double line single line PMBASE Unused +180 +300
-- M2 M0 M1 M3 +200 +400 Player 0 ==>
-- -- -- -- -- -- -- -- -- -- P0 M2 M0 P1 P2 M1 P3 M3 ==> +280 +500 Player 1
-- +300 +600 Player 2
-- +380 +700 Player 3
-- +400 +800
Horizontal position for each object is set independently by 8 horizontal position registers (in the GTIA).
Each section of memory maps directly onto total height of TV screen. Object vertical position is determined only by its location in its section of memory. One byte of memory equals 1 or 2 television lines vertically.