## Description
_TetRAM_ is a small, memory-resident (TSR) Tetris game: working around the
single-tasking nature of DOS, it loads itself into RAM and can be started
later at any time. The first commercial Tetris had already included such a
feature, but this version achieves other goals: a tiny memory footprint (4KB
plus change), and the ability to play _without_ suspending the background
program.
When invoked (from a 80×25 text-mode screen), the program greys out the
current background, and starts a Tetris game on top of it. The familiar rules
apply: falling blocks can be moved, rotated and arranged to create solid
horizontal lines across the pit; full lines are eliminated, and the pile must
be kept from growing all the way to the top.
The game keeps count of completed lines, and the more you score – the faster
it gets. Meanwhile the background program continues to run, and can even
receive input, except for the four cursor keys used by the game.
TetRAM