Scsi Functional Description - LSI LSI53C875A Technical Manual

2.1.3.6 Memory-to-Memory Moves

2.2 SCSI Functional Description

2-16
Write Example 3 –
Burst = 16 Dwords, Cache Line Size = 8 Dwords:
A to B: MW (6 bytes)
A to C: MW (13 bytes)
A to D: MW (17 bytes)
C to D: MW (5 bytes)
C to E: MW (21 bytes)
D to F: MW (32 bytes)
A to H: MW (15 bytes)
MWI (64 bytes)
MW (2 bytes)
A to G: MW (15 bytes)
MWI (32 bytes)
MW (18 bytes)
Memory-to-Memory Moves also support PCI cache commands, as
described above, with one limitation. Memory Write and Invalidate on
Memory-to-Memory Move writes are only supported if the source and
destination address are quad word aligned. If the source and destination
are not quad word aligned (that is, Source address [2:0] == Destination
Address [2:0]), write aligning is not performed and Memory Write and
Invalidate commands are not issued. The LSI53C875A is little endian
only.
The LSI53C875A provides an Ultra SCSI controller that supports an
8-bit or 16-bit bus. The controller supports Wide Ultra SCSI synchronous
transfer rates up to 40 Mbytes/s. The SCSI core can be programmed with
SCSI SCRIPTS, making it easy to "fine tune" the system for specific
mass storage devices or Ultra SCSI requirements.
The LSI53C875A offers low level register access or a high-level control
interface. Like first generation SCSI devices, the LSI53C875A is
Functional Description