According to the article the chip was clocked at 1 Mhz and only had 1 kilobit of storage, so you should be able to zero it out in a millisecond, less time than

According to the article the chip was clocked at 1 Mhz and only had 1 kilobit of storage, so you should be able to zero it out in a millisecond, less time than it takes to blit a single frame.