C64 Ultimate

Commodore 64 Ultimate — hardware pair

Web: c64-ultimate.html
Pair ID: pair-c64-ultimate · Catalog: 004-computers/c64_ultimate

Grok16 does not run on classic Commodore 64 silicon. This lane documents pairing with the new FPGA hardware from commodore.net and the c64_ultimate_fpga chip battery used by Queen.

The new C64 (2025–2026)

Model	Form	Ship
Commodore 64 Ultimate (c64u)	Breadbin	2025
Commodore 64C Ultimate (c64cu)	Slimline (original 1986 tooling)	Late 2026

Core: AMD Xilinx Artix-7 FPGA (cycle-accurate) · dual SID sockets (6581/8580) · HDMI/USB/Wi-Fi · .PRG/.D64/.TAP media.

What Grok16 does here

Layer	Role
Host	Build and run g16 on Linux/macOS/Windows — normal bootstrap platforms
Chip battery	c64_ultimate_fpga — FPGA core, HDMI bridge, SID sockets
Queen	Game room c64_ultimate · app_id: C64U · pair/C64Ultimate
C64 Ultimate	Runs Commodore media — Grok16 does not deploy g16 onto the machine

export G16_PREFIX="$(pwd)" G16_BELT_PROFILE=belt_2_0
./scripts/grok16-toolchain.sh rebuild

Load .PRG/.D64 on the C64 Ultimate via USB/CommoServe — that is C64 software, not a g16 binary.

Classic C64 is separate

Breadbin 1982 hardware is catalogued under C64-Classic (retro_c64) — not this pair.

Doctrine: data/grok16-platform-release.json (pair-c64-ultimate) · data/g16-linker-doctrine.json (hardware_pairs).

Related

• C64 (index) · Platforms · Batteries · Release