SSD1306 OLED (72x40) I2C display from scratch

[richard]

Richard, how did you come to this $68 value please? I can't figure it out

the info supplied with the display makes calculating the value somewhat difficult . in fact i cannot see the connection at all

the command basically sets where the memory line representing page 0 bit 0 maps to the physical display top row pixels, it can be vertically offset by 0 to 63 pixels in a virtually identical way to the way the display scrolls horizontally

it needed to be offset by -23 pixels to get the top row to align with page 0 bit 0

command range = 0x40 to 0x7f , 0x7f - 23 = 0x68