A4092 is scsi.meβs next-generation Zorro III Fast SCSI-2 controller for the Amiga 4000 and Amiga 3000. It follows the architecture of the Commodore A4091, but rebuilds it with modern components: a single Xilinx XC95144XL CPLD replaces 8 GAL chips, SPI Flash replaces the parallel EPROM, and the board uses an all-SMD, KiCad-based design. The goal is to reduce manufacturing complexity while improving signal integrity and compatibility.
In terms of features, A4092 supports Fast SCSI-2 synchronous transfers at a theoretical maximum of 10 MB/s, provides full Zorro III bus-master DMA, uses a 53C710 NCR SCSI Processor, and includes active SCSI-2 termination. Its firmware supports TD64/NSD64, allowing hard drives larger than 4GB to be used, and it supports CDROM booting plus an early-boot diagnostic menu. It is compatible with Fast SCSI-2 devices such as hard drives, CDROM drives, tape drives, and Iomega ZIP drives.
The project is explicitly fully open source. Hardware schematics, Gerbers, CPLD logic, firmware, AmigaOS drivers, test tools, debugging tools, manuals, and more are all available on GitHub. Support channels include Community Discord, GitHub issues, and email. The page FAQ gives fairly clear information on compatible machines, what is included in the box, firmware updates, order lookup, and related topics. It also states that a full-color printed manual is included with the board, so the documentation foundation appears solid.
The page shows that A4092 is available to order, but does not list a specific price, payment methods, or shipping regions. ReA4091 and ReA4091 Mini are shown as sold out. Each order corresponds to one board, and stock is limited. For users in China, the page does not provide information on access, payment, or logistics, so the actual purchasing experience cannot be assessed from the main text.
Its strengths are that it is thoroughly open source, modernized in design, firmware-upgradable without opening the Amiga, and offers relatively complete diagnostics and large-disk support. Its drawbacks are its extremely narrow target audience and the fact that full performance requires Super Buster Rev 11. A3000 systems with Super Buster 7 require a user-performed upgrade, while Buster 9 support is still experimental. It is best suited to Amiga retro-hardware enthusiasts, repair technicians, open-source hardware researchers, and A4000/A3000 users who need reliable SCSI-2 expansion. It is not suitable for general software development or modern server storage scenarios.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on scsi.me official site.
scsi.me is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 5.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach scsi.me directly.