Halt Digit

Halt instructions are dependent upon an execution digit located in absolute memory location 48 which determines the course of action as follows:

Value Action
0 Halt is executed
1 Halt is executed if Privileged Enabled.
2 Halt is executed if not Privileged Enabled.
3 Halt is ignored.
4-F Reserved.

If the halt is executed, the processor will enter a WAIT state that requires operator intervention to allow the processor to continue the execution of the instruction.

If the halt is not executed, no signficant action will be performed by the processor.

Use of reserved values will cause an Invalid Instruction fault.

See HBR, HBK, Kernel Data Area

processor_state/halt_digit.txt · Last modified: 2008/11/26 09:11 by scott
 
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 3.0 Unported
Recent changes RSS feed Donate Powered by PHP Valid XHTML 1.0 Valid CSS Driven by DokuWiki