5-20
SCSI SCRIPTS Instruction Set
Relative
Uses the device ID in the instruction, but treats the
alternate address as a relative jump.
Table Relative
Treats the alternate jump address as a relative jump and
fetches the device ID, synchronous offset, and
synchronous period indirectly. The value in bits [23:0] of
the first four bytes of the SCRIPTS instruction is added
to the data structure base address to form the fetch
address.
Sel
Select with ATN/
24
This bit specifies whether SATN/ is asserted during the
selection phase when the LSI53C1000 is executing a
Select instruction. When operating in the initiator mode,
set this bit for the Select instruction. If this bit is set on
any other I/O instruction, an illegal instruction interrupt is
generated.
R
Reserved
[23:20]
ENDID[3:0]
Encoded SCSI Destination ID
[19:16]
This 4-bit field specifies the destination SCSI ID for an I/O
instruction.
Command
Table Offset
Absolute Alternate Address
Command
ID
Not Used
Not Used
Absolute Jump Offset
Command
Table Offset
Absolute Jump Offset
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...