CompuServe Messages

Steve, the black border is NOT an artifact of the flickerFixer. The A1950 monitor has an overscan switch which eliminates the border with the flickerFixer or any other system which uses the same principle as the flickerFixer such as the A3000 or the A2320. The A1950 is one of the very few monitors which is able to expand the image horizontally so as to eliminate the black border. With most monitors a border is visible with the flickerFixer, the A3000 or any other high scan rate display system. Computer displays which operate at the TV scan rate of 15.75 KHz behave like TV; the image bleeds off the edge of the screen. IBM CGA and the standard Amiga display are examples of this. The reason that other displays do not behave this way is that it is virtually impossible to properly converge an overscanned high resolution display which operates at a high scan rate. In addition, pincusion distortion is usually unacceptable. Every A1950 I have seen shows these problems when set for overscan. I doubt that the monitor was originally designed to operate with such a large horizontal scan angle. There may be some confusion due to the fact that the flickerFixer limits the horizontal display to approximately 716 pixels. This is necessary in order to be compatible with the current model Denise chip. When used with the current Denise, the A2320 displays a moving jagged edge on the right edge of the display. To obtain an acceptable display with the A2320, either it must be used with a monitor which hides the right edge of the display or the ECS Denise must be installed. However, the ECS Denise chip has not been released and is not yet available to A2000 owners. When the ECS Denise is released, Microway will probably sell a replacement PAL chip to permit a wider display. For most users, however, I believe that the expense of the new Denise will not be justified. Peter.