Month: October 2024

With hundreds of instructions to choose from, it never hurts to review one. Get my take on Add Grande (AG) with this write-up. You can watch a short video of this instruction in action here.

With hundreds of instructions to use, it never hurts to review one. Get my take on Add Fullword Immediate (AFI) with this write-up. You can watch a short video of this instruction in action here.

1. Find out the model z machine you are using.
2. Go here: https://www.ibm.com/docs/en/systems-hardware/zsystems
3. Click on your model.
4. Choose Related Publications twice.
5. Scroll to z/Architecture Principles of Operation
6. Bookmark it.

You will also get a link for the z/Architecture Reference Summary that contains all the machine instruction formats, a listing of all instructions by mnemonic, and all sorts of details about the machine architecture.