I wpuld hope that a PTF order for a particular device would retrieve all needed parts for your software.
On Sat, Jan 17, 2026 at 7:41 PM Paul Feller <[email protected]> wrote: > > My guess would be one of the hurdles you have to overcome is having the > proper UIM for HCD to access. I recall years ago I had to have a USERMOD > to add a UIM to the NUCLEUS so HCD understood a device that was not by > default in the UIMs supplied by IBM. > > So, one thing you would need is a UIM of the needed device type(s). As was > already mentioned you can update the PROFILE information in HCD to point to > an alternate library that could contain the UIMs you need. > > After that I'm not sure what else you might need. > > > The following stuff is from the z/OS 3.1 Hardware Configuration Definition > User's Guide. Chapter 3, How to set up, customize and start HCD. > > UIM > UIMs (unit information modules) perform the device-dependent part of the > operating system > configuration definition. There is a UIM for each supported device or > device group. Each UIM > recognizes and processes the values coded for its device or device group. > HCD routines load all UIMs, > either IBM or customer supplied, into virtual storage and make calls to the > UIMs. > > UIM_LIBNAME > Specifies the name of the data set containing the UIMs, the associated > UDTs, and any help members > for the UIMs. If the keyword is omitted, SYS1.NUCLEUS is assumed (Note: > only UIMs residing in > SYS1.NUCLEUS are read during IPL!). > > When UIM_LIBNAME is specified, HCD does not implicitly access SYS1.NUCLEUS > for loading the > UIMs. > > If you specify an asterisk (*) as data set name, HCD assumes that the UIM > data set (including > SYS1.NUCLEUS) is part of the ISPF load library concatenation chain, > contained in the JOBLIB/ > STEPLIB concatenation chain, or specified in the active LNKLSTxx member. > > You can only define one data set with the UIM_LIBNAME statement. If you > want to specify several > data sets, specify an asterisk (*) as data set name and specify the data > sets in the JOBLIB/STEPLIB > concatenation chain. > > UIM_VOLSER > Specifies the volume serial number of the UIM library. Required only if the > data set is specified via > keyword UIM_LIBNAME and is uncataloged. > > > Paul > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On Behalf Of > Radoslaw Skorupka > Sent: Saturday, January 17, 2026 5:50 PM > To: [email protected] > Subject: Re: Older HCD version > > As far as I know it is possible to configure HCD to point to alternative > library instead of NUCLEUS. > However I don't think it is enough. > > -- > Radoslaw Skorupka > Lodz, Poland > > > > W dniu 16.01.2026 o 20:11, Mark Jacobs pisze: > > There are some HCD modules in the nucleus, so depending on what they > do/support you might not be able to run an older HCD on an uplevel system. > > > > Mark Jacobs > > > > Sent from ProtonMail, Swiss-based encrypted email. > > > > GPG Public Key > -https://api.protonmail.ch/pks/lookup?op=get&[email protected] > m > > > > > > On Friday, January 16th, 2026 at 1:03 PM, Radoslaw > Skorupka<[email protected] > <mailto:[email protected]> > wrote: > > > >> Is is somehow possible to run backlevel HCD on current system? > >> I mean current system, like z/OS 3.1 and HCD which is aware of machines > >> like z900 or even older ones. > >> I just wanted to check some definitions on the older hardware. > >> > >> -- > >> Radoslaw Skorupka > >> Lodz, Poland > >> > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] <mailto:[email protected]> > with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
