MicroVAX 78032

The MicroVAX 78032 (otherwise known as the DC333) is a microprocessor developed and fabricated by Digital Equipment Corporation (DEC) that implements a subset of the VAX instruction set architecture (ISA).

The 78032 is used exclusively in DEC's VAX-based systems, starting with the MicroVAX II in 1985.

When clocked at a frequency of 5 MHz, the 78032's integer performance is comparable to the original VAX-11/780 of 1977.

The MicroVAX 78032 contains 125,000 transistors on an 8.7 by 8.6 mm (74.82 mm2) die that was fabricated in DEC's ZMOS process, a 3.0 µm NMOS logic process with two layers of aluminum interconnect.

[2] An identical, reverse engineered copy of the 78032 was manufactured 1989/90 in East Germany as the U80701.

CPU 78032 (top) and FPU 78132
DEC MicroVAX 78032 CPU die shot
DEC MicroVAX 78132 FPU die shot
The rare U80701 was the first 32-Bit microprocessor manufactured in the GDR and is pin-compatible to DEC 78032.