LSI53C875 LSI Logic, LSI53C875 Datasheet - Page 211

• Manufacturer Part Number: LSI53C875
• Description: PCI to Ultra SCSI I/O Processor
• Manufacturer: LSI Logic

Figure 6.3
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DCMD Register
0 - Instruction Type - I/O
1 - Instruction Type - I/O
Opcode Bit 2
I/O Instruction Register
Opcode Bit 1
Opcode Bit 0
Relative Address Mode
I/O Instruction
Table Indirect Mode
Second 32-Bit Word of the I/O Instruction
Select with ATN/
Reserved
Reserved
Reserved
32-Bit Jump Address
DSPS Register
Reserved
Encoded Destination ID 3
Encoded Destination ID 2
Encoded Destination ID 1
Encoded Destination ID 0
DBC Register
R
Set/Clear Carry
R
Set/Clear Target Mode
R
Set/Clear ACK/
Set/Clear ATN/
R
6-15