Screen scroll value (NBG0, horizontal integer part)

Screen scroll value (NBG0, horizontal fractional part)

Screen scroll value (NBG0, vertical integer part)

Screen scroll value (NBG0, vertical fraction)

Coordinate increment (NBG0, horizontal integer part)

Coordinate increment (NBG0, horizontal fractional part)

Coordinate increment (NBG0, integer part in the vertical direction)

Coordinate increment (NBG0, vertical fraction)