| ??? 08/15/08 01:05 Read: times |
#157495 - Looking at the code... Responding to: ???'s previous message |
Your code does a cjne to test for equality etc which is effectively a substraction which you do next anyway. Kill two birds with one stone.
; GET DIFFERNCE BETWEEN OLD AND NOW GETDIFFERENCE: MOV A,R1 ;R1 IS OLD CJNE A, R0, CheckLess ;SEE IF SAME ERROR IS HERE JMP MAIN ;OLD & NEW ARE SAME CheckLess: JC OldLessThanNow ;R0 is less than R1 ****** this is doing much the same save the cjne above****** OldGreaterThanNow: MOV A,R1 SUBB A, R0 ******* put test in here *************** MOV R5,A ;R5 = # OF TIMES TO RUN LOOP MOV A,R0 ;R0 = NOW MOV R1,A ;R1 = OLD ;NOW SET DI BIT AND RUN LOOP FOR A# OF TIMES SETB DI DJNZ R5,LOOP JMP MAIN OldLessThanNow: MOV A,R0 SUBB A, R1 MOV R5,A ; R5 = # OF TIMES TO RUN LOOP MOV A,R0 ;R0 = NOW MOV R1,A ;R1 = OLD ;NOW SET DI BIT AND GO TO LOOP FOR A# OF TIMES CLR DI DJNZ R5,LOOP JMP MAIN |
| Topic | Author | Date |
| cjne w/ 2 registers? | 01/01/70 00:00 | |
| think i found it | 01/01/70 00:00 | |
| cjne | 01/01/70 00:00 | |
| there is nothing particularly weird about 805x | 01/01/70 00:00 | |
| I ran this through the simulator ... | 01/01/70 00:00 | |
| Looking at the code... | 01/01/70 00:00 | |
| SUBB and carry | 01/01/70 00:00 | |
Thank You | 01/01/70 00:00 |