midkiff@portia.Stanford.EDU (Neil Midkiff) (08/24/90)
In article <1211@meaddata.mead.UUCP> mead!rubin@uccba.uc.edu writes: >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