Avago Technologies LSI53C1000R - Manual (Page 278)

5-36 SCSI SCRIPTS Instruction Set
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
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 LSI53C1000R
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
are contained in the
Memory Move Read Selector (MMRS)
register.
31 0
DSPS Register
31 0
MMRS Register