5-4
SCSI Controller
NCR53C9X SCSI Controller
Command Register Value
Command
Interrupt
7
6
5
4
3
2
1
0
Immediate Commands
X
0
0
0
0
0
0
0
No operation
NO
X
0
0
0
0
0
0
1
Flush FIFO
NO
X
0
0
0
0
0
1
0
Reset 53C90A device
NO
X
0
0
0
0
0
1
1
Reset SCSI bus
NO
Disconnect Commands
X
1
0
0
0
0
0
0
Reselect Sequence
YES
X
1
0
0
0
0
0
1
Select without ATN sequence
YES
X
1
0
0
0
0
1
0
Select with ATN sequence
YES
X
1
0
0
0
0
1
1
Select with ATN and stop sequence
YES
X
1
0
0
0
1
0
0
Enable Selection / Reselection
NO
X
1
0
0
0
1
0
1
Disable Selection / Reselection
YES
X
1
0
0
0
1
1
0
Select with ATN3
YES
X
1
0
0
0
1
1
1
Reselect Sequence
YES
Target Mode Commands
X
0
1
0
0
0
0
0
Send message
YES
X
0
1
0
0
0
0
1
Send status
YES
X
0
1
0
0
0
1
0
Send data
YES
X
0
1
0
0
0
1
1
Disconnect sequence
YES
X
0
1
0
0
1
0
0
Terminate sequence
YES
X
0
1
0
0
1
0
1
Target command complete sequence
YES
X
0
1
0
0
1
1
1
Disconnect
NO
X
0
1
0
1
0
0
0
Receive message sequence
YES
X
0
1
0
1
0
0
1
Receive command sequence
YES
X
0
1
0
1
0
1
0
Receive data
YES
X
0
1
0
1
0
1
1
Receive command sequence
YES
X
0
1
0
1
1
0
0
Target Abort DMA
NO
Initiator Mode Commands
X
0
0
1
0
0
0
0
Transfer information
YES
X
0
0
1
0
0
0
1
Initiator command complete sequence
YES
X
0
0
1
0
0
1
0
Accept message
YES
X
0
0
1
1
0
0
0
Transfer pad
YES
X
0
0
1
1
0
1
0
Set ATN
NO
X
0
0
1
1
0
1
1
Reset ATN
NO
Table 5-2 FSC Commands
S3GX_TRMBook Page 4 Friday, September 19, 1997 11:39 am
Summary of Contents for SPARCbook 3 series
Page 8: ...viii S3GX_TRMBook Page viii Friday September 19 1997 11 39 am...
Page 44: ...2 16 The SPARC CPU SBus Controller S3GX_TRMBook Page 16 Friday September 19 1997 11 39 am...
Page 76: ...5 8 SCSI Controller DMA Support S3GX_TRMBook Page 8 Friday September 19 1997 11 39 am...
Page 146: ...9 28 MODEM Class 2 Fax Command Set S3GX_TRMBook Page 28 Friday September 19 1997 11 39 am...
Page 180: ...11 30 Display Interface RAMDAC S3GX_TRMBook Page 30 Friday September 19 1997 11 39 am...
Page 216: ...Index vi S3GX_TRMBook Page vi Friday September 19 1997 11 39 am...