CF Card slot

The CF Card slot (Compact Flash) is found on select ThinkPads.

This is a CF+ Type II slot.

ISA based CompactFlash

This is implemented as a ISA device, that can support both CF memory cards, and CF IO cards (e.g. Bluetooth or WiFi).

This is handled by the Linux PCMCIA subsystem.

This is implemented as a PCI device, that can support both CF memory cards, and CF IO cards (e.g. Bluetooth or WiFi).

This is handled by the Linux PCMCIA subsystem.

NOTE!

On the X20, chip revision (80), and the X32, chip revision (aa), DMA is not supported (with a UDMA4 supporting card) according to hdparm.

This is implemented as a USB device, and can only support CF memory cards.

This is handled by the Linux USB Storage subsystem (usb-storage).