Index Scanned	1981	Transcript
The Fourth Stage in Microprocessor Development A 32-Bit Microprocessor HEWLETT-PACKARD
This IC and one by Bell Labs were the first single-chip 32-bit microprocessors. The dense grid on the right is a ROM capable of storing 9.2K words, each 38 bits ling; the less dense grid on the opposite side is a register. The square grid directly beneath the register is the arithmetic and logic unit, or ALU, the device that performs the computations. The irregular circuits in the center of the chip make up the programmed logic array, or PLA, the component that decodes the instructions stored in ROM and controls the chip. The rectangular features on the chip's perimeter are test devices, spatial resolution patterns, and fabrication alignment marks. Actual size: 0.250 x 0.253 inches.

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