-Address- 0 1 2 3 4 5 6 7
0000-3FFF RAM_0 RAM_0 '''RAM_4 ''' RAM_0 RAM_0 RAM_0 RAM_0 RAM_0 4000-7FFF RAM_1 RAM_1 '''RAM_5 ''' '''RAM_3 ''' '''RAM_4 ''' '''RAM_5 ''' '''RAM_6 ''' '''RAM_7''' 8000-BFFF RAM_2 RAM_2 '''RAM_6 ''' RAM_2 RAM_2 RAM_2 RAM_2 RAM_2 C000-FFFF RAM_3 '''RAM_7 ''' '''RAM_7 ''' '''RAM_7 ''' RAM_3 RAM_3 RAM_3 RAM_3
The Video RAM is always located in the first 64K, VRAM is in no way affected by this register.