memory.s

                include defines.s
                include macros.s

        ; Zeropage variables

                varbase $02

                var loadBufferPos               ;Loader variables. Note: order is important, used for selfmod optimization code
                var loadTempReg
                var fileOpen
                var ntscFlag
                var loaderMode
                var fileNumber                  ;Not needed by loader, but used by main code to remember the file currently accessed

                var zpLenLo                     ;Exomizer 3 depackroutine variables
                var zpSrcLo
                var zpSrcHi
                var zpDestLo
                var zpDestHi
                var zpBitsLo
                var zpBitsHi
                var zpBitBuf

zpLenHi         = zpBitsLo                      ;Exomizer 3 doesn't use zpBitsLo, but the engine uses it as an extra pointer / counter

                var xLo                         ;Actor render / spawn coordinates
                var yLo
                var xHi
                var yHi

                var cacheFrame                  ;Sprite render variables
                var sprFrameNum
                var numSpr
                var numBounds
                var actColorAnd
                var actColorOr
                var actYMSB

                var actIndex                    ;Actor variables
                var actLo
                var actHi
                var currFlags
                var wpnLo
                var wpnHi
                var wpnFlags

                var loadRes                     ;Current resource file for load
                var freeMemLo                   ;Memory allocator variables
                var freeMemHi
                var musicDataLo
                var musicDataHi
                var zoneBufferLo
                var zoneBufferHi

                var nextLvlActIndex             ;Misc. game vars

                varrange actXH,MAX_ACT          ;Actor ZP variables
                varrange actYH,MAX_ACT
                varrange actSX,MAX_ACT
                varrange actSY,MAX_ACT
                varrange actF1,MAX_ACT

                checkvarbase $90

                varbase $a6

                var joystick                    ;Input variables
                var prevJoy
                var keyType

                var levelNum                    ;Zone / level variables
                var zoneNum
                var mapSizeX
                var mapSizeY
                var zoneBg1
                var zoneBg2
                var zoneBg3
                var lastNavArea

                var animObj                     ;Levelobject variables. First 3 also used in zone init
                var animObjFrame
                var animObjTarget
                var usableObj
                var autoDeactObj
                var atObj

                checkvarbase $b7

                varbase $c0

                varrange sprOrder,MAX_SPR+1

                var scrollX                     ;Scrolling variables
                var scrollY
                var scrollSX
                var scrollSY
                var scrCounter
                var blockX
                var blockY
                var mapX
                var mapY

                var textTime                    ;Text printing variables
                var textLeftMargin
                var textRightMargin
                var textLo
                var textHi

                var irqSaveA                    ;IRQ variables
                var irqSaveX
                var irqSaveY
                var frameNumber
                var firstSortSpr
                var newFrameFlag
                var drawScreenFlag
                var dsBlockX
                var dsBlockY
                var dsStartX
                var dsEdgeX
                var dsTopPtrLo
                var dsTopPtrHi
                var dsBottomPtrLo
                var dsBottomPtrHi

                var pattPtrLo                   ;Playroutine
                var pattPtrHi
                var trackPtrLo
                var trackPtrHi
                var masterVol
                var sfxTemp

                checkvarbase $100

textCursor      = loadBufferPos                 ;Reused during text printing (should never load mid-line!)

dataSizeLo      = xHi                           ;Reused during resource load
dataSizeHi      = yHi

zoneCharset     = animObj                       ;Reused during zone init
zoneDataOffsetLo = animObjFrame
zoneDataOffsetHi = animObjTarget

complexSprCount = xHi                           ;Reused during actor render
complexSprTemp  = yHi
oldSprLo        = wpnLo
oldSprHi        = wpnHi
oldSprHeaderLo  = loadBufferPos
oldSprHeaderHi  = loadTempReg
cacheAdr        = wpnLo
sliceMask       = wpnHi

currFireCtrl    = xLo                           ;Reused during actor move / attack
currCtrl        = yLo
edgeCtrl        = xHi
moveSpeed       = yHi
sideOffset      = zpBitsLo
topOffset       = zpBitsHi
slopeX          = zpBitBuf
saveActIndex    = actColorAnd
saveHp          = actColorOr

blockCtrl       = xHi                           ;Reused during attack
aimDir          = zpBitsLo
bulletDir       = zpBitsHi
wpnFlagsDisp    = loadBufferPos

bounceBrake     = yLo                           ;Reused during bounce physics
bouncePrevX     = xHi
bouncePrevY     = yHi

signXDist       = xLo                           ;Reused during AI
absXDist        = xHi
signYDist       = yLo
absYDist        = yHi
targetX         = zpSrcLo
targetY         = zpSrcHi
srcNavArea      = zpDestLo
currentDist     = zpDestHi
bestDist        = zpBitsLo
bestArea        = zpBitsHi
aggression      = zpLenLo

bboxTop         = zpBitsLo                      ;AI firing dir check
bboxBottom      = zpBitsHi
wpnHeight       = zpBitBuf

lineX           = xLo                           ;Reused during linecheck
lineY           = yLo
lineYCopy       = xHi
lineSlope       = yHi
lineCount       = zpBitsLo

aoEndFrame      = xLo                           ;Object animation
aoTemp          = yLo

promptIndex     = xLo                           ;Interaction prompts
promptType      = yLo

        ; Memory areas and non-zeropage variables

depackBuffer    = $0100
loadBuffer      = $0200
StopIrq         = $02a7                         ;Kernal load/save preparation: disable IRQs / blank screen if necessary

exomizerCodeStart = $0334

scriptCodeRelocStart = $8000
videoBank       = $c000
fileAreaEnd     = $d000
spriteCache     = $d000
colors          = $d800
panelScreen     = $e000
panelChars      = $e000
blkTL           = $e400
blkTR           = $e500
blkBL           = $e600
blkBR           = $e700
chars           = $e800
blkInfo         = $f000
blkColors       = $f100
lvlObjAnimFrames = $f200
charAnimCodeJump = $f2bd
miscVarArea1    = $f2c0
screen          = $f800
emptySprite     = $fc00
miscVarArea2    = $fc40

                varbase panelScreen+24*40-1
                varrange sprY,MAX_SPR+1
                varrange boundsAct,MAX_BOUNDS
                checkvarbase panelScreen+1016

                varbase screen+SCROLLROWS*40
                varrange sprX,MAX_SPR
                varrange sprF,MAX_SPR
                varrange sprC,MAX_SPR
                varrange sprAct,MAX_SPR
                checkvarbase screen+1016

                varbase miscVarArea1

        ; Level objects

                varrange lvlObjX,MAX_LVLOBJ
                varrange lvlObjY,MAX_LVLOBJ
                varrange lvlObjZ,MAX_LVLOBJ
                varrange lvlObjFlags,MAX_LVLOBJ
                varrange lvlObjSize,MAX_LVLOBJ
                varrange lvlObjFrame,MAX_LVLOBJ
                varrange lvlObjDL,MAX_LVLOBJ
                varrange lvlObjDH,MAX_LVLOBJ

        ; Leveldata actors

                varrange lvlActX,MAX_LVLACT
                varrange lvlActY,MAX_LVLACT
                varrange lvlActZ,MAX_LVLACT
                varrange lvlActT,MAX_LVLACT
                varrange lvlActWpn,MAX_LVLACT
                varrange lvlActOrg,MAX_LVLACT

                varbase miscVarArea2

        ; Sprite caching & resources

                varrange fileNumObjects,MAX_CHUNKFILES
                varrange cacheSprAge,MAX_CACHESPRITES
                varrange cacheSprFrame,MAX_CACHESPRITES
                varrange cacheSprFile,MAX_CACHESPRITES
                varrange fileLo,MAX_CHUNKFILES
                varrange fileHi,MAX_CHUNKFILES
                varrange fileAge,MAX_CHUNKFILES

        ; Actor bounds

                varrange boundsL,MAX_BOUNDS
                varrange boundsR,MAX_BOUNDS
                varrange boundsU,MAX_BOUNDS
                varrange boundsD,MAX_BOUNDS

        ; Navareas

                varrange navAreaType,MAX_NAVAREAS
                varrange navAreaL,MAX_NAVAREAS
                varrange navAreaR,MAX_NAVAREAS
                varrange navAreaU,MAX_NAVAREAS
                varrange navAreaD,MAX_NAVAREAS
            
        ; Maprowtable

                varrange mapTblLo,MAX_MAPROWS
                varrange mapTblHi,MAX_MAPROWS

                checkvarbase $fffa