The Hobbit (v1.0): Routine at 9C42

9C42: Total weight of an object's contents

Returns in A the total weight (byte 3) of everything held by object A, including the contents of containers, found by 9C55. The result is $FF if it overflows.

Input
A	Object

Output
A	Weight

9C42

PUSH BC

TOTAL WEIGHT: save the caller's BC

9C43

LD B,$00

B=0 tells the shared routine below to add up weights

This entry point is used by the routine at 9C3D.

9C45

PUSH IX

Save the caller's IX and IY, which the search below will use

9C47

PUSH IY

9C49

LD C,$00

C will be the running total, starting at 0

9C4B

CALL $9C55

Add up everything object A holds

9C4E

LD A,C

A = the finished total

9C4F

POP IY

Restore the caller's IY and IX

9C51

POP IX

9C53

POP BC

Restore the caller's BC

9C54

RET