Apple Macintosh System Software 7.1 source (m68k and basic PPC) | Hacker News Reader

Apple Macintosh System Software 7.1 source (m68k and basic PPC)

github.com

56 pointslioeters24 comments

It says "Dates back to early 2010's" ...what this means is that the leaked source has been around since then (so it's nothing new). I've known of its availability for at least 15 years.

System 7.1 was released 1992.

Are you aware of earlier source leaks, like System 6.x?

There's IIGS 6.0.1 Source Code available, but even more interesting is the source for A/UX, which is UNIX System V 2.2 specially adapted to have the System 7 graphical interface running as a UNIX application.

Pardon my redditism but I like your extremely relevant username

The ROM source has several change logs mentioning “PDM”

Deadware should be open source under the law.

Also on archive.org: https://archive.org/details/sys71src-main

Better to archive a complete copy. See the other comments. https://news.ycombinator.com/item?id=41137035

The copy on archive.org is effectively identical to the one I linked - it's not from the partial copy in the submission.

Oh, thanks! I shouldn't have assumed.

It’s fun to see how four languages live in this codebase - C, Pascal, 68k and PPC assembly.

CORRECTION: I was speaking out if my ass - the ROM was 68k only. Thanks for duskwuff for correcting me.

Where do you see PPC assembly? The code in OS/PPC appears to be 68k assembly. On PPC machines, it would run on a 68k emulator (the source of which isn't in here, I don't think).

> Where do you see PPC assembly?

There is none. This code leak dates to before the PowerPC transition.

OS:PPC: is Program to Program Communications, not PowerPC.

My bad! That’s what I get for a cursory skim.

Thanks for the clarification!

This is source of the "SuperMario" 2MB ROM first shipped with the AV Quadras: https://macintoshgarden.org/apps/mac-os-71-source-code

Feature list: https://web.archive.org/web/20220926134250/https://support.a...

“The Centris 660AV and Quadra 840AV are the first Macintosh computers to implement a 2MB ROM using two 512Kx16 chips. The new ROM is also the first ROM that contains code for portions of System 7 that were able to be moved to the ROM, freeing up RAM for applications and other system use.”

Gary Davidian recollection: https://archive.computerhistory.org/resources/access/text/20...

“[F]or the Quadra 840AV they were starting [a universal ROM] over and with a newly built ROM from new sources and incorporating a lot of the stuff from System 7”

“It was called the Super Mario ROM. I don't know why it was called that but that was what it was called. So [AV Quadras] were the first Super Mario ROM product. And so yeah, I wanted— they had to ship and then, you know, System 7 was out before us and it forced us to bump RAM to 8 megabytes from 4.”

So this is the ROM and not the full OS?

It's not even the full ROM. The toolbox source is not there, for example.

Oh, you're right - this repo looks like someone started uploading the leaked source and got interrupted partway through.

There's a more complete version here, among other places:

https://github.com/historicalsource/supermario/tree/master/b...

for those interested, note that the encoding of these files is of course "Mac Roman"

This leaked "source" has tons of archive and object files without corresponding source code.

I see a couple of object files under 'Libs/', but by far most of the regular files are 68k assembly sources (the '.a' files) - and those also look manually written, not disassembled and commented. Maybe you mistook the file extension '.a' for GCC static libraries / archives?

Yes, thanks for the heads up.

See this comment https://news.ycombinator.com/item?id=41137035

Reply on news.ycombinator.com