Abstract
This chapter provides an overview of OpenVMS alpha. The chapter presents a design that provides a hardware implementation independent interface between OpenVMS and the hardware. The design provides the needed abstractions to minimize the impact between OpenVMS and the different hardware implementations. Finally, the design must contain only that overhead necessary to satisfy those requirements, while still supporting high-performance systems. The Processor Status (PS) is a special register that contains the current status of the processor. Integer register R30 is the Stack Pointer (SP). The SP contains the address of the top of the stack in the current mode. Certain PALcode instructions, such as CALL_PAL REI, use R30 as an implicit operand.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
