attn

Attention

attn

Stops execution and alerts the hardware debugger.

Details

Stops execution and signals the hardware debugger, allowing entry into debug mode. This is a privileged instruction that halts the processor and alerts external debugging hardware. No condition registers or status fields are affected by the instruction itself; the processor state is frozen pending debugger intervention.

Pseudocode Operation

SignalDebugger()

Example

attn

Encoding

Binary Layout
000000
0
00000
6
00000
11
00000
16
256
21
/
31
 
Format X-form
Opcode 0x00000200
Extension Privileged

Operands