Basic terminal

[bytorbrynden]

The initial TTY (terminal), will build upon the existing VGA text-mode "helper", and will be fairly simple.
To start, we will rely upon the terminal mostly for vertical scrolling.

In the future, however, the terminal will also be tasked with accepting user input (via a USB keyboard).
From this, we could eventually build simple command-shells.

[Vild]

If you want to make the terminal less "bad" you should do all the scrolling and slicing of the text before you start printing it to the screen.

For example if the string you are supposed to write is longer than 25 it should just clear the screen and write 25 lines counted from the bottom.

Examples from PowerNex:
https://github.com/Vild/PowerNex/blob/master/Kernel/src/IO/FS/IO/Console/Screen/VirtualConsoleScreen.d#L52

https://github.com/Vild/PowerNex/blob/master/Kernel/src/IO/FS/IO/Console/Screen/VirtualConsoleScreen.d#L141