Is the magnitude of intelligence on the planet really a constant magnitude, otherwise (how?!) could not do the simplest check for the correctness of the data entered from the keyboard? Even on Spectrum, this was resolved in a couple of lines of Basic, where 48kB of RAM and 7kB of video card! But here is the cursor (shooter like in Windows) I wrote for three months. From Zero. In the assembly. Remembering what was on the screen before it, and restoring the image after it was moved, as there were no layers in the memo. Going into the screen of the TV so that it does not flash and move smoothly. Sorry for logging into this book forum with your computers. Continue to.