================================================
  # ALPHA FIRMWARE
  # ========================================================
  - name: "Alpha PALcode"
    path: "qemu/palcode-clipper"
    sha1: "47b0870aaa45a7aa0d48847fd905908fb06f3e9f"
    md5: ""
    size: 153728
    required: false
    note: "PALcode firmware for Alpha (Clipper/DP264) machine emulation."
    source_ref: "pc-bios/README"

  # ========================================================
  # RISC-V FIRMWARE
  # ========================================================
  - name: "OpenSBI RISC-V 32"
    path: "qemu/opensbi-riscv32-generic-fw_dynamic.bin"
    sha1: "7a23dfdeef3d78ffc89d86e89fc06a36f1e4386f"
    md5: ""
    size: 268312
    required: false
    note: >
      OpenSBI (Supervisor Binary Interface) firmware for RISC-V 32-bit.
      Required for riscv32-softmmu machine types.
    source_ref: "pc-bios/README"

  - name: "OpenSBI RISC-V 64"
    path: "qemu/opensbi-riscv64-generic-fw_dynamic.bin"
    sha1: "6883bfd1991c0ef0d67b0967e7dcbd60420dd480"
    md5: ""
    size: 272504
    required: false
    note: >
      OpenSBI firmware for RISC-V 64-bit.
      Required for riscv64-softmmu machine types.
    source_ref: "pc-bios/README"

  # ========================================================
  # S390X FIRMWARE
  # ========================================================
  - name: "S390 CCW firmware"
    path: "qemu/s390-ccw.img"
    sha1: "7b4fa888d32ca8ddbc752f7442e4d055cee1871a"
    md5: ""
    size: 42608
    required: false
    note: "Channel Command Word boot firmware for s390x emulation."
    source_ref: "pc-bios/meson.build:68"

  - name: "S390 network boot"
    path: "qemu/s390-netboot.img"
    sha1: "f6cec671408117bd9a31e982682662f27ef4fb2c"
    md5: ""
    size: 67232
    required: false
    note: "Network boot firmware for s390x emulation."
    source_ref: "pc-bios/meson.build:69"

  # ========================================================
  # HP-PA FIRMWARE
  # ========================================================
  - name: "HP-PA firmware (32-bit)"
    path: "qemu/hppa-firmware.img"
    sha1: "605c36ede6c120c6cc7efe147a75a3dc4b7e4fb0"
    md5: ""
    size: 167820
    required: false
    note: "SeaBIOS-hppa firmware for 32-bit HP-PARISC emulation."
    source_ref: "pc-bios/README"

  - name: "HP-PA firmware (64-bit)"
    path: "qemu/hppa-firmware64.img"
    sha1: "b42f6d4ca74073de6c038579b4a9323ad0a6b398"
    md5: ""
    size: 206024
    required: false
    note: "SeaBIOS-hppa firmware for 64-bit HP-PARISC emulation."
    source_ref: "pc-bios/README"

  # ========================================================
  # DEVICE TREE BLOBS
  # ========================================================
  - name: "Bamboo DTB (PPC)"
    path: "qemu/bamboo.dtb"
    sha1: "ebdf1745479f4ec88459bbd9ef16ee1114018508"
    md5: ""
    size: 3211
    required: false
    note: "Device tree blob for PowerPC Bamboo (440EP) board."
    source_ref: "pc-bios/meson.build:88"

  - name: "Canyonlands DTB (PPC)"
    path: "qemu/canyonlands.dtb"
    sha1: "8a2fda0b4f23a92eb44776b5d7ffe951987062da"
    md5: ""
    size: 9779
    required: false
    note: "Device tree blob for PowerPC Canyonlands (460EX) board."
    source_ref: "pc-bios/meson.build:89"

  - name: "Petalogix ML605 DTB (MicroBlaze)"
    path: "qemu/petalogix-ml605.dtb"
    sha1: "892d265838866869b8a8ef104252ff5b2fda156f"
    md5: ""
    size: 9882
    required: false
    note: "Device tree blob for Xilinx Petalogix ML605 MicroBlaze board."
    source_ref: "pc-bios/meson.build:91"

  - name: "Petalogix S3ADSP1800 DTB (MicroBlaze)"
    path: "qemu/petalogix-s3adsp1800.dtb"
    sha1: "976600e3f89ecc1f3564b7077f53c58e0b565280"
    md5: ""
    size: 8161
    required: false
    note: "Device tree blob for Xilinx Petalogix S3ADSP1800 MicroBlaze board."
    source_ref: "pc-bios/meson.build:90"

  # ========================================================
  # OTHER
  # ========================================================
  - name: "NPCM7xx boot ROM"
    path: "qemu/npcm7xx_bootrom.bin"
    sha1: "22a75d26a0591d2c7763765b6381fa2f73de43e1"
    md5: ""
    size: 768
    required: false
    note: "Boot ROM for Nuvoton NPCM7xx BMC (ARM Cortex-A9)."
    source_ref: "pc-bios/README"

notes:
  bios_directory: >
    All files go in {retroarch_system_dir}/qemu/. The libretro core adds
    this path via qemu_add_data_dir() in ui/libretro.c:659-660.
  default_usage: >
    For typical x86/x86_64 usage (loading .iso/.img/.qcow files directly),
    only bios.bin (or bios-256k.bin) and vgabios.bin are strictly needed.
    Other VGA BIOS variants are loaded depending on the emulated GPU.
    PXE/EFI ROMs are only needed for network booting.
  multi_arch: >
    The libretro build supports 16 target architectures. Non-x86 firmware
    is only needed when using .qemu_cmd_line files that invoke a different
    qemu-system-* binary (e.g. qemu-system-ppc for MacOS 9).
  experimental: >
    This core is marked is_experimental=true in its .info file.
    Savestates are not supported.
  version: "Based on QEMU 9.0.50 (io12/qemu-libretro)"