# AROS open firmware: provenance, source and license

Copyright the AROS Development Team and contributors. The AROS Research Operating
System firmware is distributed under the AROS Public License (APL) version 1.1.
A complete unmodified copy is in [license.html](license.html), also available at
https://aros.sourceforge.io/license.html. Both firmware pairs are redistributed unmodified. No proprietary Commodore Kickstart firmware is included.

## Source availability

The Source Code version of AROS is available under the AROS Public License from
its official development repository:

- Browse: https://github.com/aros-development-team/AROS
- Download source: https://github.com/aros-development-team/AROS/archive/refs/heads/master.zip
- Official source and build instructions: https://aros.sourceforge.io/documentation/developers/compiling.php

No modifications were made to the AROS Covered Code. Upstream identifies the A1200
pair as the AROS m68k build of 2026-08-20, but does not record its exact AROS
source revision. The source download above is the official source tree, not a
claim that its current HEAD reproduces the historical binary byte for byte.

## Binary provenance and reproducible retrieval

Retrieved 2026-10-31 from the already pinned Scripted Amiga Emulator revision
`8ebce7b8beb9ebe243e5ea7b5150b3f16f665303`:

- Main ROM: https://raw.githubusercontent.com/naTmeg/ScriptedAmigaEmulator/8ebce7b8beb9ebe243e5ea7b5150b3f16f665303/db/aros-amiga-m68k-rom.bin
- Extended ROM: https://raw.githubusercontent.com/naTmeg/ScriptedAmigaEmulator/8ebce7b8beb9ebe243e5ea7b5150b3f16f665303/db/aros-amiga-m68k-ext.bin
- Upstream provenance: https://github.com/naTmeg/ScriptedAmigaEmulator/blob/4984eddfb4bd43bbaf309ba8f86dbe418476e3b7/db/README.md

SAE commit `4984eddfb4bd43bbaf309ba8f86dbe418476e3b7` describes these as the
2026-08-20 build from vAmiga. vAmiga introduced that pair in commit
`35de004a2f1502c2811b9a8ebcde4d0979a98937`.

| File | Bytes | CRC32 | SHA-256 |
| --- | ---: | --- | --- |
| aros-amiga-m68k-rom.bin | 524288 | 7ae94477 | fe97599321ed9a665637a9f57ec7be7b21498bd17b4c7a32b8bf1a95ae9588a4 |
| aros-amiga-m68k-ext.bin | 524288 | 6f9a4ad2 | 5f078fa9be00f395d4ab2fdfb35d3fce0fd7a0312767d611664635fd10c14901 |

## Integration

Both `/amiga/` and the protected `/dev/amiga/` alias load the two fixed open
firmware pairs. `REGAME_AMIGA_ROM` is never consulted. The player offers A500
(68000, ECS Agnus/original Denise, 1 MiB CHIP plus 2 MiB compatibility fast RAM)
and A1200 (68020/AGA, 2 MiB CHIP plus 4 MiB fast RAM). The A500's CHIP RAM stays
exactly 1 MiB; the additional fast RAM avoids the open-firmware no-fast loading
allocation failure. This is a tested configuration, not a minimum-RAM claim.
A500 selects the SVN55696 (2019) pair below; A1200 retains the 2026 pair above.
Main and extended firmware are set separately; the lowercase `aros` ROM filename
selects SAE's built-in AROS compatibility path. The external custom game disk is
not part of AROS or this firmware distribution.

## A500 compatibility firmware

The A500 uses the older unmodified AROS m68k SVN55696 (2019) pair. The 2026 pair
reached a post-loader ROM wait on the 68000 profile in browser testing; the 2019
pair reached the native Fort Apocalypse title. The A1200 continues to use the
2026-08-20 pair documented above. No proprietary firmware is used by either.

The A500 files were retrieved 2026-10-31 from the pinned vAmiga revision
`35de004a2f1502c2811b9a8ebcde4d0979a98937`:

- Main ROM: https://raw.githubusercontent.com/dirkwhoffmann/vAmiga/35de004a2f1502c2811b9a8ebcde4d0979a98937/Resources/Assets.xcassets/Binary/aros-svn55696-rom.dataset/aros-amiga-m68k-rom.bin
- Extended ROM: https://raw.githubusercontent.com/dirkwhoffmann/vAmiga/35de004a2f1502c2811b9a8ebcde4d0979a98937/Resources/Assets.xcassets/Binary/aros-svn55696-ext.dataset/aros-amiga-m68k-ext.bin

| File | Bytes | CRC32 | SHA-256 |
| --- | ---: | --- | --- |
| a500/aros-amiga-m68k-rom.bin | 524288 | 3f4fcc0a | 9fb24d10af0b17d44600490d0b6de73fa66dc89878517d148edc3b3167bbeb93 |
| a500/aros-amiga-m68k-ext.bin | 524288 | f2e52b07 | b24bcd442a65e653cc815d65f665162b683b7a0a998e9b36fbc0076b5cbeafe4 |

These binaries are covered by the same AROS Public License 1.1 and official
source access notice above. SVN55696 is the upstream build label; an exact Git
source revision was not supplied with these binaries. Current source HEAD is
not claimed to reproduce this historical pair byte for byte.
The fixed `/amiga/rom-a500` and `/amiga/extended-rom-a500` routes serve only this
open pair. Player profile metadata chooses both ROMs before startup; it does not
change the protected game-delivery session or reconstruct different game bytes.