Seven years ago this week HP's 3000 lab engineers announced that networked printing was ready for beta testing. This was one of the last enhancements first demanded by a wide swath of the 3000 community, then delivered by HP. The venerable Systems Improvement Ballot of 2004 ranked networked printing No. 1 among users' needs.
MPEMXU1A is the patch that enables networked printing, pushed into General Release in Fall, 2005. HP had given the community a OS-level substitute for good third party software from RAC Consulting. It might have been the last time that an independent software tool got nudged away by HP development.
The HP 3000 has the ability to send jobs to non-HP printers over a standard network as a result of the enhancement. The RAC third party package ties printers to 3000 with fewer blind spots than the MPEMXU1A patch. HP's offering won't let Windows-hosted printers participate in the 3000 network printing enhancement. There's a Windows-only, server-based net printing driver by now, of course. The HP Universal Print Driver Series for Windows embraces Windows Server 2008 and 2003.
Networked printing for MPE/iX had the last classic life that we can recall for a 3000 enhancement. The engineering was ready to test less than a year after the request. This software moved out of beta test by November, a relatively brief 5-month jaunt to general release. If you're homesteading on 3000s, and you don't need PCL sequences at the beginning and end of a spool file, you should use it. Commemorate the era when the system's creator was at least building best-effort improvements.