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TheGeneric Array Logic (also known asGAL and sometimes as gate array logic[1]) device was an innovation of thePAL and was invented byLattice Semiconductor. The GAL was an improvement on the PAL because one device type was able to take the place of many PAL device types or could even have functionality not covered by the original range of PAL devices. Its primary benefit, however, was that it was erasable and re-programmable, makingprototyping and design changes easier for engineers.
A similar device called a PEEL (programmable electrically erasable logic) was introduced by theInternational CMOS Technology (ICT) corporation.
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