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the Gryphel Project


The goal of the Gryphel Project is to help preserve software made for early Macintosh computers, the computers that Apple sold from 1984 to 1996 based upon Motorola’s 680x0 microprocessors.

Mini vMac

The center of this project - a family of free and open source emulators that allow such software to be used on modern computers

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The rest of this project - software for the early Macintosh, links to alternatives to Mini vMac, links to related forums, lists of books, and more.

Latest News : November 27, 2016

In the latest Mini vMac Development source snapshot, the build system is updated to allow compiling a version emulating a Macintosh Plus on OS X Intel (using C code for the CPU emulation) that is about as fast as in Mini vMac 3.4 (which has hand tuned assembly for CPU emulation), or compiling a version emulating a Macintosh II about as fast, whereas Mini vMac 3.4 is much slower emulating the Macintosh II (since there is no hand tuned assembly for the 68020 CPU). The build system only generates the special compiler options for the specific compiler version I use (and use for the Variations Service), since verifying that they work and work well for all possible versions of gcc would be extremely time consuming. For other compiler versions, with only the more generic options, it will work, but may not be quite as fast.

But most of the work this week was in further refinements of lazy evaluation of the condition code register, and in numerous other tweaks to improve the code generated by the compiler.

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Recent News - Previous release notes

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