[Coco] Zork 1,2 and 3, and 6502 MS Basic are now open source

[Allen Huffman]

> On Nov 20, 2025, at 1:07 PM, John Guin via Coco <coco at maltedmedia.com> wrote:
> 
> Hoping 6809 Basic will be next.
> 
> https://opensource.microsoft.com/blog/author/scott-hanselman
> 
> And MS-DOS 4 as well, if I read this correctly.  As I look at Scott's page, the timestamps are only minutes old…


Thanks for sharing this news, John. I was unaware that Infocom Zork 1-3 was released:


https://github.com/historicalsource/zork1

…though I don’t understand what Microsoft had to do with that.

If Microsoft was contracted to do the builds for various home computers (like the CoCo), it would be wonderful if they still had the actual source code they used to make COLOR BASIC 1.0 and later.

The source code from Microware’s patch for SECB on the CoCo 3 still exists, but I am sure if Microware had access to the Microsoft source code or if they did a disassembly or used the Unravelled books as reference.

		— A