This was more popular than the TI part but cost of making the metal mask limited its use. In 1973 introduced a mask-programmable device (DM7575) with 14 inputs and 8 outputs with no memory registers. GE obtained several early patents on programmable logic devices. The GE device was the first erasable PLD ever developed, predating the EPLD by over a decade. Intel had just introduced the floating-gate erasable PROM so the researcher at GE incorporated that technology. This experimental device improved on IBM's ROAM by allowing multilevel logic. In 1971, Company (GE) was developing a programmable logic device based on the new technology. The TMS2000 had up to 17 inputs and 18 outputs with 8 JK flip flop for memory. This device, the TMS2000, was programmed by altering the metal layer during the production of the IC. In 1970, developed a mask-programmable IC based on the read-only associative memory or ROAM. Early programmable logic In 1969, offered the XC157, a mask-programmed gate array with 12 gates and 30 uncommitted input/output pins.CMOS PLD Programming Hardware and Software Support datasheet, cross reference, circuit and application notes in pdf format.
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