Registers: 0xd0–0xd3 – LSI 53C875A User Manual
Page 198
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Registers
In the case of a SCSI data receive, if there is a byte in
the
register then this
address will point to the location where that byte must be
stored. The SWIDE byte must be manually written to
memory and this address must be incremented prior to
updating any scatter/gather entry.
In the case of a SCSI data receive, if there is not a byte
in the SWIDE register then this address will be the next
location that should be written to when this I/O restarts.
No manual flushing will be necessary.
In the case of a SCSI data send, all data sent to the SCSI
bus will be accounted for and any data left in the part will
be ignored and will be automatically cleared from the
FIFOs.
Registers: 0xD0–0xD3
Entry Storage Address (ESA)
Read/Write
This register's value depends on the type of BMOV being executed. The
three types of BMOVs are listed below.
ESA
Entry Storage Address
[31:0]
This register's value depends on the type of BMOV being
executed. The three types of BMOVs are listed below.
31
0
ESA
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
Direct BMOV:
In the case of a direct BMOV, this register will contain
the address the BMOV was fetched from when the
phase mismatch occurred.
Indirect BMOV:
In the case of an indirect BMOV, this register will
contain the address the BMOV was fetched from when
the phase mismatch occurred.
Table Indirect BMOV:
In the case of a table indirect BMOV, this register will
contain the address of the table indirect entry being
used when the phase mismatch occurred.