I worked with an IBM 360/65 that had one MB of IBM LCS and later 2 MB of LCS from some other OEM when I was a student. This 360/65 had 3 frames of main storage, each with 256 KB of storage. The way I remember it, we could ask for more LCS than main, but it was much slower. You could specify that data in COMMON as well as data buffers reside in the LCS under OS MVT. The LCS slowdown was noticable because the CPU had to wait longer for all data coming in/out of LCS and, of course, the CPU time was still ticking. I don't know if it slowed down channel access much.
Ben Alford Enterprise Systems Programming University of Tennessee ---------------------------------------------------------------------- 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
