资源描述：
《8259调试注意事项》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、1.18259A不能仿真的解决办法8259A不能仿真，采用如下办法就能仿真了。8259A问题解决:在VSMMode后面加空格DLL后一直点NEXT新建个8259A的芯片即可。软件程序方面，proteus中的8086取得的中断类型号是最后发到数据总线上的数据，并非由8259发出的中断类型号，在等待中断之前，需要向数据总线上送中断类型号。示例程序：.MODELSMALL.8086.STACK.code.startupPROTAEQU280HPROTBEQU282HPROTCEQU284HPROTDEQU286HMOVDX,PROTDMOVAL,
2、10000000BOUTDX,ALMOVAL,00110111B;通道0初始化MOVDX,296HOUTDX,ALMOVAL,00HMOVDX,290HOUTDX,ALMOVAL,10HMOVDX,290HOUTDX,ALMOVAL,01110111B;通道1初始化MOVDX,296HOUTDX,ALMOVAL,00HMOVDX,292HOUTDX,ALMOVAL,10HMOVDX,292HOUTDX,AL;8259程序CLICS8259AEQU2A0HCS8259BEQU2A2HICW1EQU00010011BICW2EQU20H;中断类
3、型号，需要与后续送到数据总线上的值一致ICW4EQU01HOCW1EQU00HMOVDX,CS8259A;initilizationMOVAL,ICW1OUTDX,ALMOVDX,CS8259BMOVAL,ICW2OUTDX,ALMOVAL,ICW4OUTDX,ALMOVAL,OCW1OUTDX,AL;interruptvectorMOVAX,0MOVES,AXMOVSI,20H*4MOVDX,OFFSETTIMEMOVES:[SI],DXMOVDX,SEGTIMEMOVES:[SI+2],DXMOVDX,CS8259AMOVAL,20H;
4、送中断类型号到数据总线OUTDX,ALSTIJMP$TIMEPROC;中断服务程序PUSHAXPUSHBXPUSHCXPUSHDXSTImovdx,PROTBmoval,3fhoutdx,almovdx,PROTAmovsi,h1moval,table[si]outdx,alinch1movdx,PROTBmoval,1fhoutdx,alcalldelayMOVDX,CS8259AMOVAL,20HOUTDX,ALCLIPOPDXPOPCXPOPBXPOPAXIRETTIMEENDPdelayprocnearpushbxpushcxmov
5、bx,1lp2:movcx,200lp3:looplp3decbxjnzlp2popcxpopbxretdelayendp.datah1dw01hh2dw02hm1dw00hm2dw00hs1dw00hs2dw00htabledb3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FHTAB_END=$.stackEND
