Scrolling the screen - ASM

[matio]

When you scroll the screen up it moves each line up, but this means the that data is lost. Is there a way for it to keep everything that has been on the screen (buffer)?

[ru2aqare]

When you scroll the screen up it moves each line up, but this means the that data is lost. Is there a way for it to keep everything that has been on the screen (buffer)?

The answer is exactly that - a buffer that contains the lines you've scrolled out of the screen. Of course to keep everything you would need infinity amounts of memory, so you can keep things "on screen" only until you run out of memory.

[quanganht]

Simple: copy the (n+1)th to the nth line, clear the last line.

[matio]

@ru2aqare
thanks!

@quanganht
erm, sorry not sure what you mean

[Creature]

@ru2aqare
thanks!

@quanganht
erm, sorry not sure what you mean

quanganht just gave you a way to scroll to the screen, but did not answer your question. The answer is indeed what ru2aqare said. I guess the best way would be to either dynamically allocate a buffer (you could even allow the user to specify how many lines of history must be remembered) or you could just use a static buffer (of however many lines you wish to remember), but this might increase executable size considerably.

[matio]

Thanks everyone. Seen as I'm doing this in asm I will probaly have to use a file.

[Dex]

Yes, you need to treat it as a file (eg: with 10, 13, at end of each string ), you should take a look at asm editors like Tex4u, fasms dos editor or small dos one's like these http://texteditors.org/cgi-bin/wiki.pl?TinyEditors
Teds a good small one : http://texteditors.org/cgi-bin/wiki.pl?TEDNASM

[quanganht]

@quanganht
erm, sorry not sure what you mean

Oops. I thought u only asked about scrolling.