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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


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 : May 19, 2019

A new version of ReAsm can now correctly assemble the Macintosh Plus ROM, from source disassembled by a new version FDisasm, if the “trap_names” and “abs_names” aren’t used.

ReAsm now supports the MoveC instruction, which is for 68020. The Macintosh Plus ROM uses this instruction to detect whether it is running on a 68020, which it will actually work with. Also supported is using an offset from a label, instead of just the label, such as in “Jmp (DT20 - $2)(D0.W)”.

FDisasm now has both an alpha branch and a stable branch, just like Mini vMac itself has different branches. The new alpha branch of FDisasm now uses “MoveC” instead of “MOVEC” (ReAsm is case sensitive), and outputs size “.L” for MoveC. Also the DBcc instructions are no longer given a “.W” size.


Previous release notes - Recent News


Thanks to Derek Etnyre, Tim Rodgers, John Feinberg, Lance Lannigan, Japhy Riddle, John Prchal, John Leake, Bronstrup Creative, Bruce Rayne, Ellery Bann, Matthew Tubbs, Thomas Jouneau, Sharon Lam, Macintosh Repository, Randall Trowbridge, Golan Klinger, FUJITA TAKUJI, Richard Lawson, David OConnor, Polycarpos Kostrivas, Bennett Foddy, Chris Hanson and Henry Shawcross for sponsoring three months of web hosting for the Gryphel project and over 23 days of health insurance.

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copyright (c) 2019 Paul C. Pratt