Commodore 64 Ultimate

The Commodore 64 Ultimate (also marketed as the C64U) is an FPGA-based hardware recreation of the Commodore 64 home computer, manufactured by the revived Commodore International Corporation. Preorders opened in July 2025, with first shipments beginning in October 2025 and broader distribution targeted for March–April 2026.^[1:1][2:1] The C64U was marketed as the first new hardware released under the Commodore name in over 30 years, following the brand's 2025 acquisition by a group led by retro YouTube creator Christian "Peri Fractic" Simpson.^[3:1][4:1]

The system is built around an AMD Xilinx Artix-7 FPGA on a mainboard designed by Dutch engineer Gideon Zweijtzer, the same designer responsible for the standalone Ultimate 64 on which the C64U is based.^[1:2][5:1] Three breadbin-style editions launched in 2025 — BASIC Beige, Starlight, and a limited Founders Edition — followed in April 2026 by a slimline Commodore 64C-form-factor variant, the Commodore 64C Ultimate.^{[6:1][7:1][8:1]}

Background

The Commodore name had been dormant for decades when, in June 2025, a group of investors led by Simpson reached a share purchase agreement with the previous owners of Commodore Corporation B.V. for a price reported in the low seven figures, approximately $1 million to $5 million.^[9:1] The acquisition closed on July 31, 2025, transferring all 47 trademarks dating back to 1983.^[4:1] The new Commodore International Corporation was co-founded by Simpson, Sean Donohue, and Leo Nigro, with Commodore-era engineers Al Charpentier, Jeri Ellsworth, Dave Haynie, Bil Herd, and RJ Mical attached as advisers.^[6:2]

The FPGA mainboard at the centre of the C64U is the work of Gideon Zweijtzer, who had previously developed and sold the Ultimate 64 — a standalone hardware FPGA recreation of the Commodore 64 marketed independently of any Commodore-branded product.^[5:1] The C64U and the Ultimate 64 therefore share a common hardware lineage, a fact that later became central to a firmware policy dispute (see Firmware policy controversy below).

Hardware

The C64U is built on an AMD Xilinx Artix-7 FPGA paired with 128 MB of DDR2 RAM and 16 MB of onboard NOR flash memory.^{[1:2][6:3][6:4]} Commodore partitions the 128 MB of system memory as 16 MB of system RAM, 16 MB for a RAM Expansion Unit (REU), 16 MB for GeoRAM, and the remainder as a RAM disk.^[10:1] The company characterises the design as an FPGA replication of the original C64 motherboard rather than software emulation.^[10:2] Through the C64U menu, users can also overclock the C64 core from its native 1 MHz up to 64 MHz and enable the 16 MB REU on demand.^[6:5]

Video and audio

Video output is supplied as HDMI at 1080p (50 Hz PAL or 60 Hz NTSC), and as analog signals through a DIN-8 connector carrying composite video (CVBS), S-Video, or RGB.^[6:6] Audio is generated by an eight-core FPGA implementation that Commodore calls UltiSID, alongside two onboard ZIF sockets that accept original MOS Technology 6581 or 8580 SID chips, allowing users to install authentic period silicon.^[6:7]

Ports and connectivity

The C64U preserves the original Commodore peripheral ports — cartridge slot, cassette port, serial port, and two 9-pin joystick or mouse ports — while adding HDMI, Ethernet, USB, and Wi-Fi. Wi-Fi connectivity is provided by an ESP32-S3 module attached to the FPGA.^[6:8] The original user port is preserved but routed through a separately sold $10 breakout adapter rather than exposed directly on the case rear.

Keyboard

The keyboard has 66 keys using Gateron Pro 3.0 mechanical switches rated at 55 g actuation force.^[6:9] An internal pin header on the motherboard preserves the original C64 keyboard connector, so a vintage C64 keyboard can be wired in directly if desired.^[6]

Editions

Three breadbin-form-factor editions launched in 2025; a slimline C64C-form-factor range followed in 2026.

Breadbin editions

At preorder launch, the BASIC Beige edition was offered at $299 and the Starlight Edition at $349.^[6:1] The Starlight Edition adds SID-reactive RGB LEDs in the case, keyboard, and power light, and uses a transparent keyboard PCB that Commodore promotes as a world first.^[10:3]

The Founders Edition, launched at $499, is limited to 6,400 units.^[3:2][7:1] It adds 24k gold-plated Commodore and Power badges, PVD-coated gold keycaps with illuminated legends, a translucent amber case, a commemorative gold-seal "share" certificate, and a 24k-gold Commodore-badges "dog tag" necklace.^[7:2]

By February 2026, list prices had been raised across the range. TechRadar reported the Beige edition at $349.99, the Starlight at $399.99, and the Founder's Edition at $549.99.^[2:2]

Slimline editions

On April 28, 2026, Commodore announced the Commodore 64C Ultimate, a slimline variant offering identical internal performance in the slimmer 1986 Commodore 64C form factor.^[8:1] The C64C Ultimate opened for preorder at $299.99 (BASIC Beige), $349.99 (Starlight), and $499.99 (Founder's Edition).^[8:2]

Operation and software loading

The C64U operates in two modes: a power-on boot to the native Commodore BASIC screen of the original C64, and a separate C64U menu reached via a multi-function switch. The menu exposes settings for video, audio, networking, peripherals, the turbo clock, and the RAM Expansion Unit.^[6:5]

Software can be loaded from USB, microSD, a built-in 1541 disk-image mount, a built-in cassette emulator, original cartridges, or real Commodore peripherals connected through the standard ports.^[6] Commodore promotes the C64U as compatible with more than 10,000 original Commodore 64 games, cartridges, and peripherals — a claim that, owing to the size of the catalogue, has not been independently verified in aggregate.^[3:3] The unit also offers Commodore's CommoServe File Search service, which connects over Wi-Fi or Ethernet to an online repository of games, demos, and music loadable directly without leaving the C64 environment.^[6] Each unit ships with a cassette-styled USB drive containing pre-loaded titles.^[10]

Reception

Tom's Hardware named the C64U an Editor's Choice in its December 2025 review by Les Pounder.^[6:10] The review observed that, although the FPGA platform comfortably exceeds the bare-metal capabilities of the original C64, fidelity to the original Commodore experience — not raw performance — is the platform's purpose.^[6]

In a February 2026 review for TechRadar, Jennifer Allen noted that the higher 2026 list prices place the system above impulse-buy territory and recommended it primarily for users planning long-term use rather than novelty.^[2:2]

Firmware policy controversy

In early 2026, Commodore announced its intent to restrict third-party firmware on the C64U, including firmware that Gideon Zweijtzer continues to publish for the closely related Ultimate 64. According to Tom's Hardware, the retro community was sharply divided over the decision.^[11:1]

The rationale published by Commodore's chief technical officer Marc Bilodeau was that the C64U's hardware roadmap was beginning to diverge from Zweijtzer's Ultimate 64, and that running firmware built for one platform on the other could cause damage that Commodore could not reasonably support.^[5:2] In the same statement, Commodore explicitly acknowledged that the FPGA board at the heart of the C64U was designed by Zweijtzer, the same engineer whose firmware Commodore now sought to block.^[5:1]