Avago Technologies LSI53C1000R - Manual (Page 189)

SCSI Registers 4-77
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
Register: 0x44
Reserved
This register is reserved.
Register: 0x45
SCSI Wide Residue (SWIDE)
Read/Write
SWIDE SCSI Wide Residue [7:0]
After a wide SCSI data receive operation, this register
contains a residual data byte if the last byte received was
never sent across the DMA bus. It represents either the
first data byte of a subsequent data transfer, a residue byte
which should be cleared when an Ignore Wide Residue
message is received, or an overrun data byte. The
power-up value of this register is indeterminate.
Register: 0x46
Reserved
This register is reserved.
7 0
R
x x x x x x x x
7 0
SWIDE
0 0 0 0 0 0 0 0
7 0
R
x x x x x x x x