PS/2 mouse bug

Issue
In versions of Doom prior to V1.666, Some PC configurations would cause the player to move erratically, including, but not limited to, spinning in place upon moving the mouse, firing at random intervals, or moving forward.

Cause
The cause was determined to be input related, and was fixed in later versions. Note that this is not similar to the Logitech Mouse Driver bug, whereas the bug was in the mouse driver, not Doom. It is recommended to use CuteMouse to fix these errors in DOS.