For all users of interfaces that include the CTR-05 counter timer board:
Originally this board was based on the AMD 9513 chip. About 2 years ago AMD stopped making this chip and Measurement Computing (formally known as Computer Boards Inc.) started using "compatible" chips made by other manufacturers. These chips have some bugs in them that cause various timimg problems when used with ProLase. Measurement Computing is working with the chip manufacturers to solve these problems. They have assured us that their goal is for the "compatibles" to work exactly the same as the original 9513. In the mean time they have aquired a supply of the original AMD 9513 chips for use by our customers. When you order the CTR-05 card (either ISA or PCI), please specify in your order that the card be shipped with a real AMD 9513. If you already have the CTR-05 with a "compatible" and are having problems with the marks, return the card to Measurement Computing and ask them to replace the chip.
Some of the symptoms with the "compatible" chips include missing vectors (whole or part), incorrect START SEG, incorrect FPS and problems marking bitmaps (greyscale and B/W modes). We have checked with other board manufactures, but they all have the same problem since they all had to start using the "Compatibles". Therefor we are going to stay with our recommendation of using Measurement