I’m very happy to be named an IBM Champion for the third year. Thank you ..read more

IBM Z Day is coming on October 18, don’t forget to register. IBM Z Day is a one day free and virtual conference. Join the more than 16,000 who have registered from more 120+ countries and 180+ speakers across five tracks. Gain insights into the tech that powers the world’s economy, advance your enterprise computing skills, and don’t forget to take part in the live chat where you can meet your peers and grow your network. The IBM Z Skills Acceleration track starts at 3 am ET and was built for global learners like you. Attend four unique sessions to earn an IBM Z Skills digital certificate ..read more

Register here for IBM Z Day. It’s a free online conference where you are sure to find something of interest. One hundred 180 speakers, five tracks, live demos and more. Register today ..read more

I am planning to teach on-line assembler classes for Marist College in the fall with their Institute for Data Center Professionals. You can find more information about this program and the classes here: https://idcp.marist.edu/enterprise-course-list Or for even more information, please contact the IDCP at learnzos@marist.edu Roberta Diggins l roberta.diggins@marist.edu l 845-575-3601 ..read more

The time for my favorite IBM mainframe conference is fast approaching – June 11-13, 2023. It’s the Marist College ECC Conference in Poughkeepsie, NY. Treat yourself to some fun and learn a lot about IBM mainframes as you are doing it. There is even an opportunity to give a presentation. Best of all, it’s free! Here is the link with all the details. I’m planning to attend. Hope to see you there ..read more

Learn or review instruction LOC today with some new notes that cover the basics, and a VisibleZ video that demonstrates the instruction in action. The notes include a list of suffixes that can be added to LOC to make coding the instruction easier. You can also find the new instructional materials on the IBM Mainframe Assembler tab ..read more

John Dravnieks kindly suggested adding ASI and AGSI to VisibleZ. David Staudacher suggested using LARL to load a base register in a few VisibleZ programs. Thanks to both of you for the great suggestions. You can watch ASI in action with LARL in the following video (and in the last table on the IBM Mainframe Assembler tab). The video illustrates adding a binary immediate constant to a binary fullword without using a register. AGSI, a sister instruction, works in a similar fashion on doubleword and can be viewed here and on the IBM Mainframe Assembler tab. I haven’t released the latest VisibleZ ..read more

I’m adding more short instruction videos that can be found on the IBM Mainframe Assembler tab (last table). Each video addresses a particular Add instruction using VisibleZ as a teaching tool. You don’t have to have VisibleZ installed to benefit from the videos. Today’s new videos are Add Fullword Immediate, Add Grande, and Add Grande Fullword. Review an instruction you already know, or learn a new one. Stay tuned, more videos are on the way ..read more

I was honored to be renewed in 2023 as an IBM Champion for Z. It is an honor I take seriously, and I hope to produce new posts, articles, and teaching videos all year long ..read more

My new assembler book is available in paperback now on Amazon. A hardback version will appear shortly. This is an introductory text. After chapters covering the z Series architecture, the book is organized into topics that are covered in an order that I worked out over 40 years of teaching assembler to students and professional programmers. Here are some of the chapter topics: Character Data Zoned Decimal and Packed Decimal Binary Data DSECTs Locate and Move Mode I/O Subprograms Bit processing Exotic Instructions Book Features: Each of the 12 Chapters begins with a newly written introductio ..read more