Original Design Documents for Sinclair ULA Surface After 45 Years

The design documents for the Ferranti ULA, a key component in Sinclair's 8-bit home computers, have been released after 45 years. The documents, which include printouts, engineering drawings, and handwritten design notes, cover various Sinclair products such as the ZX81 and Spectrum. They were purchased on eBay and have been made available with minimal changes, thanks to permission from Sky, the current holder of the IP.

What's in the Sinclair ULA Design Documents

• The documents cover the full range of Sinclair products, including the ZX81 and Spectrum
• They include folders with printouts, engineering drawings, and handwritten design notes
• The ULAs that haven’t been reverse engineered yet are of particular interest
• Subtle differences between different versions of the same ULA are also notable

Why it matters

The release of these documents provides valuable insight into the design and development of the Sinclair ULA, which played a crucial role in the success of Sinclair's 8-bit home computers. This can be useful for researchers, hobbyists, and enthusiasts of retro computing.