Routines
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C456: Validate Object
Used by the routines at PrintObjects and CheckRoomObjects.
Input
BC Object counter
Output
F Z is unset if the object is valid, unset when invalid
ValidateObject C456 PUSH AF Stash AF and BC on the stack.
C457 PUSH BC
C458 INC BC Adjust the object counter.
C459 LD A,($BD28) A=*Count_Items.
C45C SUB C Calculate the index and store the result in E.
C45D LD E,A
C45E LD IX,($BD12) IX=*Pointer_ItemDescriptions.
C462 CALL GetTableEntry Call GetTableEntry.
C465 POP BC Restore the object counter from the stack.
C466 LD A,H Jump to InvalidObject if the object is invalid.
C467 OR L
C468 JR Z,InvalidObject
C46A POP AF Restore the object type from the stack.
C46B AND A Clear the Z flag.
C46C RET Return.
InvalidObject C46D POP AF Restore AF from the stack.
C46E CP A Set the Z flag.
C46F RET Return.
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