Labels:bulletin board | reckoner | sky OCR: part opcode for nog word ptr neg [reg mem16] ds:[140h] assembles pou -reg -rm byte containing 40 the rest of the opcode Direct address -bit displacement) which Is interpreted mod extended rm opcode mod and rm together select so direct word Given of an the mod opcode .601 byte W- byte of F7h, are bits addr ossing, the following the mod-reg-rm 5-3 treated as an extension of the opcode byte contains the address the word to negate byte not as a lrog field. Together, an opcode byto of F7 and bits the mod. reg -rm byte 011b tell the 8088 to perform negation of the word according to the mod and rm fields. FIGURE 7.9 The interpretation of the bytes assembled for the in struction neg word ptr ds:[140h] illustrating that single -operand pauu reg- instructions bits to f the mod reg rm byte serve as a ...
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