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Ferranti produced perhaps the first gate-array, the ULA (Uncommitted Logic Array), around 1980.
Ferranti Electronics Ltd of Chadderton, Oldham, Greater Manchester for uncommitted logic arrays for microelectronics applications.
In many ways a cut-down BBC Micro, it used one Acorn-designed uncommitted logic array (ULA) to reproduce most of the functionality.
In the early eighties, Ferranti produced some of the first large uncommitted logic arrays (ULAs), used in home computers such as the Sinclair ZX81, Sinclair ZX Spectrum, Acorn Electron and BBC Microcomputer.
The Jupiter ACE was new to the market and the designers couldn't afford to use an uncommitted logic array (ULA), a design approach then gaining popularity in other computers (such as the ZX 81) to reduce component count, because these weren't economical in small quantities.
There are only three other chips on board: a 3.5 MHz Z80A 8-bit microprocessor from Nippon Electric (now NEC), an uncommitted logic array (ULA) chip from Ferranti and a 8 kB ROM providing a simple BASIC interpreter.
A gate array or uncommitted logic array (ULA) is an approach to the design and manufacture of application-specific integrated circuits (ASICs), using a prefabricated chip with active devices like AND-gates etc. that is later interconnected according to a custom order by adding metal layers in the factory environment.