Used by the routine at MORE_ROOM_COMMANDS.

Walks the whole object table (OBJECTS) and makes a record (PLACE_OBJECT) for every entry whose room is ROOM, in the table's order, from FREE_RECORD on. First every record from there to the end of the area (RECORDS; the clean copy begins where it ends) is cleared.

An entry is a room, a type and four more bytes for a type below $46 -- the things, which can be moved and carried from room to room -- or nine for the rest (doors, walls and the like); $FF ends the table. A thing's record also gets its number in the table, counting from 1, at +19: the code that moves a thing to another room or into the knight's hands writes its new room into its entry by that number (SET_THING_ROOM). The number is a byte, which is enough because the 163 things come first.

Called once in each drawing of a room, by MORE_ROOM_COMMANDS's $E4 $04 or $E4 $05. The most records a room's drawing makes is 30 (room 71), besides the knight's and the five carried; the area has room for 43 (measured, in rooms 1-80).