LSI LSI53C1000, Technical Manual

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5-36 SCSI SCRIPTS Instruction Set
The SCSI First Byte Received (SFBR) is not writable using the CPU, and
therefore not by a Memory Move. However, it can be loaded using
SCRIPTS Read/Write operations. To load the SFBR with a byte stored
in system memory, first move the byte to an intermediate LSI53C1000
register (for example, a SCRATCH register), and then to the
SCSI First
Byte Received (SFBR) .
The same address alignment restrictions apply to register access
operations as to normal memory-to-memory transfers.
5.6.2 Second Dword
This section describes the second Dword of the Memory Move
Instruction register.
Figure 5.13 Memory Move Instructions - Second Dword
-
DSPS Register [31:0]
These bits contain the source address of the Memory
Move.
If the source address is in the 64-bit address space, the
bits will be contained in the
Memory Move Read Selector
(MMRS) register.
5.6.3 Third Dword
This section describes the third Dword of the Memory Move Instruction
register.
31 24 23 16 15 8 7 0
DSPS Register
31 24 23 16 15 8 7 0
MMRS Register