Game status

Ball A's state record, 16 bytes

Ball B's state, in the same fields as ball A's state.

Which axes the ball's move pass bounced on, and the bounce code each produced.

Which ball the physics act on this frame.

Whether ball B is in play, then the axis-step flags of the ball's current pass.

The two operands the overlap test compares.

Positions within the break animation and the brick-field sweep

What the secondary object holds, and whether the missile bat is up.

One arm flag per effect

The frame's pending points and each ball's combo

What struck the brick

What an inhabitant's attempted step ran into

The bee's sting

The ROM FRAMES counter. The sprite bank's capsule frame-1 slot runs through these three bytes.

Ball A's last recorded position and its idle frame count

The level in play and the lives the player has left.

The options-screen choices. The INERTIA rate has its own entry.

The INERTIA option, 1 to 9: the per-frame gain of the inertia accumulator

Bounces per ball-speed step.

A warp in progress.

The object pool: a count byte, then 9-byte sprite records. A record holds the sprite's position, its sprite pointer and its active flag.

Zero when silent, 1 when the prize-reveal tune is armed, and above 1 while it plays.

Per-brick state over the 9×9 field, two bytes per brick slot. The first is the class whose break animation the slot plays, or 0 for none. The second is its sub-frame counter. While a revealed glyph rests in the slot, the first holds the finished marker, or the slow ball glyph's loop class. The counter then times the glyph's lifetime.

Whether the live score has reached the high score: 0 for no, 1 for yes

The name-entry strip cell the cursor sits on.

Ten-thousands digit of the score at the last extra-life award

The step counters of four of the counted-step effects described at the sound primitive, one byte per effect.

The live control bits, then the input device.

The options-menu cursor, then the credits marquee's pixel phase and read pointer.

The tile-map cell that an object in motion probes.

The ball gem's movement state. No other secondary object uses it.

One 16-byte record per inhabitant slot, in the layout of the secondary object's logic record. Their sprite records are in the object pool.

Pointer to the next byte of the tune in play.

One tile code per character cell of the screen, in the attribute file's own order. Each row holds 32 cells, top row first.

One dirty counter per tile-map cell.