微機(jī)原理與接口技術(shù)課程設(shè)計(jì)-鍵盤顯示控制器-文庫吧
2025-05-16 18:02 本頁面
【正文】 MOVDX,TIME1 ；OUTDX,ALMOVAL,AHOUTDX,ALMOVAX,STACKMOVSS,AXMOVSP,TOPMOVAX,DATAMOVDS,AXMOVDX,OFFSETMESMOVAH,09INT21HMOVAX,CSMOVDS,AXMOVDX,OFFSETINT_PROCMOVAX,250FHINT21H ；置IRQT中斷向量MOVDX,INTA01INAL,DXANDAL,7FHOUTDX,ALMOVDX,PORT1MOVAL,0D3HOUTDX,AL ；8279清零MOVAL,2AHOUTDX,AL ；置8279時(shí)鐘命令MOVAL,40HOUTDX,AL ；讀FIFORAM命令MOVAL,00HOUTDX,AL ；置鍵盤顯示模式MOVAL,80HOUTDX,AL ；寫RAM命令STIKEY1:CALLKET2 ；調(diào)鍵盤顯示子程序CMPHOUR2,0AHJZNEXT2NEXT1:CMPAL,0CH ；是否“C”命令JNZLP0NEXT2:MOVSIGH,00HMOVHOUR2,00HMOVHOUR1,00HMOVMIN2,00HMOVMIN1,00HMOVSEC2,00HMOVSEC1,00HLP0:CMPAL,0EH ；是否“E”命令JNZLP1MOVSIGH,00HCLIMOVDX,INTA01INAL,DXORAL,80HOUTDX,ALSTIMOVAX,4C00H ；是“E”命令返回DOSINT21HLP1:16
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