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1、? ? ? ?1. 8086/8088 ?_?A ?B ?C ? !?2“8086/8088 CPU ? BIU ?_?A#$% ?JMP FAR PTR TABLEBX? CS=_, IP=_? ?1“? DATA ?:;?BDATA DB 89920-4012040, 2120F8H124 ? ? ? ? -(A) ?2? q? ? ?s -K?:;FGOt?AL=_DL=_?6?g? Xg=? JNC NEXT ?Y JGE NEXT fl?:?FGO? AL=_,X DATA =?c?Y?q? DATAc?= DB ?Y DWs ?FG?FGOt?MOV SI?OFFSET DATAM
2、OV CL?SI?INC SIMOVAL?SIINC SIXORCH?CHMOV DL, ALDECCLAGAIN?CMP AL?SIJNC NEXTMOVAL?SI?NEXT?ADD DL,SIINC SILOOP AGAIN2“ c?T?(P? 200=0C8H)?c?Y?WINSTRING?b?TFGO?6?q1s?9?T? CRq=0DHsK?q000C7Hs?m? CL, X?=?fl?-1 ?m CL =? ?1“ ?*+DE? 8253 ()hicd=t,- ?cd?*+? 8253 ? 0 ?lmdnoY 2MHZ ?(1)0 ?cdd4?Pd4?p?v?(2)X? 1 2 ?
3、, ?P?cdd4, ?9?;(3)X?f? 0 ?, ?#?cd 1 ? 20 ?X?=t?cd?, ?9=tFG=?Ot?-(A) ? 3 ?q? ? ?s-? ?cd?DE=?O?-? ? ? ? ?NO.?2X?,-?|?qcd?R?s ?#?m? ? ?= !“ Y#$?,-%Y q? s?*0+#?b?*A+#$? *B+?6Z?FGO?C,-? .?/! 0? ?DpEX:B-(A) ? 4 ?q? ? ?s-? ? ?_ ?_?, ? 35 ? ? ? ? ? !“ #? ?$?%?“#/ 9:;?A?B !?C?D=“#E $?F?E$?s= ?“#E $? VW? ?, ?
4、CPUL?i8255T?HSTX ?, “?_E $? ? ? l ?x? %_?_ ?hKiAa? 0000. ?D=/? (AV% ?0000 !?hB !*?CQ ?mmmm.iE?atuD? (3?b45?%/GH?45E?s?i/-F ?GE? ?(? 30 ?)1. vYH2?B?I?c?#?Q )?J? ? %?_? .# Q ?J? ? _$EKL?D=? $?M$? n1,?K? ?NO?g _0Y/_6Y/_7YGH? %?_?/)?/K?|?_4Y /_5YxL?P?QN O?H? _$ 1?/ 0?/ ?/ . n?| E ?h?i?B? ?R2)R2KR21R2nR?
5、/ ?(2)?b45?D=|?-? 5 ? 5 ? -? ? ? ? 2 ?, ? 35 ? ? ? ? ? ? ? ? ? ? ? ? !“# ?$%?$?6ABCDEF?G ? ? H?IJKJ?L JKJ?M?NOPQRST JKJ?U JKJ?U NVW? JKJ ST ? ? X? ? ?$# ? (2 ?)(2)VB ? ? K9?M?$K55M_?5JL?M?Z? ? K9?M?$aM?bL?M?Z? ? J?M?aM?c?bL defghZ? iJ?aM?bLH?MIZjj?(?j?J?Zjj?jk? ?,=?H? ?I MOV CX,N;lmno 1 ? MOV BX, OF
6、FSET BUF;p SI, DI, p LEA BX,BUF 1 ? MOV DX,0Nqrsno tu SUM vw 1 ? AGAIN:MOV AX,BXNxy 1 ? CMP AX,5555HNz 5555H 1 ? JZ NEXT2 CMP AX,0AAAAHN1 ? JZ NEXT1 CMP AX,0;1 JZ FINISH ADD DX,AX; qr ADD SUM,AX, 1 ? NEXT1:INC BXN0.5 INC BX; 0.5 LOOP AGAIN;lm 1 ? MOV AL,0FFHN#| 1 ? MOV ERROR,ALJMP EXIT_ERR;1 ? NEXT2
7、: MOV PT5555,BX N1 ? JMP NEXT1 FINISH: MOV AL,0N1 ? MOV ERROR,AL EXIT: MOV SUM,DX;?qrs 1 ?EXIT_ERR: H1I? 3 ? =? 2 ? H2IEXIT_ERR ? EXIT ?Y? ?(? 30 ?)1.?12 ?1.5 ? ?“?Z“?c?c?c?c?(?(55? ?“?Z“?c?c“?c“?c?55? ?“?Z“?c?c“?c“?c“?(?555? ?“?c?Z“?c?c“?c?c?c?55? ?“?c“?Z“?c?c“?c?c“?c“?555? ?J?“?J?J?H“?I?J?“?HJ?I?.
8、?( ? ? ? ? ? ? ? ? ? ? ? (2) 4 ? 1 ? ? 1 ?PA ?PAPORT EQU 280H283HPB ?PBPORT EQU 284H287HPC ?PCPORT EQU 288H28BH(3) 9 ? MOV DX, PAPORTIN AL,DX;1 ?CMP AL,0FFH (p 00)JZ ALLONN1 ?CMP AL,00 ;(p 0FFH)JZ ALLOFFN1 ?PARTON:MOV AL,01H ;1 ? 00000001B, p MOV AL 11111110BHFEHI? ? iJ?K?_N? ?H?G?I ?K?K9?$?L?5? ? i
9、J?K?_N? ?H?G?I ?K55/K9?$?L5? ? ?K?_/?K9?U$J?JK?_ K?_?U$? ?1? ? 2 ?, ? 35 ? ? ? ? ? ? ? ? ? ? ? ? ? ? !“#$?%?%? ?%? ? D? ?”“:?L45 ? D 45?fi45Y(A?gHQFG D?D?Y?45?c?qD?c?D? %? ? ?9Y? ? 45?12?;o?D? ? ?;o?D? ? ? ?12?6|?D? ? l?D? ?3?6|?D?%? ? ?l?D? ? ? D? 6=/?D? ?D?6=/?D? ? ?)*?B ?o?p 6=/? 6=/?p?w? ?;o?p? ?6=/?
