Christopher, On the Newhaven OLED you can use LCDOUT $fe,$08 to turn the OLED off and LCDOUT $fe, $0C to turn it back on, but this will not clear DDRAM. Once turned on again you will still have the same thing on your screen. There may be a better way but in some cases cycling power is the only way I have found to truly clear the screen. A poor, but sometime useful, fix for this problem in some cases is to write blanks to all locations as LCDOUT $fe, 1 doesn’t always work. I have also found that if there is a glitch during a command to the OLED the address gets scrambled and the OLED screen reads gibberish and can only be cleared by cycling power. Some of these problems are discussed on the Newhaven OLED forum. Your table below looks like the initialization routine which PBP is taking care of. I haven’t tried to write my own re-initialization routine for this OLED but I would be surprised if DDRAM would be cleared to give you a blank screen. I hope this is of some help.
Wayne