Format of SCSI Request Block (64 bytes) |
| Offset | Size | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
00h |
BYTE |
request number (see #01453) | |||||||||
|
01h |
BYTE |
request status (see #01455) | |||||||||
|
02h |
BYTE |
host adapter ID | |||||||||
|
03h |
BYTE |
request flags (see #01456) | |||||||||
|
04h |
DWORD |
reserved (0) | |||||||||
|
---request 00h--- |
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|
08h |
BYTE |
(ret) number of host adapters | |||||||||
|
09h |
BYTE |
(ret) target adapter ID | |||||||||
|
0Ah |
16 BYTEs |
(ret) SCSI manager ID | |||||||||
|
1Ah |
16 BYTEs |
(ret) host adapter ID | |||||||||
|
2Ah |
16 BYTEs |
(ret) host adapter-unique parameters (see #90010,#90011) | |||||||||
|
---extended request 00h--- |
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|
04h |
2 BYTEs |
(call) extended request signature 55h AAh (ret) if extended request supported, reply AAh 55h |
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|
06h |
WORD |
(call) length of extended buffer at offset 3Ah (ret) number of bytes returned in extended buffer |
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|
08h |
BYTE |
(ret) number of host adapters | |||||||||
|
09h |
BYTE |
(ret) target adapter ID | |||||||||
|
0Ah |
16 BYTEs |
(ret) SCSI manager ID | |||||||||
|
1Ah |
16 BYTEs |
(ret) host adapter ID | |||||||||
|
2Ah |
16 BYTEs |
(ret) host adapter-unique parameters | |||||||||
|
3Ah |
N BYTEs |
extended buffer
|
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|
---request 01h--- |
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|
08h |
BYTE |
target ID | |||||||||
|
09h |
BYTE |
logical unit number | |||||||||
|
0Ah |
BYTE |
(ret) device type (see #01460) | |||||||||
|
---request 02h--- |
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|
08h |
BYTE |
target ID | |||||||||
|
09h |
BYTE |
logical unit number | |||||||||
|
0Ah |
DWORD |
data allocation length (ret) residual byte length (if supported and requested) |
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|
0Eh |
BYTE |
sense allocation length | |||||||||
|
0Fh |
DWORD |
data buffer pointer | |||||||||
|
13h |
DWORD |
next request pointer (for linking) | |||||||||
|
17h |
BYTE |
CDB length | |||||||||
|
18h |
BYTE |
(ret) host adapter status (see #01454) | |||||||||
|
19h |
BYTE |
(ret) target status (see #01459) | |||||||||
|
1Ah |
DWORD |
post routine address (see #01466) | |||||||||
|
1Eh |
WORD |
real mode Post DS | |||||||||
|
20h |
DWORD |
SRB pointer | |||||||||
|
24h |
WORD |
reserved | |||||||||
|
26h |
DWORD |
SRB physical address | |||||||||
|
2Ah |
22 BYTEs |
SCSIMGR$ workspace | |||||||||
|
40h |
N BYTEs |
CCB, including sense data (20-24 bytes) | |||||||||
|
---request 03h--- |
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|
08h |
DWORD |
address of SRB to abort | |||||||||
|
---request 04h--- |
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|
08h |
BYTE |
target ID | |||||||||
|
09h |
BYTE |
logical unit number | |||||||||
|
0Ah |
14 BYTEs |
reserved | |||||||||
|
18h |
BYTE |
(ret) host adapter status (see #01458) | |||||||||
|
19h |
BYTE |
(ret) target status (see #01459) | |||||||||
|
1Ah |
DWORD |
post routine address | |||||||||
|
1Eh |
34 BYTEs |
workspace | |||||||||
|
---request 05h--- |
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|
08h |
16 BYTEs |
host adapter-unique parameters | |||||||||
|
---request 06h--- |
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|
08h |
BYTE |
target ID | |||||||||
|
09h |
BYTE |
logical unit number | |||||||||
|
0Ah |
BYTE |
disk drive flags (see #01461) | |||||||||
|
0Bh |
BYTE |
INT 13h drive number | |||||||||
|
0Ch |
BYTE |
preferred head number translation | |||||||||
|
0Dh |
BYTE |
preferred sector size translation | |||||||||
|
0Eh |
10 BYTEs |
reserved | |||||||||
|
---request 7Fh--- |
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|
08h |
WORD |
base I/O port address | |||||||||
|
0Ah |
BYTE |
number of I/O ports used | |||||||||
|
0Bh |
BYTE |
??? (01h returned for AHA-152x) | |||||||||
|
0Ch |
BYTE |
interrupt level | |||||||||
|
0Dh |
BYTE |
DMA channel | |||||||||
|
0Eh |
BYTE |
(ASPI7DOS.SYS) EISA slot number (ASPI8DOS.SYS) PCI device number |
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|
0Fh |
BYTE |
|
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|
10h |
DWORD |
ASPI entry point address | |||||||||
|
14h |
DWORD |
previous ASPI entry point address | |||||||||
|
18h |
WORD |
offset to "ASPI request dispatcher" procedure | |||||||||
|
1Ah |
WORD |
offset to "interrupt handler" procedure | |||||||||
|
1Ch |
WORD |
offset to some procedure | |||||||||
|
1Eh |
WORD |
offset to some procedure | |||||||||
|
20h |
WORD |
offset to host adapter data | |||||||||
|
22h |
BYTE |
??? (apparently always 02h) | |||||||||
|
23h |
BYTE |
reserved??? (0) | |||||||||
|
24h |
BYTE |
(ASPI8DOS.SYS) PCI bus number? | |||||||||
|
25h |
11 BYTEs |
reserved??? (0) | |||||||||
|
See Also: |