Hi. I have an IBM 5151 monitor connected to an IBM 6150. When the system starts, the image looks in triplicate: I know nothing about the 6150 series but the 5151 monitor is for MDA and that card is rather unusual - it has 50Hz vertical refresh rate. So my guess is you are just not getting a lock, …

Hello! Hi. I have an IBM 5151 monitor connected to an IBM 6150. When the system starts, the image looks in triplicate: https://photos.app.goo.gl/WyRNK3tb3vgq9WGi9 https://photos.app.goo.gl/WyRNK3tb3vgq9WGi9 But when you load the RAM, the image is fixed. I think it's because of the DCMON.COM command …