Service manual

Utilities 25
Table 3–5 (Cont.) PV_SCS_FMT_ERR# Error Codes
Error
Code Description of Code
6E Too many retries of this command, failed after bus_device_reset
70 Timeout waiting for bus free after command (req is set)
72 No interrupt request for the DMA_in phase
74 SCD_CNT not zero following DMA_in phase
76 No interrupt request for the DMA_out phase
78 SCD_CNT wrong following DMA_in phase
7A Phase did not change soon after data_xfer_in phase
7C Phase did not change soon after data_xfer_out phase
82 Parity error on SCSI bus
84 SCSI req was not set in time
86 SCSI req was not cleared in time
3.2 Special Diagnostic Key on Diskettes for
Customer Service System Exerciser
The diskette in the maintenance kit must have a special diagnostic code
written on it to allow the system exerciser to write on the diskette when
running in the customer service mode. Without this special key, such
as on normal customer diskettes, the system exerciser does not perform
write testing on the diskette. This safety feature prevents accidentally
destroying the customer’s programmed diskettes.