M2488 PRODUCT GUIDE MAINTENANCE AND SERVICING
April 1997 CG00000-011503 REV. A 8-13
8-3.2.4 Format 2 and 3 Sense Information, Hardware Registers
Format 2 and 3 provides a listing of controller hardware registers. Bytes 22 and 23 of Format 2 and
Format 3 sense data, however, provide fault symptom codes.
Table 8-12. Format 02h Sense Information, SCSI Hardware Registers
BITS
BYTES 76543210
20-21 Companion chip’s interrupt request mask
22-23 Fault Symptom Code
SPC Registers (reference the SPC User Manual for a detailed description of these registers)
24 Secondary Interrupt Status (or FFh if none stacked)
25 Secondary Command Step (or FFh if none stacked)
26 SPC Command Register
27 Status (FFh = SPC registers not captured due to SPC being busy)
28 Nexus Status
29 Primary Interrupt Status
30 Primary Command Step
31 Data/MC Byte (MSB)
32 Data/MC Byte
33 Data/MC Byte (LSB)
34 SCSI Control Signal Status
35 Transfer Mode
36 Transfer Period
37 Transfer Offset
38 Modified Byte
39 Self ID Setting
40 Response Mode Setting
41 Select/Reselect Mode Setting
42 Parity Error Detection Setting
43 Interrupt Enable Setting