Reverse-engineering the Behringer DDX3216: Building a custom x86 BIOS to run MS-DOS
By
rasz
1d ago· 27 min readen
100/100
Golden Brown
Bagelometer↗
A baker's-dozen of insight crammed into one ring.
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Summary
A detailed technical blog post documenting the author's journey reverse-engineering the Behringer DDX3216 digital mixing console and building a custom x86 BIOS from scratch to run MS-DOS on the device. The author shares their personal computing history starting in 1994, then describes the technical process of understanding the DDX3216's hardware architecture, writing a BIOS, and getting DOS operational on the mixer hardware.
Key quotes
· 3 pulledIn 1994 I got my first computer: an Intel i486 DX2-66 with 4 MB RAM and a 512MB harddisk.
I learned upgrading this machine, installing new software and finally learned how to program new software using BASIC. But I never got in touch with the boot-process or the details of MS-DOS.
I learned from some screenshots of the DDX3216, that Behringer used...
In 1994 I got my first computer: an Intel i486 DX2-66 with 4 MB RAM and a 512MB harddisk. The software was IBMs OS/2 and Microsofts Windows 3.11. In the next four years I was upgrading this machine every few months with more RAM (up to 16MB), a CD-ROM-dri
