In a message dated 10/5/2007 4:43:46 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: >initially running on 360/67 machines. it had hack on the side to create a single 16mbyte virtual address space and some simple interrupt handler for page faults. it also had CCWTRANS (and associated routines) from cp67 wired into the side to handle the application channel programs (from excp/svc0) to "real" channel program translation. This has always intrigued me. What was done to eliminate the possibility that the channel had to access a virtual page that had been paged out? An enabled application or system code that is copying and translating virtual-to-real addresses can always suffer a page fault, wait for the page-in, and resume as if nothing had happened, but channels cannot wait for page-fault resolution. Or could they? Bill Fairchild Plainfield, IL
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