.O - Override default behaviour

Override the default system behaviour for handling certain events.

Syntax:

────.O ─┬─ Q ────────┬────────────────────────────────────────
          ├─ N ─┬── n ─┘
          └─ F ─┘

Parameters:

Q

Query override settings in effect.
N
Activate (turn oN) overrides for event n.
F
Deactivate (turn ofF) overrides for event n.
n
Specifies the override event number. Currently only one override event is defined, which is event number 1. When active this forces breakpoints to be serviced by the Kernel Debugger instead of the DosDebug or DosPTrace APIs.

This only affects debugging situations where a debugging application is active under the Kernel Debugger.

Results & Notes:

This command was introduced with fix pack 29 for Warp 3.0 and fix pack 1 for Warp 4.0.

Prior to the introduction of this command, the only way to override DosDebug and DosPTrace was to zero to address of the Debug Control Block ((ptda_pdcb +0x38)) in the PTDA of the debugee process.

.OQ displays information about overrides in a tabular form as shown in the following example:

#.OF 1
DosDebugAPI Override is now OFF.
#.OQ
Overide(s) Query Information
# | Overide          |   Status
--------------------------------------------
1 | DosDebugAPI      |   OVERRIDE OFF
--------------------------------------------

#.ON 1
DosDebugAPI Override is now ON.
#.OQ
Overide(s) Query Information
# | Overide          |   Status
--------------------------------------------
1 | DosDebugAPI      |   OVERRIDE ON
--------------------------------------------

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