; Mermaids of Atlantis (U) - zero-page aliases.
;
; Pass 1 names every zero-page operand ZpXX; the names below are the
; semantic ones the dump proves.  An address whose role is the same at
; every reference is renamed everywhere; an address the game reuses for
; several roles keeps the neutral ZpXX name and is listed at the end.

ButtonState1     = $26 ; player 1 button bits, read from $4016
ButtonState2     = $27 ; player 2 button bits, read from $4017
PrevButton1      = $28 ; player 1 buttons of the previous frame
PrevButton2      = $29 ; player 2 buttons of the previous frame
NewButton1       = $2A ; player 1 buttons pressed this frame
NewButton2       = $2B ; player 2 buttons pressed this frame
PrgBankNumber    = $2C ; the MMC3 PRG bank the game switches to
HandlerIndex     = $2D ; the index the banked call dispatches on
IdleCounter      = $2F ; the counter the idle loop spins on
FrameCounter     = $31 ; the frame counter, incremented at the end of the NMI
ControllerBits   = $05 ; the eight button bits assembled by the pad reader
ControllerByte   = $07 ; the raw byte read from $4016/$4017
GameMode         = $6A ; the game mode flag (0 = playing, 1 = demo)

; ---------------------------------------------------------------------------
; The addresses below are used for more than one purpose in this dump, so
; they keep the neutral name.
;
;   $00-$01  the RAM-clear pointer (and the banked-call scratch)
;   $02      the PPUMASK shadow
;   $06      the PRG bank shadow in the banked call
;   $11-$14  indirect pointers: the VRAM pointer, the dispatch table pointer
;            and the sound table pointer share the two pairs
;   $19-$1F  scroll, sprite and bubble coordinates, reused per actor
;   $20-$2E  per-actor scratch: the tile, the position and the frame counters
;   $30-$3F  per-actor state: the sprite index, the direction and the timers
;   $40-$5F  the level script variables: the stage, the wave and the score
;   $60-$7F  the game state: the mode flags, the player state and the timers
;   $80-$9F  the same, for the second half of the image
;   $A0-$DF  the sound engine state
; ---------------------------------------------------------------------------

Zp2E    = $2E; storage with a role not yet unique enough for a behavioral name
Zp00    = $00; storage with a role not yet unique enough for a behavioral name
Zp01    = $01; storage with a role not yet unique enough for a behavioral name
Zp02    = $02; storage with a role not yet unique enough for a behavioral name
Zp03    = $03; storage with a role not yet unique enough for a behavioral name
Zp04    = $04; storage with a role not yet unique enough for a behavioral name
Zp06    = $06; storage with a role not yet unique enough for a behavioral name
Zp08    = $08; storage with a role not yet unique enough for a behavioral name
Zp09    = $09; storage with a role not yet unique enough for a behavioral name
Zp10    = $10; storage with a role not yet unique enough for a behavioral name
Zp11    = $11; storage with a role not yet unique enough for a behavioral name
Zp12    = $12; storage with a role not yet unique enough for a behavioral name
Zp13    = $13; storage with a role not yet unique enough for a behavioral name
Zp14    = $14; storage with a role not yet unique enough for a behavioral name
Zp15    = $15; storage with a role not yet unique enough for a behavioral name
Zp16    = $16; storage with a role not yet unique enough for a behavioral name
Zp17    = $17; storage with a role not yet unique enough for a behavioral name
Zp18    = $18; storage with a role not yet unique enough for a behavioral name
Zp19    = $19; storage with a role not yet unique enough for a behavioral name
Zp1A    = $1A; storage with a role not yet unique enough for a behavioral name
Zp1B    = $1B; storage with a role not yet unique enough for a behavioral name
Zp1C    = $1C; storage with a role not yet unique enough for a behavioral name
Zp1D    = $1D; storage with a role not yet unique enough for a behavioral name
Zp1E    = $1E; storage with a role not yet unique enough for a behavioral name
Zp1F    = $1F; storage with a role not yet unique enough for a behavioral name
Zp20    = $20; storage with a role not yet unique enough for a behavioral name
Zp21    = $21; storage with a role not yet unique enough for a behavioral name
Zp22    = $22; storage with a role not yet unique enough for a behavioral name
Zp23    = $23; storage with a role not yet unique enough for a behavioral name
Zp24    = $24; storage with a role not yet unique enough for a behavioral name
Zp25    = $25; storage with a role not yet unique enough for a behavioral name
Zp30    = $30; storage with a role not yet unique enough for a behavioral name
Zp32    = $32; storage with a role not yet unique enough for a behavioral name
Zp33    = $33; storage with a role not yet unique enough for a behavioral name
Zp34    = $34; storage with a role not yet unique enough for a behavioral name
Zp35    = $35; storage with a role not yet unique enough for a behavioral name
Zp36    = $36; storage with a role not yet unique enough for a behavioral name
Zp37    = $37; storage with a role not yet unique enough for a behavioral name
Zp38    = $38; storage with a role not yet unique enough for a behavioral name
Zp39    = $39; storage with a role not yet unique enough for a behavioral name
Zp3A    = $3A; storage with a role not yet unique enough for a behavioral name
Zp3B    = $3B; storage with a role not yet unique enough for a behavioral name
Zp3C    = $3C; storage with a role not yet unique enough for a behavioral name
Zp3D    = $3D; storage with a role not yet unique enough for a behavioral name
Zp3E    = $3E; storage with a role not yet unique enough for a behavioral name
Zp3F    = $3F; storage with a role not yet unique enough for a behavioral name
Zp40    = $40; storage with a role not yet unique enough for a behavioral name
Zp41    = $41; storage with a role not yet unique enough for a behavioral name
Zp42    = $42; storage with a role not yet unique enough for a behavioral name
Zp46    = $46; storage with a role not yet unique enough for a behavioral name
Zp47    = $47; storage with a role not yet unique enough for a behavioral name
Zp48    = $48; storage with a role not yet unique enough for a behavioral name
Zp49    = $49; storage with a role not yet unique enough for a behavioral name
Zp4A    = $4A; storage with a role not yet unique enough for a behavioral name
Zp4B    = $4B; storage with a role not yet unique enough for a behavioral name
Zp4C    = $4C; storage with a role not yet unique enough for a behavioral name
Zp4D    = $4D; storage with a role not yet unique enough for a behavioral name
Zp4E    = $4E; storage with a role not yet unique enough for a behavioral name
Zp52    = $52; storage with a role not yet unique enough for a behavioral name
Zp56    = $56; storage with a role not yet unique enough for a behavioral name
Zp58    = $58; storage with a role not yet unique enough for a behavioral name
Zp59    = $59; storage with a role not yet unique enough for a behavioral name
Zp5A    = $5A; storage with a role not yet unique enough for a behavioral name
Zp5B    = $5B; storage with a role not yet unique enough for a behavioral name
Zp5C    = $5C; storage with a role not yet unique enough for a behavioral name
Zp5D    = $5D; storage with a role not yet unique enough for a behavioral name
Zp5E    = $5E; storage with a role not yet unique enough for a behavioral name
Zp5F    = $5F; storage with a role not yet unique enough for a behavioral name
Zp60    = $60; storage with a role not yet unique enough for a behavioral name
Zp61    = $61; storage with a role not yet unique enough for a behavioral name
Zp62    = $62; storage with a role not yet unique enough for a behavioral name
Zp63    = $63; storage with a role not yet unique enough for a behavioral name
Zp64    = $64; storage with a role not yet unique enough for a behavioral name
Zp65    = $65; storage with a role not yet unique enough for a behavioral name
Zp66    = $66; storage with a role not yet unique enough for a behavioral name
Zp67    = $67; storage with a role not yet unique enough for a behavioral name
Zp68    = $68; storage with a role not yet unique enough for a behavioral name
Zp69    = $69; storage with a role not yet unique enough for a behavioral name
Zp6C    = $6C; storage with a role not yet unique enough for a behavioral name
Zp6E    = $6E; storage with a role not yet unique enough for a behavioral name
Zp6F    = $6F; storage with a role not yet unique enough for a behavioral name
Zp70    = $70; storage with a role not yet unique enough for a behavioral name
Zp71    = $71; storage with a role not yet unique enough for a behavioral name
Zp72    = $72; storage with a role not yet unique enough for a behavioral name
Zp73    = $73; storage with a role not yet unique enough for a behavioral name
Zp74    = $74; storage with a role not yet unique enough for a behavioral name
Zp75    = $75; storage with a role not yet unique enough for a behavioral name
Zp76    = $76; storage with a role not yet unique enough for a behavioral name
Zp78    = $78; storage with a role not yet unique enough for a behavioral name
Zp7E    = $7E; storage with a role not yet unique enough for a behavioral name
Zp80    = $80; storage with a role not yet unique enough for a behavioral name
Zp85    = $85; storage with a role not yet unique enough for a behavioral name
Zp86    = $86; storage with a role not yet unique enough for a behavioral name
Zp91    = $91; storage with a role not yet unique enough for a behavioral name
Zp93    = $93; storage with a role not yet unique enough for a behavioral name
Zp94    = $94; storage with a role not yet unique enough for a behavioral name
Zp95    = $95; storage with a role not yet unique enough for a behavioral name
Zp96    = $96; storage with a role not yet unique enough for a behavioral name
Zp97    = $97; storage with a role not yet unique enough for a behavioral name
Zp99    = $99; storage with a role not yet unique enough for a behavioral name
Zp9A    = $9A; storage with a role not yet unique enough for a behavioral name
Zp9D    = $9D; storage with a role not yet unique enough for a behavioral name
ZpA7    = $A7; storage with a role not yet unique enough for a behavioral name
ZpAF    = $AF; storage with a role not yet unique enough for a behavioral name
ZpB7    = $B7; storage with a role not yet unique enough for a behavioral name
ZpB9    = $B9; storage with a role not yet unique enough for a behavioral name
ZpBE    = $BE; storage with a role not yet unique enough for a behavioral name
ZpC8    = $C8; storage with a role not yet unique enough for a behavioral name
ZpC9    = $C9; storage with a role not yet unique enough for a behavioral name
ZpCA    = $CA; storage with a role not yet unique enough for a behavioral name
ZpCB    = $CB; storage with a role not yet unique enough for a behavioral name
ZpCC    = $CC; storage with a role not yet unique enough for a behavioral name
ZpCD    = $CD; storage with a role not yet unique enough for a behavioral name
ZpCE    = $CE; storage with a role not yet unique enough for a behavioral name
ZpCF    = $CF; storage with a role not yet unique enough for a behavioral name
ZpD0    = $D0; storage with a role not yet unique enough for a behavioral name
ZpD4    = $D4; storage with a role not yet unique enough for a behavioral name
ZpD5    = $D5; storage with a role not yet unique enough for a behavioral name
ZpD6    = $D6; storage with a role not yet unique enough for a behavioral name
ZpD7    = $D7; storage with a role not yet unique enough for a behavioral name
ZpD8    = $D8; storage with a role not yet unique enough for a behavioral name
ZpD9    = $D9; storage with a role not yet unique enough for a behavioral name
ZpDA    = $DA; storage with a role not yet unique enough for a behavioral name
ZpDB    = $DB; storage with a role not yet unique enough for a behavioral name
ZpDC    = $DC; storage with a role not yet unique enough for a behavioral name
ZpDD    = $DD; storage with a role not yet unique enough for a behavioral name
ZpDE    = $DE; storage with a role not yet unique enough for a behavioral name
ZpDF    = $DF; storage with a role not yet unique enough for a behavioral name
ZpE0    = $E0; storage with a role not yet unique enough for a behavioral name
ZpE2    = $E2; storage with a role not yet unique enough for a behavioral name
ZpE3    = $E3; storage with a role not yet unique enough for a behavioral name
ZpE7    = $E7; storage with a role not yet unique enough for a behavioral name