rubin@mead.UUCP (Daniel Rubin) (08/24/90)
I have a couple of technical questions.. How does a computer generate the video representation of screen memory? How does a computer update the memory that is used for the screen? I was thinking and I got stuck when I thought about a 25Mhz (fast!) processor. It seems to me that a the most memory that this processor can update at 60Hz or 60 times a second (which if I am not mistaken is the speed that a television redraws its picture and monitors are even faster) is only .417 Megabytes??? Is this correct - the most graphical data that you can malipulate is less than 1/2 of a Meg at the normal speeds of a typical television when you are using a 25Mhz processor dedicated to graphics? Is there something that I am missing - perhaps there is some sort of co-processor or something. Anybody out there who knows something about microprocessors ect.. please help me out.......... Thanks in Advance - Dan Rubin