OpenVMS Alpha Guide to 64-Bit Addressing

This document provides a guide for system and application programmers on utilizing 64-bit virtual addressing support introduced in OpenVMS Alpha Version 7.0. It details the layout of the 64-bit virtual address space, enhancements to system services, RMS (Record Management Services) interface changes, and device driver support for 64-bit addresses. Additionally, the guide outlines programming guidelines for 64-bit APIs, support for 64-bit addressing in the DEC C Runtime Library, and specific macros provided for 64-bit addressing in MACRO-32. It also includes an example program demonstrating 64-bit region creation and deletion.