ç¨åçæºå®ç°å¤åèé¤æ³ä¸è¬éç¨é¨åä½æ°å·¦ç§»ç®æ³ï¼ç¨åºå·²ç»ç»ä½ ç¼å¥½äºï¼åä½ çè¦æ±ç¨å¾®æç¹ä¸åï¼æ§è¡å®åååå¨å¨åæ¥è¢«é¤æ°çä½ç½®ï¼å³53H52H51H50Hãè¿æ¯é¨åä½æ°å·¦ç§»ç®æ³çç¹ç¹å³å®çï¼åæ¶ä¹å¯ä»¥èçå
åï¼å¦æä¸å®è¦å°ååå¨å°77H76H75H74Håªéè¦å¨è¿åæ令RETåå¢å 4æ¡ä¼ éæ令å³å¯ï¼
MOV 77H,53H
MOV 76H,52H
MOV 75H,51H
MOV 74H,50H
å
³äºé¨åä½æ°å·¦ç§»ç®æ³çå·¥ä½åçå
¶å®åæ们åç«å¼åé¤æ³æ¯ä¸æ ·çï¼æç
§ä»é«å°ä½ä¸ä½ä¸ä½çå被é¤æ°åé¤æ°æ¯è¾ï¼ä¸åçæ¯åè¿å¶é¤æ³æ¯ä½ç¸é¤çç»ææ0~9åç§å¯è½ï¼èäºè¿å¶ååªæ0å1两ç§æ
åµï¼é£ä¹ä¸å¼å§å°ä½æ°åå¨åå
å
¨é¨æ¸
é¶ï¼ç¶åä½æ°å被é¤æ°ä¸èµ·å·¦ç§»ä¸ä½ï¼å°±åå¾äºè¢«é¤æ°çæé«ä½å°ä½æ°åå¨åå
ä¸ï¼è¿æ¶å°ä½æ°ï¼ä¹å°±æ¯è¢«é¤æ°çæé«ä½ï¼åé¤æ°æ¯è¾ï¼å°äºä¸0ï¼å¤§äºåä¸1ï¼ç¶åå移ä½ï¼æ ¹æ®è¢«é¤æ°çä½æ°å¾ªç¯32次å³å¯å®æé¤æ³è¿ç®ãå
·ä½è¿ç¨ä½ å¯ä»¥éè¿ä¸ä¸ªå®ä¾èªå·±æ¨ç®ä¸ä¸ï¼ç¨åºå°±å¾å®¹æçæäºã
;******************************************************************
;51åçæºé¤æ³ è¿ç® æ±ç¼è¯è¨ç¨åº
;éç¨é¨åä½æ°å·¦ç§»ç®æ³
;被é¤æ°,åï¼ 53H52H51H50H
;é¤æ°: 43H42H41H40H
;ä½æ°: 73H72H71H70H
;åæ³ç»ææåï¼57H56H55H54H
;******************************************************************
DIVIDE:
MOV 70H,#00H ;ä½æ°åå¨åå
æ¸
é¶
MOV 71H,#00H
MOV 72H,#00H
MOV 73H,#00H
MOV R3,#32 ;循ç¯æ¬¡æ°ï¼è¢«é¤æ°æ»å
±32ä½
DIVLP0: CLR C ;ä½æ°å被é¤æ°ä¸èµ·å·¦ç§»ä¸ä½
MOV A,50H
RLC A
MOV 50H,A
MOV A,51H
RLC A
MOV 51H,A
MOV A,52H
RLC A
MOV 52H,A
MOV A,53H
RLC A
MOV 53H,A
MOV A,70H
RLC A
MOV 70H,A
MOV A,71H
RLC A
MOV 71H,A
MOV A,72H
RLC A
MOV 72H,A
MOV A,73H
RLC A
MOV 73H,A
DIVSUB: CLR C ;ååæ³ï¼ä½æ°-é¤æ°
MOV A,70H ;73H72H71H70H-43H42H41H40H->57H56H55H54H
SUBB A,40H
MOV 54H,A
MOV A,71H
SUBB A,41H
MOV 55H,A
MOV A,72H
SUBB A,42H
MOV 56H,A
MOV A,73H
SUBB A,43H
MOV 57H,A
JC DIV2 ;å¦æä½æ°æ¯é¤æ°å°ï¼åä¸0ï¼è¿ä¸æ¥å¨ç§»ä½æ¶å·²ç»å®æäºï¼
INC 50H ;å¦åä¸1
MOV 73H,57H ;并æ´æ°ä½æ°
MOV 72H,56H
MOV 71H,55H
MOV 70H,54H
DIV2: DJNZ R3,DIVLP0 ;循ç¯32次ï¼
RET
追é®ä¸å¯ä»¥åï¼53Håä½ï¼æ¯ä¸æ¯åäº
追çä½ çæææ¯53H52H51H50Håå«æ¯è¢«é¤æ°çåç¾å个ä½ï¼43H42H41H40Hæ¯é¤æ°çåç¾å个ä½ï¼BCDç æ°ï¼é£å°±æ¯è¾éº»ç¦äºãå¤åèé¤æ³å¿
é¡»æ¯ç¨äºè¿å¶è®¡ç®çï¼å
·ä½ç¨åºæå°±ä¸åäºï¼æ¹æ³å¦ä¸ï¼
1. å°è¢«é¤æ°ï¼é¤æ°è½¬æ¢ä¸ºäºè¿å¶æ°ã
2. ç¨é¨åä½æ°å·¦ç§»ç®æ³è®¡ç®é¤æ³ãï¼åèä¸é¢çç¨åºï¼
3. å°ç»æï¼äºè¿å¶ï¼å转æ¢ä¸ºåè¿å¶æ°ã