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==== SP ====
==== SP ====
This is a SPR (special purpose register) that holds the current stack pointer.
This is a SPR (special purpose register) that holds the current stack pointer. Only bits 0 to 15 are used.
==== PC ====
==== PC ====
This is a SPR (special purpose register) that holds the current program counter.
This is a SPR (special purpose register) that holds the current program counter. Only bits 0 to 15 are used.
==== IMB ====
==== IMB ====
! Description
! Description
|-
|-
| 0-15 || Exception PC
| 0-19 || Exception PC
|-
|-
| 20-23 || Exception cause
| 20-23 || Exception cause