Ed Gould wrote:
You bring up an interesting question (to me). I wonder if anyone did during the Y2K testing try a date later that 2042.
STCKE/ETOD etc. are architected to allow TOD clock values beyond 2042. But, the TOD clock itself has not yet been extended on the left. Bit position 51 is still incremented every microsecond. See "Timing" -> "Time-of-Day Clock" -> "Format" in POP:
[IBM Documentation] The TOD clock is a 104-bit register. It is a binary counter with the format shown in the following illustration. [nice picture snipped out for text-based post] The TOD clock nominally is incremented by adding a one in bit position 51 every microsecond. In models having a higher or lower resolution, a different bit position is incremented at such a frequency that the rate of advancing the clock is the same as if a one were added in bit position 51 every microsecond. The resolution of the TOD clock is such that the incrementing rate is comparable to the instruction-execution rate of the model. [/IBM Documentation] -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.com/ ---------------------------------------------------------------------- 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
