UPDATE: I added sound emulation and made it a bit faster, among other things. The sound can get a bit choppy, there's a switch to deactivate it in the settings. Also, it works in OS 2.2.

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Just out of curiosity, the Compact Mac screen is 512x342 pixels at 72 ppi which interpolates to 480x321 on the iPhone screen, which is 480x320 at 160 ppi. However, your emulated screen scrolls more than one pixel row beyond both edges of the iPhone screen. Wondered what factors affect the emulation screen size? Clearly you are maintaining the 512x342 aspect ratio rather than scaling it down to fit completely on the iPhone screen (I don't really consider the single pixel row to be significant). Is this an option that can be built-into Mini vMac or the iPhone port?