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POLine feed (0AH) messing up with video interrupt INT 10H
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12331528
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12331631
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1
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6
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CreationDate
2012-09-08T14:17:43.830
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0
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2012-09-08T15:04:20.843
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2012-09-08T14:35:06.950
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1656335
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1656335
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1
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0
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4081
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text
Body
I am trying to write a simply code that uses nested loop, prints the character in the following pattern, <pre><code>XXXXXXXXXX XXXXXXXXX XXXXXXXX XXXXXXX XXXXXX XXXXX XXXX XXX XX X </code></pre> and here is the code, and The code works absolutely fine <pre><code> MOV AX, @DATA ; INITIALIZE DS MOV DS, AX ; PRINT X MOV CX,10 MOV BX,10 L2: PUSH CX MOV CX,BX L1: MOV DX, OFFSET HW ; LOAD THE STRING MOV AH,09H INT 21H Loop L1 SUB BX,01 POP CX MOV DX,0AH MOV AH,02H INT 21H Loop L2 MOV AH, 4CH ; RETURN CONTROL TO DOS INT 21H </code></pre> but as soon as i use clear screen using video interrupt the output completely mess up, Here is the output, <pre><code>XXXXXXXXXX XXXXXXXXX XXXXXXXX XXXXXXX XXXXXX XXXXX XXXX XXX XX X </code></pre> and here is the code for it, <pre><code>.MODEL SMALL .STACK 100H .DATA HW DB "X$" .CODE MAIN PROC MOV AX, @DATA ; INITIALIZE DS MOV DS, AX ; CLEAR SCREEN MOV AH, 06H MOV AL, 00H MOV CX, 00H MOV DH, 25 MOV DL, 80 MOV BH, 0FH INT 10H ; PRINT X MOV CX,10 MOV BX,10 L2: PUSH CX MOV CX,BX L1: MOV DX, OFFSET HW ; LOAD THE STRING MOV AH,09H INT 21H Loop L1 SUB BX,01 POP CX MOV DX,0AH MOV AH,02H INT 21H Loop L2 MOV AH, 4CH ; RETURN CONTROL TO DOS INT 21H MAIN ENDP END MAIN </code></pre> but when i remove the line feed that leave a line after each iteration, i.e <pre><code>MOV DX,0AH MOV AH,02H INT 21H </code></pre> the output is following as expected, <pre><code>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX </code></pre> I donot understand what the clear screen code has to do with the line feed code ? why they are messing up with each other. ? Same issue occur when i am using Cursor Position set code instead of clear screen, <pre><code>MOV AH, 02H MOV BH, 00H MOV CX, 0000H MOV DX, 0C22H INT 10H </code></pre> The output suppose to be the following in the middle of my screen, <pre><code>XXXXXXXXXX XXXXXXXXX XXXXXXXX XXXXXXX XXXXXX XXXXX XXXX XXX XX X </code></pre> but it is displaying as below, <pre><code> XXXXXXXXXX XXXXXXXXX XXXXXXXX XXXXXXX XXXXXX XXXXX X XX XXX XX X </code></pre>
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<assembly><x86><interrupt>
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Line feed (0AH) messing up with video interrupt INT 10H
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