LSI LSI53C896, Technical Manual

Page: 187 / 370

SCSI Registers 4-75
LSI53C700 family; selection/reselection IDs are stored in
both the
SCSI Selector ID (SSID) and SCSI First Byte
Received (SFBR) registers. This bit is not affected by a
software reset.
If the COM bit is cleared, do not access this register
using SCRIPTS operation as nondeterminate operations
may occur. (This includes SCRIPTS Read/Write
operations and conditional transfer control instructions
that initialize the
SCSI First Byte Received (SFBR)
register.)
When the COM bit is set, the ID is stored only in the
SCSI Selector ID (SSID) register, protecting the SCSI
First Byte Received (SFBR) from being overwritten if a
selection/reselection occurs during a DMA register-to-
register operation.
Registers: 0x3C–0x3F
Adder Sum Output (ADDER)
Read Only
ADDER Adder Sum Output [31:0]
This register contains the output of the internal adder,
and is used primarily for test purposes. The power-up
value for this register is indeterminate.
31 0
ADDER
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
*