How about using a high-capacity USB drive that would allow you to switch to any appropriate OS by powering down, switching chips, and rebooting? The addition of a "read- only" option (in hardware or software) when operating in virus infested environments would be a likely option to add value to the system. This is already an option, as current BIOS systems will allow booting from a USB device (unless I am not thinking this through, which is always possible).
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How about using a high-capacity USB drive that would allow you to switch to any appropriate OS by powering down, switching chips, and rebooting? The addition of a "read- only" option (in hardware or software) when operating in virus infested environments would be a likely option to add value to the system. This is already an option, as current BIOS systems will allow booting from a USB device (unless I am not thinking this through, which is always possible).