NANOSAURUS
Programmer
Hi, I was wondering....How do I scroll in assembly. Also where in the buffer does the scrolled up/dn part of the page go.
Thanks in advance....NANOSAURUS
Thanks in advance....NANOSAURUS
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Scrolling in Assembly
- Thread starter NANOSAURUS
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zBuilder
MIS
You can scroll a DOS text screen by calling int10h with AH = 06h to scroll the page up, or AH = 07h to scroll the page down. The value in AL is the number of lines to scroll.
BH = character for 'blank lines'
CH & CL = row and column of upper left corner
DH & CL = row and column of lower right corner
See Ralph Browns interupt list for more stuff....
Kim_Christensen@telus.net
BH = character for 'blank lines'
CH & CL = row and column of upper left corner
DH & CL = row and column of lower right corner
See Ralph Browns interupt list for more stuff....
Kim_Christensen@telus.net
BH=ATTRIBUTE for blank lines, not character.
The scrolled out portion is thrown away.
NOTES:
To clear out the window, set al=0. You may set it so that al>number of rows, but some BIOS implementations don't handle that properly. al=0 is slow on some implementations, but some check for that condition and immediately clear out the window. al=0 is the most portable if you want to clear a portion of the screen.
The scrolled out portion is thrown away.
NOTES:
To clear out the window, set al=0. You may set it so that al>number of rows, but some BIOS implementations don't handle that properly. al=0 is slow on some implementations, but some check for that condition and immediately clear out the window. al=0 is the most portable if you want to clear a portion of the screen.
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