March 1998. These files have 1ms delays built into them so they will work on a Pentium computer. If you are using a slower computer the delays may be removed. Look for the delay(1) and take them out. Some 80486 computers will also require the delay. You will know you need the delay if you enter din x and get a 1 when nothing is connected to the input. Or you do an anin x and get over 2V written to the screen when nothing is connected. The K93 documentation is Word 6 format. The schematic in Protel format. DIY ELECTRONICS ---------------