Programming Forums > Application Development > Assembly

samra · Mar 2nd, 2005, 11:36 PM

hello
in interfacing the PC through parrallel port 25 pin, what is wrong with windows 2000 & the outpot pins?
if i am outputing the decima

l sequence from 0--9 to a seven segment display, & using Windows 2000 as OS, Turbo pascal as editor, assembly language for 8088/8086 microprocessor. the numbers are coming out but not in the right order, is this due to a problem with Win2000, (this was working well with Win95 & Win98).
& if iam using the input & output together, then there would be no problem.
is this right, or there might be another reason?

liquidsilver · Mar 11th, 2005, 3:32 PM

Can you help try by showing the code you used?

samra · Mar 13th, 2005, 10:28 PM

(Toggle Plain Text)

MOV DX,3BCH
@START:  SUB AL,AL                ;so AL=0
@NEXT:    OUT DX,AL
               CALL @DELAY
               INC AL                    ;AL=AL+1
               CMP AL,10
               JZ  @START            ;if AL=10 go to start
               JMP @NEXT             if AL not equal 10, then output it to display
@DELAY:   PUSH AX                                                       
               PUSH BX                                                       
               PUSH CX                                                       
               MOV AX,9                                                      
@LOOP1:   DEC AX                                                       
               CMP AX,-1                                                     
               JZ @EXIT                                                     
               MOV BX,0FFFH                                             
@LOOP2:   DEC BX                                                     
               JZ @LOOP1                                                     
               MOV CX,0FFFH                                                  
@LOOP3:   DEC CX                                                        
               JNZ @LOOP3                                                    
               JMP @LOOP2                                                    
@EXIT:     POP CX                                                        
               POP BX                                                        
               POP AX                                                        
               RET

liquidsilver · Mar 15th, 2005, 3:12 AM

Not sure what's wrong there, can't see anything that would be influenced by the OS. Try debugging it.

Xero · Mar 15th, 2005, 9:05 AM

Quote:

Originally Posted by samra

what is wrong with windows 2000

microsoft

samra · Mar 16th, 2005, 5:43 AM

Very lovely, very nice. Thank you very much for passing by. & thanku for mentioning Microsoft, i forgot totally about it.

ilove this forum

Mar 2nd, 2005, 11:36 PM	#1
samra Newbie Join Date: Feb 2005 Posts: 11 Rep Power: 0	assembly & interfacing,what's wrong with Win2000 hello in interfacing the PC through parrallel port 25 pin, what is wrong with windows 2000 & the outpot pins? if i am outputing the decima l sequence from 0--9 to a seven segment display, & using Windows 2000 as OS, Turbo pascal as editor, assembly language for 8088/8086 microprocessor. the numbers are coming out but not in the right order, is this due to a problem with Win2000, (this was working well with Win95 & Win98). & if iam using the input & output together, then there would be no problem. is this right, or there might be another reason?

Mar 11th, 2005, 3:32 PM	#2
liquidsilver Newbie Join Date: Mar 2005 Location: South Africa Posts: 21 Rep Power: 0	Can you help try by showing the code you used? __________________ Small is beautiful

Mar 13th, 2005, 10:28 PM	#3
samra Newbie Join Date: Feb 2005 Posts: 11 Rep Power: 0	Sure (Toggle Plain Text) MOV DX,3BCH @START: SUB AL,AL ;so AL=0 @NEXT: OUT DX,AL CALL @DELAY INC AL ;AL=AL+1 CMP AL,10 JZ @START ;if AL=10 go to start JMP @NEXT if AL not equal 10, then output it to display @DELAY: PUSH AX PUSH BX PUSH CX MOV AX,9 @LOOP1: DEC AX CMP AX,-1 JZ @EXIT MOV BX,0FFFH @LOOP2: DEC BX JZ @LOOP1 MOV CX,0FFFH @LOOP3: DEC CX JNZ @LOOP3 JMP @LOOP2 @EXIT: POP CX POP BX POP AX RET MOV DX,3BCH @START: SUB AL,AL ;so AL=0 @NEXT: OUT DX,AL CALL @DELAY INC AL ;AL=AL+1 CMP AL,10 JZ @START ;if AL=10 go to start JMP @NEXT if AL not equal 10, then output it to display @DELAY: PUSH AX PUSH BX PUSH CX MOV AX,9 @LOOP1: DEC AX CMP AX,-1 JZ @EXIT MOV BX,0FFFH @LOOP2: DEC BX JZ @LOOP1 MOV CX,0FFFH @LOOP3: DEC CX JNZ @LOOP3 JMP @LOOP2 @EXIT: POP CX POP BX POP AX RET

Mar 15th, 2005, 3:12 AM	#4
liquidsilver Newbie Join Date: Mar 2005 Location: South Africa Posts: 21 Rep Power: 0	Not sure what's wrong there, can't see anything that would be influenced by the OS. Try debugging it. __________________ Small is beautiful

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Mar 16th, 2005, 5:43 AM	#6
samra Newbie Join Date: Feb 2005 Posts: 11 Rep Power: 0	Very lovely, very nice. Thank you very much for passing by. & thanku for mentioning Microsoft, i forgot totally about it. ilove this forum

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Programming Forums > Application Development > Assembly

assembly & interfacing,what's wrong with Win2000