Routines
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CEDE: Process Room Display Parameter
Used by the routines at ProcessScriptDisplay, ShowRoomDescription, CDBF, CE18, HandleRoomDisplay and RunSimpleAction.
Resolves special parameter values used in room display scripts to actual game values (current room, character ID, location value).
Input
A Parameter value (F5-FD are special values)
Output
A Resolved parameter value
ProcessRoomDisplayParameter CEDE CP $F5 Return unchanged if the parameter is not a special value (less than F5).
CEE0 RET C
CEE1 CP $FE Return unchanged when the parameter is at least FE.
CEE3 RET NC
CEE4 CP $FA Jump ahead to ProcessRoomDisplayParameter_CheckCharacterID if the room is not FA.
CEE6 JR NZ,ProcessRoomDisplayParameter_CheckCharacterID
CEE8 LD A,($9FD6) Read the room id at CurrentRoom_ID into A.
CEEB RET Return.
A parameter of FB is the character being processed.
ProcessRoomDisplayParameter_CheckCharacterID CEEC CP $FB Go to ProcessRoomDisplayParameter_GetLocationValue when the parameter is not the current character (FB).
CEEE JR NZ,ProcessRoomDisplayParameter_GetLocationValue
CEF0 LD A,($A036) Load the character being processed.
CEF3 RET Return.
A parameter of FC is the high byte of the location value.
ProcessRoomDisplayParameter_GetLocationValue CEF4 CP $FC Compare the parameter with FC and load the high byte of the location value at LocationValue.
CEF6 LD A,($9FD8)
CEF9 RET Z Return if it is FC.
CEFA LD A,($9FD7) Read the location value at LocationValue.
CEFD RET Return.
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