Nios® II Software Developer Handbook

ID 683525
Date 8/28/2023
Public
Document Table of Contents

9.2.2. HAL ISR Restrictions

When your system has an EIC, the HAL interrupt support imposes the following restrictions:
  • Nonmaskable hardware interrupts must use a shadow register set.
  • Nonmaskable hardware interrupts cannot share a register set with a maskable hardware interrupt.