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III
BGND
Operation:
Assembler
Syntax:
Attributes:
Enter Background Mode
If (background mode enabled)
then enter Background Mode
else FormatNector offset
~
- (SSP)
PC~-(SSP)
SR
~-(SSP)
(Vector)
~
PC
BGND
Size
=
(Unsized)
BGND
Description:
The processor suspends instruction execution and enters background mode (if
enabled). The freeze output is asserted to acknowledge entrance into background mode. Upon
exiting background mode, instruction execution continues with the instruction pointed to by the
program counter.
If background mode is not enabled, the processor initiates illegal instruction exception
processing. The vector number is generated to reference the illegal instruction exception vector.
Background mode is covered in SECTION 7 DEVELOPMENT SUPPORT.
Condition Codes:
x
N
X
Not affected
N Not affected
Z Not affected
V Not affected
C Not affected
Instruction Format:
15
0
MOTOROLA
4-46
14
13
0
Z
V
12
11
I
0
I
C
10
9
8
7
6
5
4
3
2
0
0
I
1
0
I
1
1
0
I
0
I
INSTRUCTION SET
CPU32 REFERENCE MANUAL
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