IBM 3174 C 6.4 Microcode Disks?

Al, that was actually a quote from a message I wrote - I am the one with the 3274 floppies. Let me know what you are looking for. I am not at all familiar with what makes a "set", though I suppose I could just send the latest version I can find with each of the different sorts (SYST - which I took to be System, FEAT which I could to be Feature, and LANGUAGE that match your model. I found this in the IBM announcement letter: "One Feature Diskette and two System Diskettes are shipped with each 3274. For Models 31A, 31C, 31D, or 51C that are upgraded to Configuration Support D, a Language Diskette is also shipped. " If your 3274 does not have configuration support D, these might not work? Or maybe it was just a matter of needing to install the right Configuration support for the attached devices? I dunno (shrugs shoulders). Looking at the manuals on bitsavers, none of them mention this higher level of configuration support. I did find mention of it in an IBM announcement letter online, at https://www.argecy.com/3274 And it says this: "Configuration Support D (#9124): (Models 31A, 31C, 31D, 51C) Provides support for all 3270 functions included in Configuration Support C plus support for:" And "Configuration Support: The Configuration support required for the 3274 must be determined before ordering special features or attaching certain terminals. Refer to the 3274 Control Storage Requirements Tables under "Special Feature" Extended Function Store (EFS) for a detailed listing of the functions supports by each option. Field Installation: Yes. (Configuration Support D #9124 is field installation only for Models 31A, 31C, and 31D.) Customer Setup: Yes. Limitations: Certain functions require host software support in order to be utilized. Refer to host programming support descriptions to determine the levels of software required." So, unless yours is a 31A, 31C, 31D or 51C maybe these won't work? Let me know. JRJ On 2/20/2019 12:42 PM, Al Kossow via cctalk wrote: