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Digital echoes: open bus behavior on the compact Macintosh

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Digital echoes: open bus behavior on the compact Macintosh

While working on Snow, my vintage Macintosh emulator, I came across an interesting conflict in expectations of applications with regards to open bus behavior on these systems. In this article I’ll explain what open bus behavior is, how a compact Macintosh (the 128K, 512K, Plus, SE and Classic) behave and how this affects some applications.

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