DECstation 5000 Model 240 Workstation

This document provides a comprehensive technical overview of the DECstation 5000 Model 240 workstation, introduced in 1991. It covers the system's architecture, including the 40 MHz MIPS R3000A-based CPU, memory management, TURBOchannel I/O interconnect, and I/O subsystem. It details the system software environment, specifically the ULTRIX operating system, software development tools (including C++ and DEC FUSE), and graphical user interfaces like DECwindows. The guide also describes available TURBOchannel-based graphics options (MX, HX, TX, and the 3D-accelerated PXG family) and new multimedia hardware/software capabilities for audio and video integration.