Block Move Instructions
5-11
a receive operation. This byte is combined with the first
byte from the subsequent transfer so that a wide transfer
can complete.
If the SATN/ signal is asserted by the initiator or a parity
error occurred during the transfer, it is possible to halt the
transfer and generate an interrupt. The Disable Halt on
Parity Error or ATN bit in the
register controls whether the LSI53C1000 halts on these
conditions immediately, or waits until completion of the
current Move.
Initiator Mode
The LSI53C1000 verifies that it is connected to the SCSI
bus as an initiator before executing this instruction.
The LSI53C1000 waits for an unserviced phase to occur.
An unserviced phase is defined as any phase (with
SREQ/ asserted) for which the LSI53C1000 has not yet
transferred data by responding with a SACK/.
The LSI53C1000 compares the SCSI phase bits in the
register with the latched SCSI
phase lines stored in the
register. These phase lines are latched when SREQ/ is
asserted.
If the SCSI phase bits match the value stored in the
register, the LSI53C1000 transfers
the number of bytes specified in the
register starting at the address pointed to by the
register. If the opcode bit is
cleared and a data transfer ends on an odd byte
boundary, the LSI53C1000 stores the last byte in the
register during a receive
operation, or in the
register during a send operation. This byte is combined
with the first byte from the subsequent transfer so that a
wide transfer can complete.
OPC
Instruction Defined
0
CHMOV/CHMOV64
1
MOVE/MOVE64
Содержание LSI53C1000
Страница 6: ...vi Preface...
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Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
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Страница 360: ...A 8 Register Summary...
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