From http://www.gamearchive.com You may distribute this document freely as long as this header remains intact. This mod will increase the overall speed of your asteroids game. You will need some 30 gauge wire and a switch. 1. Clip and lift pin 4 of C5 (74LS161) 2. Wire switch as follows: * Common to lifted pin 4 * Normally closed to pad where pin 4 used to be connected * normally open to pull up resistor next to C5 NOTE: 1. Be sure you wire the end of the pull-up resistor *not* tied to +5V. 2. Clipping any other pins besides pin 4 may have adverse effects on Audio, Video, and/or coin discrimination. --