Labels:box | bulletin board | data system | shelf | sky OCR: DF Memory 20000 DS 2000 20001 20002 0005 Sourco 20003 Destinatlon block 20004 2000 block 20005 20006 0006 20007 0005 B Memory DF 20000 2000 20001 20002 0000 Source 20003 block 20004 block Destination 2000 20005 20006 0001 20007 0000 FIGURE 11.3 when the source block in a block copy overlaps the destination hlock and starts at a lower address than the destination block, the copy must proceed from higher addresses to lower addresses. When string instructions arc used DF musr he ser to in order to handle this overlap case properly A) The state of the PC before rep movsh is to copy such an overlapping block. (B The state of the PC after the Kdoy is comnleied Momory 3000 Destir nation movsb executed afier completed
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