硬件實(shí)驗(yàn)解答ppt課件

1、實(shí)驗(yàn)實(shí)驗(yàn)48259中斷實(shí)驗(yàn)中斷實(shí)驗(yàn)STACK SEGMENT STACKDW 64 DUP(?)STACK ENDSCODE SEGMENTASSUME CS:CODE，SS:STACKSTART:PUSH DS ;保存數(shù)據(jù)段保存數(shù)據(jù)段MOV AX,0000HMOV DS,AX ；數(shù)據(jù)段清；數(shù)據(jù)段清0MOV AX,OFFSET IRQ7 ；取中斷程序入口地址（相對(duì)地址）；取中斷程序入口地址（相對(duì)地址）ADD AX,2000H ；加裝載時(shí)；加裝載時(shí)IP2000H地址（絕對(duì)地址）地址（絕對(duì)地址） MOV SI,003CH ；填；填8259中斷中斷7中斷向量中斷向量MOV SI,AX ；填偏移地址；

2、填偏移地址MOV AX,0000H ；段地址；段地址CS0000HMOV SI,003EHMOV SI,AX ；填段地址向量；填段地址向量CLI ；關(guān)中段；關(guān)中段1；.POP DSIN AL,21H ；讀；讀8259中斷屏蔽字中斷屏蔽字AND AL,7FH ；開(kāi)；開(kāi)8259中斷中斷7OUT 21H,ALMOV CX,000AHA1:CMP CX,0000H JNZ A2IN AL,21HOR AL,80HOUT 21H,ALSTIHLTA2:STIJMP A1 ；斷點(diǎn)；斷點(diǎn)IRQ7:MOV AX,0137H ；中斷程序入口地址；中斷程序入口地址INT 10H ；BIOS功能調(diào)用，功能調(diào)用，MO

3、V AX,0120H ；顯示；顯示“7”和空格和空格INT 10HDEC CXMOV AL,20HOUT 20H,ALCLIIRET CODE ENDS END START2；.實(shí)驗(yàn)實(shí)驗(yàn)48259中斷實(shí)驗(yàn)中斷實(shí)驗(yàn)注意注意:程序中程序中8259中斷向量地址為絕對(duì)地址中斷向量地址為絕對(duì)地址,已定義為段地址已定義為段地址CS=0000H,偏移地址偏移地址IP=2000H,故裝載時(shí)一定按此填入故裝載時(shí)一定按此填入CS與與IP地址地址.后面實(shí)驗(yàn)不再重述后面實(shí)驗(yàn)不再重述). 分析程序分析程序 問(wèn)題？問(wèn)題？ 實(shí)驗(yàn)考試實(shí)驗(yàn)考試如果改變?yōu)槿绻淖優(yōu)镮RQ3,或其它，程序應(yīng)如何改動(dòng)？或其它，程序應(yīng)如何改動(dòng)？3；.

4、實(shí)驗(yàn)實(shí)驗(yàn)58255并行接口應(yīng)用實(shí)驗(yàn)并行接口應(yīng)用實(shí)驗(yàn)(1)STACK SEGMENT STACK DW 64 DUP(?)STACK ENDSCODE SEGMENT ASSUME CS:CODE，SS: STACKSTART: MOV AL,83H ;10000011 OUT 63H,ALA1: IN AL,61H OUT 60H,AL JMP A1CODE ENDS END START4；.實(shí)驗(yàn)實(shí)驗(yàn)58255并行接口應(yīng)用實(shí)驗(yàn)并行接口應(yīng)用實(shí)驗(yàn)(2)STACK SEGMENT STACKDW 64 DUP(?)STACK ENDSCODE SEGMENTASSUME CS:CODESTART:

5、CLI ;關(guān)中斷關(guān)中斷MOV AL,86H ;控制字控制字10000110OUT 63H,ALMOV AL,05H ;控制字控制字00000101pc2置位，置位，kk1下降沿觸發(fā)下降沿觸發(fā)OUT 63H,ALMOV AX,0000HMOV DS,AXMOV AX,OFFSET IRQ7ADD AX,2000H MOV SI,003CHMOV SI,AX5；. MOV AX,0000HMOV SI,003EHMOV SI,AXIN AL,21HAND AL,7FHOUT 21H,ALA1:STI ;開(kāi)中斷開(kāi)中斷HLTJMP A1IRQ7:IN AL,61HOUT 60H,ALMOV AL,20

6、HOUT 20H,ALIRETCODE ENDS END START6；.STACK SEGMENT STACK DW 256 DUP(?)STACK ENDSDATA SEGMENTTABLE DB 01H,03H,02H,06H,04H,0CH,08H,09H DATA ENDSCODE SEGMENT ASSUME CS:CODE,DS:DATASTART: MOV AX,DATA MOV DS,AXMAIN: MOV AL,90H OUT 63H,ALA1: MOV BX,OFFSET TABLE MOV CX,0008H A2: MOVAL,BX OUT61H,AL CALLDALL

7、Y INCBX LOOPA2 JMPA1DALLY:PUSHCX MOV CX,5000HA3:PUSHAXPOPAXLOOPA3POPCXRETCODE ENDS END START 7；.實(shí)驗(yàn)實(shí)驗(yàn)68253計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)設(shè)定8253的2#通道工作方式為方式0，用于事件計(jì)數(shù)，當(dāng)計(jì)數(shù)值為5時(shí)，發(fā)出中斷請(qǐng)求信號(hào)，顯示“M”。實(shí)驗(yàn)部分程序如下：Stack segment stack dw 64 dup(?)Stack endsCode segment assume ss:code,ss:stackStart: in al,21h and al,7fh out 21h,al MOV A

8、L,90HOUT 43H,ALA1:MOV AL,05HOUT 42H,AL hlt sti jmp a1 mov ax,014dh int 10h mov ax,0120h int 10h Mov al,20h out 20h,al iretCode ends end start 8；.實(shí)驗(yàn)實(shí)驗(yàn)68253計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)(2)9；.實(shí)驗(yàn)實(shí)驗(yàn)68253計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)(2)10；.實(shí)驗(yàn)實(shí)驗(yàn)68253計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)(2)STACK SEGMENT STACKDW 64 DUP(?)STACK ENDSCODE SEGMENTASSUME CS:CODESTA

9、RT: PUSH DSMOV AX,0000HMOV DS,AXMOV AX,OFFSET IRQ0ADD AX,2000HMOV SI,0020HMOV SI,AXMOV AX,0000HMOV SI,0022HMOV SI,AXPOP DSMOV AL,0FCHOUT 21H,ALMOV AL,15HOUT 43H,ALMOV AL,0FFHOUT 40H,ALMOV DL,30HA1:STIJMP A1IRQ0:MOV AH,01HMOV AL,DL CMP AL,3AHJNZ A2MOV AL,0DHINT 10H11；.實(shí)驗(yàn)實(shí)驗(yàn)68253計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)計(jì)數(shù)器應(yīng)用實(shí)驗(yàn)(2) MOV AL,30HA2:INT 10HINC AXMOV DL,ALMOV