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W(xu)֮ңW(xu)YӍl(f)ƽ_
W(xu)֮

ָIJ(sh)

    l(f)rg2018-09-16    x
    ԴW(xu)֮
ָIJ(sh)(sh)ַķʽQ錤ַʽָIJ(sh)Žׂ

1(sh)ָȡָͬr(sh)ҲSȡ@N(sh)Q(sh)

2(sh)CPUij(ni)ĴСԓĴCPU(ni)ȡ(sh)Ҳ^

3(sh)ڃ(ni)惦ڃ(ni)惦CPUⲿڌҴ˷N(sh)rҪ(zh)һڣҵԓ(sh)ڃ(ni)дŵĵַُԓ ַȡ(sh)80x86΢Cϵy(tng)κ΃(ni)ԪĵַɶλַƫƵַַQƫMλַɶμĴṩƫƵַtĂ ֽM϶ɣ

ַĴ

gַĴQ׃ַĴ



λ

@ĂֱQƫƵַԪһ㌢@ķNԪذijNӋ㷽MγɵƫƵַQЧַEAEffectiveAddressĽMϷʽӋ㷽飺

EAַ+gַ×ӣ+λ

16λַrλ8λ16λBXBPַĴSIDIgַĴӞ1

32λַrʹ8λ32λλ32λͨüĴַĴgַĴESPgַҿɲ248׷Nͬıӡ

@ķNԪؿɃ(yu)Mϳ9N惦ַʽ(sh)ַͼĴַ11NַʽԔӑՓf(sh)(j)ČַʽԅRZеMOVָָĸʽ飺MOVĿ(bio)(sh)Դ(sh)书njԴ(sh)͵Ŀ(bio)(sh)

1.(sh)ַImmediateAddressing

ָ(sh)ָڲaOP󡣲(sh)8λ16λ32λָ(zh)^(sh)ָһֱӏָA(y)ȡԪȡҪL惦@Nַʽ(zh)ٶȿ

MOVAX1020HָУ1020H(sh)ԓָĹnj(sh)1020H͵AX(zh)ʾDҊ

(sh)ַrֻSԴ(sh)(sh)Ŀ(bio)(sh)ǼĴ惦ǽoĴ惦Ԫxֵ

2.ĴַRegisterAddressing

ָ(sh)CPUijĴڴȡ(sh)CPU(ni)MУԈ(zh)ٶȿ

磺MOVAL,BL

(zh)rҊ

3.ֱӌַDirectAddressing

(sh)һڴ惦Ĕ(sh)(j)У(sh)ЧַEA16λ32λָoֱӌַУȡò(sh)Ų(sh)Ĵ惦Ԫַ(sh)ڔ(sh)(j)tãַDS×16+EA^̡

磺MOVAX,DS[2000H]

O(sh)DS3000Hַ3000H×16+2000H32000H惦32000H32001HɂԪă(ni)͵AXĴע͵ַĴ惦Ԫ32000Hă(ni)͵AXĵֹ(ji)ALС

ֱӌַS÷ַ̖攵(sh)ֵַ磺MOVAX[DATA]˕r׃DATAŲ(sh)Ĵ惦Ԫķַָ̖߀Ɍ飺MOVAX,DATAǵЧֱӌַm̎΂׃

4.ĴgӌַRegisterIndirectAddressing

(sh)ڴ惦(sh)ЧַEAijĴRegУ䌤ַʽĴʹ16λַ32λַrһӡ

116λַ

ƫƵַSIDIBXBP

ָָļĴBXSIDIt(sh)ڔ(sh)(j)(sh)ַ飺

ַDS×16+BX

……SI

……DI

ָָļĴBPt(sh)ڶїλַSSУ(sh)ַ飺

ַSS×16+BP

232λַ

832λͨüĴĴgӌַESPEBPĬJμĴSS6ͨüĴĬJμĴDS
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