Pathworks for DOS Memory Solutions for Client Administrators Aug91

This document, "PATHWORKS for DOS: Memory Solutions for Client Administrators," published by Digital Equipment Corporation in August 1991, serves as a guide for system administrators looking to optimize memory usage and enhance performance for personal computers (PCs) running PATHWORKS for DOS client software.

The guide addresses the challenges of memory limitations in the DOS environment (specifically the 640 KB conventional memory barrier) and provides solutions for various PC architectures prevalent at the time (8086/88, 80286, and 80386 processors).

Key areas covered include:

• Memory Concepts: A foundational understanding of PC memory types, including conventional, upper, extended (XMS), and expanded (EMS) memory, along with related specifications and terminology (e.g., High Memory Area, Upper Memory Blocks).
• PATHWORKS Memory Footprint: Detailed analysis of how various PATHWORKS components (such as DECnet and TCP/IP protocols, drivers, network controllers, and user applications like PC DECwindows Motif) consume memory.
• Client Configuration Procedures: Step-by-step instructions and recommendations for configuring clients to conserve conventional memory. This includes leveraging extended and expanded memory through utilities like HIMEM.SYS and third-party 80386 memory managers (e.g., QEMM-386) to load programs and drivers into higher memory areas.
• System and Network File Tuning: Guidance on editing critical DOS configuration files (CONFIG.SYS, AUTOEXEC.BAT) and network-specific files (STARTNET.BAT, PROTOCOL.INI) to adjust memory allocation and performance parameters. Specific considerations for integrating with Microsoft Windows and DOS Version 5.0 are also provided.
• Memory Management Tools: How to use PATHWORKS utilities like Memman to analyze current memory configurations and EMSSPEED to evaluate expanded memory performance.
• Dynamic Component Unloading: Procedures and utilities (STOPNET.BAT, TCPUNLD.EXE) for unloading PATHWORKS components to free up memory for other DOS applications, including the creation of custom batch files for loading and unloading.
• Configuration Examples: Extensive practical examples illustrating optimized client configurations across different processor types and various scenarios (e.g., base setups, remote boot, enhanced redirectors, and specific network controllers), complete with memory maps and configuration notes.

In essence, the document provides comprehensive technical details and practical methods for system administrators to efficiently manage and allocate memory resources for PATHWORKS for DOS clients in network environments of the early 1990s.