0x0D — marker_seek

Marker seek. Selector bits in the handler argument choose where the marker index comes from — a direct operand, a run of config/event flags, an event value, or the in-game clock. The marker is located through GetMarkerAddress and the resolved address is written to SCR_DATA+0x0C.

proven— handler traced, and exercised by at least one shipped script.

At a glance

Opcode	`0x0D` (13)
Handler	`CRadiScript::Command_0d`
Signature	`CRadiScript::Command_0d(int,SCR_DATA*,unsigned int,unsigned int)`
Translation unit	`r_script_run0.cpp`
Address	— debug build; click for all 3
Handler size	`0x258` (600 bytes)
Engine name	`marker_seek`
Family	Script control, flags and values
Command size	`4 + extra_words * 4` bytes

Handler behaviour

Encoding

The command header is one 32-bit word, as described in §3 Instruction encoding:

 31            24 23            16 15             8 7              0
+----------------+----------------+----------------+----------------+
|  flags         |  argument byte |  extra words   |  0x0D          |
+----------------+----------------+----------------+----------------+

Bits 8–15 give the number of 32-bit operand words that follow. Bits 16–23 are handed to the handler as a bitfield; on character commands bit 0 normally says whether a character selector word is present. Bit 31 is the keep-going bit.

Operand fields

4 documented fields. input fields are read from the command's operand words; derived fields are computed from other fields rather than stored separately.

Field	Role	Meaning
`advance_if_lower`	derived	Scan-direction flag decoded from the selector word; preserved exactly.
`event_value`	input	Script event-value id that the condition or command reads.
`marker_type`	input	Which kind of `marker` this is; the handler branches on it.
`selector`	input	Sub-selector byte choosing which variant of the command's behaviour runs.

Engine calls

Engine functions this handler was observed calling:

CRadiApp::GetConfigEventFlag(unsigned int) const
CRadiScript::GetEventValueForScript(int,const SCR_DATA*)
CRadiScript::GetMarkerAddress(const EVDFILE_HEAD*,int)

Bit masks

Masks the handler applies to its argument byte or operand words:

0x0007 0x0001 0xFFFF 0x00FF