Labels:book | box | bulletin board | cabinet | dialog box | reckoner | shelf | sky OCR: Memory 2000 1000 nop 21001 jmp 1001 21002 1 21003 nor 21004 nop 21005 nop 1007 21006 nop 100 nop 21008 non Memory 2000 21000 nop 21001 jmp 100 .002 ax .003 nop 21004 nop 21005 nop 1007 21006 nop 1007 nop 1008 dou FIGURE 12.1 The jmp reg16 instruction is one of the few jump in structions that performs absolute branch that is, a branch to a specific offset in the code segment Instead most the 8088's jump instructions use relative branch. ing as shown in Figure 12.2). This figure shows the steps that occuI as jup ax brane hes, with the thin lines showing how IP advances as the execution of jmp ax progresses. A Here. imp ax is just starting. B IX copied into IP after IP has advanced past (and allowed the fetching of) the last byte of the jmp instruction the mod reg U bytc that specifies AX as ...
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