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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

More

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 : February 19, 2017

In the latest Mini vMac Development source snapshot, the emulation of the 68020 instructions is updated to not use the opcode, but instead only use the entry for the opcode in the OpDispatch table (as the 68000 instructions already do). The next step will be to do the same for F line instructions such as FPU calls. Then the only use of the opcode will be for that lookup, and so the opcode won’t need to be saved, in the most speed critical part of the program. This will help make the Mac II emulation perform exactly as fast as the Macintosh Plus emulation (where the opcode is already not saved).

Thanks to ClockWise for sponsoring over a day of health insurance costs for time I spend on the Gryphel project.

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Recent News - Previous release notes

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