Assembly : Side Scrolling

[snake]

Hey Guys,

Does anyone have some code for side scrolling in Assembler?

I've written a nested loop routine that does this, it works but it's slow.
Loop One Screen
Loop One Column
Loop One Row
Move One Character Left
End_Loop
End_Loop
End_Loop

[someone]

G'Day Snake,

For this the adventure is the journey; so someone will leave this as an interesting challenge for you; suffice it to say that in its most efficient form you'll only need to reconfigure the 6545 CRT controller and update a single column of characters.

[snake]

Will this work for horizontal scrolling?

[someone]