EWS-UX


EWS-UX is a Unix operating system used by NEC Corporation for its EWS-4800 line of engineering workstations. EWS-UX is based largely on versions of Unix System V supplemented with BSD software. It was widely used from the late 1980s to around 2000.

Overview

EWS-UX and the EWS-4800 line of workstations were widely used for CAD / CAM work.
Early versions of EWS-UX run on Motorola 68000 series CISC processors, while later versions run on MIPS RISC processors.
NEC attempted to introduce binary compatibility between Unix versions used by DEC, Sony, and Sumitomo's Unix. However, DEC dropped out of the agreement to pursue the DEC Alpha architecture.
EWS-UX and UP-UX became integrated and merged into UX/4800.

Versions

  1. EWS-UX / V: Based on Unix SVR2. It runs on the EWS4800 series equipped with the MC68020, MC68030, and MC68040 processors.
  2. EWS-UX / V : Based on Unix SVR4. It runs on the EWS4800 series equipped with R3000 and R4000 processors.
  3. EWS-UX / V : Based on Unix SVR4.2. It supports processors such as the R4400, VR4200, and R4600.
  4. EWS-UX / V : Based on Unix SVR4.2MP. It supports multi-processor systems using the R4400MC. It is mostly similar to UP-UX, NEC's Unix operating system for servers.