On Thu, 17 Dec 2009 16:27:10 -0500, Mike Myers wrote: > >Yes, I had forgotten about SIO/HIO/TIO and was reminded of those by your >first post. I can't recall if I ever personally wrote a SIO instruction. >Most of the channel programming I ever did was at the EXCP level, so i >don't recall writing a SSCH instruction either.
SIO was a privileged instruction, so you wouldn't have done that unless you were running in supervisor state. Same with SSCH. >As for the ISAM compatibility interface in VSAM, I think that went out >around the same time as ICF catalogs came along. No. Not even close. IIRC, you could even use actual ISAM until 2000. ICF catalogs were out long before 1990. Support for ISAM applications is still in VSAM. I've never heard any statement that it will be withdrawn. -- Tom Marchant ---------------------------------------------------------------------- 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
