0x72 — bgm_control

Reads one operand and calls either CRadiSound::StopBgm or CRadiSound::PauseBgm depending on handler_arg_byte & 0x80.

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

At a glance

Opcode	`0x72` (114)
Handler	`CRadiScript::Command_72`
Signature	`CRadiScript::Command_72(int,SCR_DATA*,unsigned int,unsigned int)`
Translation unit	`r_script_run7.cpp`
Address	— debug build; click for all 3
Handler size	`0x58` (88 bytes)
Engine name	`bgm_control`
Family	Primitives, textures, sound and movies
Command size	`4 + extra_words * 4` bytes

Handler behaviour

Reads one operand and calls either CRadiSound::StopBgm or CRadiSound::PauseBgm depending on handler_arg_byte & 0x80.

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   |  0x72          |
+----------------+----------------+----------------+----------------+

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
`mode`	input	Handler path selector taken from the argument byte. The meaning is specific to each command.
`pause`	input	Argument-byte bit 7: 1 calls CRadiSound::PauseBgm, 0 calls StopBgm.
`value`	input	The value the condition compares against.
`yield`	derived	Pause the script here for one game frame; the next command runs on the following update. Lines without it keep running immediately.

Engine calls

Engine functions this handler was observed calling:

CRadiSound::PauseBgm(int,int)
CRadiSound::StopBgm(int,int)

Bit masks

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

0xFFFF 0x0080 0x0003