Are PS/2 devices port mapped I/O devices?

Question

Are PS/2 devices like old-style mice and keyboard are port mapped I/O devices? Are there any PCI or USB devices which can be functioning as port mapped I/O devices?

score 3 · Accepted Answer · answered Apr 19 '22 at 08:08

3

The PS/2 keyboard controller is accessed via I/O ports 60h and 64h.

PCI and PCIe devices can provide either MMIO mapped or I/O mapped address ranges or both.

USB devices can only be accessed via the USB controller, which uses MMIO, not I/O ports.

answered Apr 19 '22 at 08:08

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Are PS/2 devices port mapped I/O devices?

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