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[#769] Fix msp430 entering/exiting Interrupt handlers #139

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[#769] Fix msp430 entering/exiting Interrupt handlers #139

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@peroxyacyl peroxyacyl commented Mar 18, 2025 •
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This PR fixes renode/renode#769

Description

To support 20-bit extension of PC, MSP430X does following:

  • When entering the interrupt handlers, it pushes the higher 4bits of SP with SR contents.
  • When exiting the interrupt handlers, it pops two words for the SR (12bits) and PC(20bits)

The current implementation loses the higher 4bits in PC of the original context.
Screenshot 2025-03-18 at 12 03 36

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MSP430X: Issues on Entering/Exiting Interrupt handlers
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