Read to get system status.
| SW0 | Software Interrupt Flag |
| SW1 | Software Interrupt Flag |
| SW2 | Software Interrupt Flag |
| SW3 | Software Interrupt Flag |
| FPIOC | FPU Invalid Operation interrupt flag |
| FPDZC | FPU Divide by zero interrupt flag |
| FPUFC | FPU Underflow interrupt flag |
| FPOFC | FPU Overflow interrupt flag |
| FPIDC | FPU Input denormal interrupt flag |
| FPIXC | FPU Inexact interrupt flag |
| SEQRAMERR1B | SEQRAM Error 1-bit Interrupt Flag |
| SEQRAMERR2B | SEQRAM Error 2-bit Interrupt Flag |
| FRCRAMERR1B | FRCRAM Error 1-bit Interrupt Flag |
| FRCRAMERR2B | FRCRAM Error 2-bit Interrupt Flag |