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2.2.2 System control coprocessor (CP0) registers
The R3900 Processor Core can be connected to as many as three coprocessors, referred to as CP1,
CP2 and CP3. The R3900 also has built-in system control coprocessor (CP0) functions for exception
handling and for configuring the system. Figure 2-3 shows the functional breakdown of the CP0
registers.
Figure 2-3 CP0 registers
EPC register
BadVAddr register
Status register
Debug register
†
Cache register
†
Config register
†
<Debugging>
<Exception Processing>
†
Additional R3900 Processor Core
registers not present in the
R3000A
PRld register
Cause register
DEPC register
†