Welcome to the ReAmiga 4091 Project!

This project is brought to you by Stefan Reinauer and Chris Hooper.

ReAmiga 4091 Project

Key Features:

Fast SCSI-II (10MB/s max) controller for Amiga Computers
One of only two Zorro-III SCSI controllers ever designed
Full-length Zorro-III with DMA
Designed for the Amiga 4000; works in the Amiga 3000
Requires Super Buster 11
Based on NCR 53C710 chip
Reproduction based on an old board and PAL source code released as part of the Dave Haynie Archives.
80 components on the top; 147 components on the bottom
Manual build time is about 7 hours per board - plus Debugging ;)
The ReA4091 has been fully open sourced. Check out the ReA4091 GitHub project
Two versions: ReA4091 and the shorter ReA4091 Mini to keep your ISA/PCI slots available.
Modern Autoboot ROM (Open Source!)
- TD64 and NSD64 support for hard disks larger than 4GB
- Early Boot Diagnostics menu (press right mouse button during boot)
- CDROM boot support
- Also works on original A4091 boards

NEW! ReA4091 Mini

To address the challenges of the original's large size and high shipping costs -- and particularly because many Amiga users now have PCI daughterboards where the full-length A4091 would block a PCI slot -- we've developed the ReA4091 Mini. This compact version delivers all the performance and compatibility of the standard ReA4091 while keeping your adjacent PCI slots accessible for additional expansion cards.

Ordering

All pre-orders have been successfully fulfilled and the pre-order system has been permanently closed for the ReA4091 and the ReA4091 Mini. We're now developing an improved version called the A4092, designed with streamlined manufacturing to reduce build time. As a hobbyist project, this efficiency allows us to focus more on enhancements and innovation rather than assembly.

The A4092 is currently in development and expected to be available in a few months. Until then, ReA4091 and ReA4091 Mini boards may occasionally appear for sale on AmiBay.com or forum.a1k.org.

Talks & Slides

Check out Chris and Stefan talking about the creation of the ReA4091:

The Press

Media coverage of the ReAmiga 4091:

Amiga Addict Issue 25 (link)
Chris Edwards' Commodore A4091 Z3 SCSI controller review
Doug Compton's ReAmiga A4091 SCSI-2 Review on 10MARC
Interview with Chris and Stefan at AmiWest 2022
A fantastic detailed article on the Czech online magazine PROBER.cz

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