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GoodID -- test if an identifier follows the IFF 85 specification. (V36)
isok = GoodID(id); D0 D0 LONG GoodID(LONG);
Tests the given longword identifier to see if it meets all the EA IFF 85 specifications for a chunk ID. If so, it returns non-zero, otherwise 0.
id - potential 32 bit identifier.
isok - non-zero if this is a valid ID, 0 otherwise.
GoodType()
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