MMIO , PMIO , I/O MIO

https://ko.wikipedia.org/wiki/%EB%A9%94%EB%AA%A8%EB%A6%AC_%EB%A7%B5_%EC%9E%85%EC%B6%9C%EB%A0%A5

(위키피디아)

https://sites.google.com/site/hwangslabo/question-stack/mmiopmiolanmueos-inga

(MMIO, PMIO 및 RISC 특징)

http://shinluckyarchive.tistory.com/237

(MMIO 와 I/O MIO)

https://superuser.com/questions/703695/difference-between-port-mapped-and-memory-mapped-access

(영어 설명)