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M0 — Foundation & Feasibility

Goal

M0 freezes the initial contract for m68kDeb before installer implementation begins.

m68kDeb is an installation and preservation environment for Debian on classic MMU-equipped Motorola 68k computers. It is not initially a fork of the Debian package archive.

Decisions

CPU baseline

The project baseline is 68020 + MMU. 68020 with external PMMU, 68030, 68040 and 68060 are in scope. 68000/68010 and EC variants lacking an MMU are out of scope. 68020+MMU is a real support target, although slow configurations may receive strong performance warnings. FPU is not a universal minimum.

Platform families

Initial families are Commodore Amiga, Atari 68k and Apple Macintosh 68k. The shared installer must not assume one firmware, partition table, disk controller or bootstrap model.

Release model

Historical official m68k targets: Debian 2.0 Hamm, 2.1 Slink, 2.2 Potato, 3.0 Woody and 3.1 Sarge. Debian 4.0-era m68k work is an unofficial historical investigation target. Current Debian Ports/m68k is the modern target.

A listed release is an intended target, not a claim that every release/platform/machine combination is already qualified.

Installer architecture

native OS / platform bootstrap
            |
            v
   Linux kernel + initramfs
            |
            v
     shared m68kDeb core
       /      |       \
    Amiga    Atari    Mac68k
            |
            v
      release backend
   historical / current

Historical releases may use original release-specific installation mechanics where necessary. Fidelity and reliability take priority over forcing every Debian generation through identical mechanics.

Provenance and preservation

For redistributed or cached upstream artifacts, retain where available: original/archive origin, filename, size, cryptographic checksum, acquisition date, upstream signature information and relevant license/copyright metadata. Preservation copies of original Debian artifacts should remain byte-identical.

Historical systems must be clearly labelled obsolete and unsafe for routine exposure to untrusted networks.

Qualification vocabulary

  • SUPPORTED — intended by project policy.
  • QUALIFIED — reproduced successfully under a documented procedure.
  • UNVERIFIED — plausible/intended but not yet tested.
  • UNSUPPORTED — intentionally out of scope.
  • BLOCKED — intended but prevented by a known dependency/problem.

Emulator qualification and physical-hardware qualification are recorded separately.

M0 exit criteria

M0 passes when project scope, 68020+MMU policy, three initial platform families, release classes, manifest format, provenance rules, qualification terminology and the roadmap to a first current-Debian Amiga installer are committed.

M0 deliberately makes no blanket runtime PASS claim.