Firebird 2 User’s Guide
Chapter 7 – Troubleshooting
5.
Your CPU speed could be too fast for your software and game card.
Some games and game cards provide inadequate joystick support for faster
computers. Try using your computer in non-Turbo mode (if your computer has
a Turbo mode). If this doesn’t solve the problem, try a speed-compensating
game card.
...Controls Are Erratic or Don’t Work, cont’d.