【正文】 UM 。鍵值轉(zhuǎn)換為鍵號(hào) CMP AL,09H 。輸入的鍵值不在0~9范圍內(nèi)，及輸入錯(cuò)誤，重新輸入 JG CHULI MOV AH,AL CMP AH,09H 。輸入的值大90的話，重新輸入 JG CHULI ADD SUM,AH JMP NO9 NO9: LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA JMP START1 CHULI: LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA CALL INIT8279_1 MOV SUM,0 MOV KEYCOUNT,0 JMP START1 START_EXIT: JMP $ 。處理小數(shù)部分 X5: MOV AL,06H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,02H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H JMP X8X6: MOV AL,07H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,0 JMP X8X7: MOV AL,08H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,07H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H JMP X8 XIAOSHU PROC NEAR PUSH AX PUSH BX PUSH CX PUSH DX CMP AL,0H JE X0 CMP AL,01H JE X1 CMP AL,02H JE X2 CMP AL,03H JE X3 CMP AL,04H JE X4 CMP AL,05H JE X5 CMP AL,06H JE X6 CMP AL,07H JE X7X0: MOV AL,0H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,0H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,0 JMP X8X1: MOV AL,01H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,02H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H JMP X8X2: MOV AL,02H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,0H JMP X8X3: MOV AL,03H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,07H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,05H JMP X8X4: MOV AL,05H AND AL,1FH LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,00H LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATA MOV AL,00H JMP X8 X8: LEA BX,LED_TAB 。字型碼表 XLAT CALL WRITE_DATAXIANSHI: CALL SCAN_KEY 。鍵掃描 JNC XIANSHI 。鍵的輸入來控制顯示結(jié)果的時(shí)間 POP DX POP CX POP BX POP AXXIAOSHU ENDP。8279初始化INIT8279 PROC NEARMOV DX,CMD_8279 。CMD_8279為寫命令地址、讀狀地址 MOV AL,34H ?？删幊虝r(shí)鐘設(shè)置,設(shè)置分頻系數(shù)(20分頻） OUT DX,AL MOV AL,0H 。8位字符顯示,左邊輸入,外部譯碼鍵掃描方式,雙鍵互鎖，10H右入口 OUT DX,AL CALL INIT8279_1 RETINIT8279 ENDPINIT8279_1 PROC NEAR CALL CLEAR 。清顯示 MOV AL,90H 。從第一個(gè)數(shù)碼管開始移位顯示，寫顯示RAM命令 OUT DX,AL RETINIT8279_1 ENDP。清除CLEAR PROC NEAR MOV DX,CMD_8279 MOV AL,0DEH 。 清除命令，將顯示RAM全部置1 OUT DX,ALWAIT1: IN AL,DX TEST AL,80H 。10000000B，寫顯示RAM，初始位為0000 JNZ WAIT1 。 顯示RAM清除完畢嗎? RETCLEAR ENDP。掃描SCAN_KEY PROC NEAR MOV DX,CMD_8279 IN AL,DX 。讀狀態(tài)READ_FIFO: AND AL,7 JZ NO_KEY 。是否有鍵按下READ: MOV AL,40H OUT DX,AL 。讀FIFO RAM，初始地址為000H MOV DX,DATA_8279 IN AL,DX STC 。有鍵SCAN_KEY1: RETNO_KEY: CLC 。無鍵按下，清CF JMP SCAN_KEY1SCAN_KEY ENDP。鍵值轉(zhuǎn)換KEY_NUM PROC NEAR AND AL,3FH 。00111111B清除高兩位,鍵值轉(zhuǎn)換為鍵號(hào) RETKEY_NUM ENDP。讀數(shù)據(jù)WRITE_DATA PROC NEAR MOV DX,DATA_8279 。DATA_8279為讀寫數(shù)據(jù)口的地址 OUT DX,AL RETWRITE_DATA ENDP。PCI卡初始化IfExit