There is an IOS data structure called the VOID (Vector Of IO Drivers) which, in my opinion anyway, is the definitive reference. Unfortunately, it looks to be OCO now.
At one time, I had a desire to use a SSCH Exit, whose address is defined in the VOID entry for each driver. I had asked IBM to consider a new service to dynamically define an I/O Driver (so that I could define my own SSCH Exit) but there was no other demand for it at the time. I seem to remember someone bringing up the subject again more recently, but I'm not sure if anything was ever actually done. The other nice thing about such a service would be the assignment of a unique(?) driver ID, rather than having several drivers in the system all running under the "Miscellaneous" driver ID. At 12:55 PM 12/17/2007, Bill Fairchild wrote: > > >In a message dated 12/17/2007 11:41:57 A.M. Central Standard Time, >[EMAIL PROTECTED] writes: > >I don't remember whether EXCPVR has a unique Driver ID. I seem to recall >that most of the access methods were grouped under one ID, except for VSAM. >It's been a while since I looked (at the VOID), but in the case of VSAM, I >thin >k there is (was?) both a VSAM driver, and a separate Media Manager driver. > > > >The IBM DSECT that maps the IOSB is IECDIOSB. EXCPVR is not defined as a >driver id in this DSECT. VSAM is. Media Manager uses the VSAM Driver ID in >its IOSBs. Or I should say it did in 1990 when I studied all the M/M >microfiche. > ================================================== Art Celestini Celestini Development Services Phone: 201-670-1674 Wyckoff, NJ ============= http://celestini.com ============= Mail sent to the "From" address used in this post will be rejected by our server. Please send off- list email to: ibmmain<at-sign>celestini<dot>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
