On Sunday, 08/20/2006 at 12:39 ZE2, Thomas Berg <[EMAIL PROTECTED]> wrote: > Interesting. I knew that VM had to use some special instructions but not much > more.
z/VM has the B2F0 instruction (IUCV/APPC) and z/VM-specific extensions to the DIAGNOSE instruction (e.g. diag 8 to issue a CP command). Everything else is virtualization or simulation of real z/Architecture and processor-specific facilities. Other than that, there are no "special instructions" in VM. CP uses the Interpretive Execution Facility (the SIE instruction) just like PR/SM does to create partitions - the hardware is sophisticated enough to allow both to run at the same time. And while PR/SM and CP share a common ancestor, the cybergenetic drift is such that they are no longer recognizably similar, having evolved to play very different roles in the arena of virtualization. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
