inverting the maximite screen

Author	Message
BobDevries Senior Member Joined: 08/06/2011 Location: Australia Posts: 266	Posted: 09:31pm 08 Jun 2011         RossW said   Does that mean the XOR is faster ("slightly over 1 minute") than NOT ("1 minute 10 sec")? Can you read the video memory a byte-at-a-time, XOR with 255 (0xFF), write it back, and step a byte? That'd reduce the for-next loop 8-fold which should be almost an order of magnitude faster. (We're still talking about many seconds though). The NOT version is slightly faster. No only one pixel is accessible at a time using the pixel() function. There's no other way to access the screen RAM (or any other RAM). Regards, Bob Devries Dalby, QLD, Australia