Also, it's 49152. System variables were irrelevant after loading if you never called into ROM, but yes, that 6912 byte display block was fundamental. However s

Also, it's 49152. System variables were irrelevant after loading if you never called into ROM, but yes, that 6912 byte display block was fundamental. However some games and demos did steal a kb or two by using only a part of the screen and masking the rest with black on black color attributes.