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SCSI Status Lines
Nine status lines are defined by the SCSI Standard X3T9.2/86-109
Revision 2:
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I/O;
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C/D;
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MESSAGE;
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BUSY;
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SELECT;
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REQUEST;
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ACKNOWLEDGE;
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ATTENTION; and
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RESET.
There are also nine phases defined by the SCSI standard. These are not
timing phases, but conditions of the bus action. They are:
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ARBITRATION;
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SELECT;
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RESELECT;
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DATA OUT;
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DATA IN;
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COMMAND;
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STATUS;
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MESSAGE OUT; and
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MESSAGE IN.
SCSI Overview
B-2
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