> Data chaining was the original solution to this problem.
It was probably a bad idea to mention I/O in my post (I know about data chainging and IDAW). I was thinking more about the possible need to have more than 4k of contiguous real storage. Like Tony mentioned, new interfaces such as SMC-R/D might need this. There might be internal interfaces for this, right. It just triggered my curiosity. But the net seems to be, my assumption is wrong. If an area >4k is PGFIXed, then I need to find the real address of every page and cannot assume the real storage is contiguous. -- Peter Hunkeler ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
