Yes, and IBM has current documentation if you need to that has been updated in 2026: https://www.ibm.com/docs/en/zos/3.2.0?topic=considerations-using-card-reade

Yes, and IBM has current documentation if you need to that has been updated in 2026: https://www.ibm.com/docs/en/zos/3.2.0?topic=considerations-using-card-reader-punch https://www.ibm.com/docs/en/zos/3.2.0?topic=considerations-u... It's generally and simply an encoding of what amounts to binary machine code which you translate via assembly code acting as a deterministic compiler from assembly to machine code if you are doing it manually. LLMs aren't a deterministic process and human languages aren't as clear as machine code and assembly.