0x8B — talk_bustup_display

Talk bustup display. Argument bit 0 selects either the current script character at SCR_DATA+0x10/+0x12 or an explicit stream word, resolves it through GetAbstractionCharacterNumber, calls CCharacterManager::GetCharacterClass2, then dispatches CTalkBustupTotalControl::BustupDisp.

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

At a glance

Opcode	`0x8B` (139)
Handler	`CRadiScript::Command_8b`
Signature	`CRadiScript::Command_8b(int,SCR_DATA*,unsigned int,unsigned int)`
Translation unit	`r_script_run8.cpp`
Address	— debug build; click for all 3
Handler size	`0x13C` (316 bytes)
Engine name	`talk_bustup_display`
Family	Vibration, dialogue and text
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   |  0x8B          |
+----------------+----------------+----------------+----------------+

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

7 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
`action`	input	What to do with the portrait, from `(arg >> 6)`. `CTalkBustupTotalControl::BustupDisp` branches on exactly three values: 0 hides it (`CTalkBustup::SetVisiblity(false)`), 1 creates or reinitialises it (`Create`), 2 erases it (`EraseStart`). Any other value does nothing.
`character`	input	The packed 32-bit character selector word. Its low half is the character id and byte 2 is a secondary class/variant input; see `character_number` and `character_variant`.
`character_number`	derived	Low 16 bits of the character selector: the character/actor id.
`character_variant`	derived	Byte 2 of the character selector: a secondary character/class input passed alongside the id.
`has_erase_duration`	derived	Argument bit 2: whether an `erase_duration` float follows on this line.
`portrait_slot`	input	Which of the two portrait slots this acts on, from `(arg >> 1) & 1`. `Create` indexes the pointer array at `controller + 0x3C + slot * 4` with it.
`portrait_variant`	input	Presentation variant, from `(arg >> 4) & 3`, forwarded to `Create`, `CTalkBustup::Init` and `ReInit`. Which variant each value selects is not established -- only that it is not the hide/create/erase action.

Engine calls

Engine functions this handler was observed calling:

CCharacterManager::GetCharacterClass2(int,unsigned int,const CCharacter*,unsigned int)
CRadiScript::GetAbstractionCharacterNumber(unsigned int&,unsigned int&,const SCR_DATA*)
CTalkBustupTotalControl::BustupDisp(CCharacter*,unsigned char,unsigned char,unsigned char,float)

Bit masks

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

0x0001 0x00FF 0xFFFF 0x0003 0x0004