Framework hints at CardBus expansion
- Framework hinted that a CardBus add-on could exist for the Framework Laptop 16, but only through a custom Expansion Bay design rather than a normal side card. - The key constraint is physical and electrical: CardBus uses a 68-pin PC Card format, while Framework’s rear Expansion Bay exposes an open PCIe x8 interface. - That matters because Framework already ships open Expansion Bay docs and modules, so oddball community hardware now looks more plausible than hypothetical.
Framework’s tease here is not really about CardBus. It’s about how far the Laptop 16’s modularity can stretch when someone is willing to build weird hardware for it. The specific idea was a CardBus adapter for old cards — the kind of expansion format that lived in late-1990s and early-2000s laptops. Framework’s answer was basically: not as a normal Expansion Card, but maybe through the Laptop 16’s rear Expansion Bay if someone designs it. That is a small comment, but it says a lot about what Framework thinks the machine is for. ### What is CardBus again? CardBus was the 32-bit version of the old PC Card standard. It used the same 68-pin card shape as PCMCIA cards, but electrically it moved closer to PCI, with much more bandwidth than the earlier 16-bit cards. That made it useful for things like network adapters, storage, and other laptop peripherals before ExpressCard and then USB took over.? Because Framework’s side Expansion Cards are tiny USB-C-based modules. They are great for ports and small accessories, but they are nothing like a full CardBus socket in size, power, or interface. A CardBus adapter needs room for the slot itself, supporting electronics, and probably a bridge chip to translate between old CardBus signaling and whatever the host laptop actually exposes. The side bays are the wrong shape for that job. ### Why does the Expansion Bay make more sense? The Laptop 16’s rear Expansion Bay is the one part of the system built for bigger and stranger hardware. Framework describes it as an open area with access to a PCIe x8 interface, and the company explicitly pitches it to developers as a place for custom high-power modules. That is a much better starting point for a legacy adapter, because CardBus itself is PCI-like enough that a bridge-based design is at least imaginable. ### Has Framework actually opened this up? Yes — pretty aggressively. Framework published CAD and documentation for the Expansion Bay system on GitHub, and it already sells the Expansion Bay Shell plus the Dual M.2 Adapter as a shipping non-GPU module. The company has been pretty direct that the shell is meant for SSDs, extra I/O, and other
