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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