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Title is clickbait... the Z80 does not have "protected mode" (x86-specific term), in the video protection of the I/O space is implemented using additional hardw
by blueflow 4y ago
Title is clickbait... the Z80 does not have "protected mode" (x86-specific term), in the video protection of the I/O space is implemented using additional hardware.
- matja 4y agoYeah, he built an MMU, which is possible for any 8-bit CPU with similar features - nice work but I don't see any previously unknown features.
- tyingq 4y agoPeople talk about the Z80 supporting bank switched RAM, which also requires a small amount of external logic gates but depends on CPU features that didn't exist in every 8 bit CPU of the time. This feels similar.