Routines
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CDC2: Next object for the overlap test
Used by the routines at test_overlap_obj, overlap_x_decided and overlap_y_decided.
Part of test_overlap_obj. The union rectangle lives in D, E, H and L, so the step to the next record is done in the other register set.
next_overlap_obj CDC2 EXX IY += 32, without disturbing DE and HL
CDC3 LD DE,$0020
CDC6 ADD IY,DE
CDC8 EXX
CDC9 DJNZ test_overlap_obj round all forty
CDCB RET
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