2 second dword, 3 third dword, Second dword – Avago Technologies LSI53C1000R User Manual
Page 275: Third dword, Transfer control instructions – second dword, Transfer control instructions – third dword
Transfer Control Instructions
5-33
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
DC
Data Compare Value
[7:0]
This 8-bit field is the data compared against the
SCSI First Byte Received (SFBR)
register. These bits are
used in conjunction with the Data Compare Mask Field to
test for a particular data value. If the COM bit
(
, bit 0) is cleared, the value in the
SFBR register may not be stable. In this case, do not use
instructions using this data compare value.
5.5.2 Second Dword
This section describes the second Dword of the Transfer Control
Instruction register.
Figure 5.10 Transfer Control Instructions – Second Dword
Jump Address
[31:0]
This 32-bit field contains the address of the next
instruction to fetch when a jump is taken. When the
LSI53C1000R fetches the instruction from the address
pointed to by these 32 bits, this address is incremented
by 4, loaded into the
register, and becomes the current instruction pointer.
5.5.3 Third Dword
This section describes the third Dword of the Transfer Control Instruction
register.
Figure 5.11 Transfer Control Instructions – Third Dword
JUMP64 Address
[31:0]
This 32-bit field contains the upper Dword of a 64-bit
address of the next instruction to fetch when a JUMP64
is taken.
31
0
DSPS Register
31
0
SFS Register (Used for JUMP64 Instruction)