Avago Technologies LSI53C1010 - Manual (Page 109)

Instruction Descriptions 3-69
Field(s) This command has the following fields:
Description The initiator waits for a disconnect from the SCSI bus. A legal disconnect
is a loss of busy and select for the specified bus free time, following a
DISCONNECT message or a COMMAND COMPLETE message. If the
SCSI Disconnect Unexpected (SDU) bit (SCNTL2, bit 7) is cleared and
a disconnect occurs, the next SCSI SCRIPTS instruction is executed. If
the SDU bit is set and a disconnect occurs, an Unexpected Disconnect
interrupt occurs.
Legal Forms WAIT DISCONNECT
3.2.21 WAIT SELECT
WAIT SELECT {REL(Address) | Address}
Definition Wait for selection from initiator.
Operands This command has the following operands:
Figure 3.21 WAIT DISCONNECT Format
31 30 29 25 24 23 0
DCMD Register DBC Register
Instr Type Opcode R R
0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
31 0
DSPS Register
R
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Instruction
Type I/O.
Opcode Wait Disconnect.
REL Indicates the use of relative addressing.
Address A 32-bit address (or 24-bit offset) of the next instruction to fetch if
the chip is selected, or if the SIGP bit in the ISTAT register is set.