Block Move Instructions
5-13
register is incremented by the number of bytes
transferred. This process is repeated until the DBC
register is decremented to zero. At this time, the
LSI53C1000 fetches the next instruction.
If bit 28 is set, indicating table indirect addressing, this
field is not used. The byte count is instead fetched from
a table pointed to by the
register.
5.2.2 Second Dword
This section describes the structure of the second SCSI SCRIPTS block
move instruction Dword.
Figure 5.3
Block Move Instruction - Second Dword
Start Address
[31:0]
This 32-bit field specifies the starting address of the data
to move to/from memory. This field is copied to the
register. When the LSI53C1000
transfers data to or from memory, the DNAD register is
incremented by the number of bytes transferred.
When bit 29 is set, indicating indirect addressing, this
address is a pointer to an address in memory that points
to the data location. When bit 28 is set, indicating table
indirect addressing, the value in this field is an offset into
a table pointed to by the
The table entry contains byte count and address
information.
31
24 23
16 15
8
7
0
DSPS Register
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...