DEC DECstation 5000 Model 100 Series, Maintenance Manual

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Table F-1. FPU Error Codes
Error Code Meaning
1 Could not enable coprocessor 1 (CP1) in status register.
2 Could not write to CP1 register.
3 - 6 Patterns did not match.
7 Convert doubleword to word (CVT D. W. ) least significant
failed.
8 CVT D. W. most significant failed.
9 - 10 Double miscompare occurred.
11 Misconversion occurred.
12 FPU cache status register double error occurred.
13 -14 Single miscompare occurred.
15 Misconversion occurred.
16 FPU CSR single error occurred.
17 Single division failed.
18 Single multiplication failed.
19 Double multiplication failed.
20 Double divide failed.
21 Pattern readback did not match.
22 FPU interrupt was pending when it should not.
23 FPU did not trap on overflow exception (P1 = FCR31).
99 All tests passed.
Test Commands and Messages Produced by Version PDE3 ROM Chips F–3