On Fri, 9 Nov 2007 08:10:31 -0600, Mohammad Khan <[EMAIL PROTECTED]> wrote:
>As for the need of a "guaranteed bad address", is it something similar to a >NULL pointer in C ? If I recall correctly, C implemets NULL pointers as X'0' >which off course would run into issues with PSA access here. By the way how >was this need satisfied in 24 bit days ? Or was it that the need hadn't arisen >yet ? There is nothing in the C language definition to suggest that zero is not a valid pointer value. In the 24-bit days, PL/I and TSO parse (IKJPARS) both used X'FF000000' as their "bad" or "end of chain" value, IIRC. Tony H. ---------------------------------------------------------------------- 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
