658 lines
20 KiB
NASM
658 lines
20 KiB
NASM
;================================================================================
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; Utility Functions
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;================================================================================
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!PROGRESSIVE_SHIELD = "$7EF416" ; ss-- ----
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;--------------------------------------------------------------------------------
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; GetSpriteTile
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; in: A - Loot ID
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; out: A - Sprite GFX ID
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;--------------------------------------------------------------------------------
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GetSpriteID:
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JSR AttemptItemSubstitution
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CMP.b #$16 : BEQ .bottle ; Bottle
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CMP.b #$2B : BEQ .bottle ; Red Potion w/bottle
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CMP.b #$2C : BEQ .bottle ; Green Potion w/bottle
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CMP.b #$2D : BEQ .bottle ; Blue Potion w/bottle
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CMP.b #$3C : BEQ .bottle ; Bee w/bottle
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CMP.b #$3D : BEQ .bottle ; Fairy w/bottle
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CMP.b #$48 : BEQ .bottle ; Gold Bee w/bottle
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BRA .notBottle
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.bottle
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PHA : JSR.w CountBottles : CMP.l BottleLimit : !BLT +
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PLA : LDA.l BottleLimitReplacement
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JSL.l GetSpriteID
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RTL
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+
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PLA : .notBottle
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PHX
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PHB : PHK : PLB
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;--------
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TAX : LDA .gfxSlots, X ; look up item gfx
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PLB : PLX
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CMP.b #$F9 : !BGE .specialHandling
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RTL
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.specialHandling
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CMP.b #$F9 : BNE ++ ; Progressive Magic
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LDA.l $7EF37B : BNE +++
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LDA.b #$3B : RTL ; Half Magic
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+++
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LDA.b #$3C : RTL ; Quarter Magic
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++ CMP.b #$FA : BNE ++ ; RNG Item (Single)
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JSL.l GetRNGItemSingle : JMP GetSpriteID
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++ CMP.b #$FB : BNE ++ ; RNG Item (Multi)
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JSL.l GetRNGItemMulti : JMP GetSpriteID
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++ CMP.b #$FD : BNE ++ ; Progressive Armor
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LDA $7EF35B : CMP.l ProgressiveArmorLimit : !BLT + ; Progressive Armor Limit
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LDA.l ProgressiveArmorReplacement
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JSL.l GetSpriteID
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RTL
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+
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LDA.b #$04 : RTL
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++ CMP.b #$FE : BNE ++ ; Progressive Sword
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LDA $7EF359
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CMP.l ProgressiveSwordLimit : !BLT + ; Progressive Sword Limit
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LDA.l ProgressiveSwordReplacement
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JSL.l GetSpriteID
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RTL
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+ : CMP.b #$00 : BNE + ; No Sword
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LDA.b #$43 : RTL
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+ : CMP.b #$01 : BNE + ; Fighter Sword
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LDA.b #$44 : RTL
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+ : CMP.b #$02 : BNE + ; Master Sword
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LDA.b #$45 : RTL
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+ ; CMP.b #$03 : BNE + ; Tempered Sword
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LDA.b #$46 : RTL
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+
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++ : CMP.b #$FF : BNE ++ ; Progressive Shield
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LDA !PROGRESSIVE_SHIELD : AND #$C0 : LSR #6
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CMP.l ProgressiveShieldLimit : !BLT + ; Progressive Shield Limit
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LDA.l ProgressiveShieldReplacement
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JSL.l GetSpriteID
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RTL
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+ : CMP.b #$00 : BNE + ; No Shield
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LDA.b #$2D : RTL
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+ : CMP.b #$01 : BNE + ; Fighter Shield
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LDA.b #$20 : RTL
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+ ; Everything Else
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LDA.b #$2E : RTL
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++
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RTL
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;DATA - Loot Identifier to Sprite ID
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{
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.gfxSlots
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db $06, $44, $45, $46, $2D, $20, $2E, $09
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db $09, $0A, $08, $05, $10, $0B, $2C, $1B
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db $1A, $1C, $14, $19, $0C, $07, $1D, $2F
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db $07, $15, $12, $0D, $0D, $0E, $11, $17
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db $28, $27, $04, $04, $0F, $16, $03, $13
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db $01, $1E, $10, $00, $00, $00, $00, $00
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db $00, $30, $22, $21, $24, $24, $24, $23
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db $23, $23, $29, $2A, $2C, $2B, $03, $03
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db $34, $35, $31, $33, $02, $32, $36, $37
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db $2C, $43, $0C, $38, $39, $3A, $F9, $3C
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; db $2C, $06, $0C, $38, $FF, $FF, $FF, $FF
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;5x
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db $44 ; Safe Master Sword
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db $3D, $3E, $3F, $40 ; Bomb & Arrow +5/+10
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db $2C, $00, $00 ; 3x Programmable Item
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db $41 ; Upgrade-Only Silver Arrows
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db $24 ; 1 Rupoor
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db $47 ; Null Item
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db $48, $48, $48 ; Red, Blue & Green Clocks
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db $FE, $FF ; Progressive Sword & Shield
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;6x
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db $FD, $0D ; Progressive Armor & Gloves
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db $FA, $FB ; RNG Single & Multi
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db $FF, $FF, $FF, $FF, $FF, $FF ; Unused
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db $49, $4A, $49 ; Goal Item Single, Multi & Alt Multi
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db $FF, $FF, $FF ; Unused
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;7x
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db $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21, $21 ; Free Map
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;8x
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db $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16, $16 ; Free Compass
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;9x
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db $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22, $22 ; Free Big Key
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;Ax
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db $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F, $0F ; Free Small Key
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db $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49 ; Unused
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db $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49 ; Unused
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db $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49 ; Unused
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db $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49 ; Unused
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db $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49, $49 ; Unused
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}
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;--------------------------------------------------------------------------------
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;--------------------------------------------------------------------------------
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; GetSpritePalette
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; in: A - Loot ID
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; out: A - Palette
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;--------------------------------------------------------------------------------
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GetSpritePalette:
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JSR AttemptItemSubstitution
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CMP.b #$16 : BEQ .bottle ; Bottle
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CMP.b #$2B : BEQ .bottle ; Red Potion w/bottle
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CMP.b #$2C : BEQ .bottle ; Green Potion w/bottle
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CMP.b #$2D : BEQ .bottle ; Blue Potion w/bottle
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CMP.b #$3C : BEQ .bottle ; Bee w/bottle
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CMP.b #$3D : BEQ .bottle ; Fairy w/bottle
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CMP.b #$48 : BEQ .bottle ; Gold Bee w/bottle
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BRA .notBottle
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.bottle
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PHA : JSR.w CountBottles : CMP.l BottleLimit : !BLT +
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PLA : LDA.l BottleLimitReplacement
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JSL.l GetSpritePalette
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RTL
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+
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PLA : .notBottle
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PHX
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PHB : PHK : PLB
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;--------
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TAX : LDA .gfxPalettes, X ; look up item gfx
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PLB : PLX
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CMP.b #$FA : !BGE .specialHandling
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RTL
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.specialHandling
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CMP.b #$FD : BNE ++ ; Progressive Sword
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LDA $7EF359
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CMP.l ProgressiveSwordLimit : !BLT + ; Progressive Sword Limit
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LDA.l ProgressiveSwordReplacement
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JSL.l GetSpritePalette
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RTL
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+ : CMP.b #$00 : BNE + ; No Sword
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LDA.b #$04 : RTL
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+ : CMP.b #$01 : BNE + ; Fighter Sword
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LDA.b #$04 : RTL
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+ : CMP.b #$02 : BNE + ; Master Sword
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LDA.b #$02 : RTL
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+ ; Everything Else
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LDA.b #$08 : RTL
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++ : CMP.b #$FE : BNE ++ ; Progressive Shield
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LDA !PROGRESSIVE_SHIELD : AND #$C0 : LSR #6
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CMP.l ProgressiveShieldLimit : !BLT + ; Progressive Shield Limit
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LDA.l ProgressiveShieldReplacement
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JSL.l GetSpritePalette
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RTL
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+ : CMP.b #$00 : BNE + ; No Shield
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LDA.b #$04 : RTL
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+ : CMP.b #$01 : BNE + ; Fighter Shield
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LDA.b #$02 : RTL
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+ ; Everything Else
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LDA.b #$08 : RTL
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++ : CMP.b #$FF : BNE ++ ; Progressive Armor
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LDA $7EF35B : CMP.l ProgressiveArmorLimit : !BLT + ; Progressive Armor Limit
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LDA.l ProgressiveArmorReplacement
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JSL.l GetSpritePalette
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RTL
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+ : CMP.b #$00 : BNE + ; Green Tunic
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LDA.b #$04 : RTL
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+ ; Everything Else
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LDA.b #$02 : RTL
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++ : CMP.b #$FC : BNE ++ ; Progressive Gloves
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LDA $7EF354 : BNE + ; No Gloves
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LDA.b #$02 : RTL
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+ ; Everything Else
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LDA.b #$08 : RTL
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++ : CMP.b #$FA : BNE ++ ; RNG Item (Single)
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JSL.l GetRNGItemSingle : JMP GetSpritePalette
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++ : CMP.b #$FB : BNE ++ ; RNG Item (Multi)
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JSL.l GetRNGItemMulti : JMP GetSpritePalette
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++
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RTL
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;DATA - Loot Identifier to Sprite Palette
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{
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.gfxPalettes
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db $00, $04, $02, $08, $04, $02, $08, $02
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db $04, $02, $02, $02, $04, $04, $04, $08
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db $08, $08, $02, $02, $04, $02, $02, $02
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db $04, $02, $04, $02, $08, $08, $04, $02
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db $0A, $02, $04, $02, $04, $04, $00, $04
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db $04, $08, $02, $02, $08, $04, $02, $08
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db $04, $04, $08, $08, $08, $04, $02, $08
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db $02, $04, $08, $02, $04, $04, $02, $02
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db $08, $08, $02, $04, $04, $08, $08, $08
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db $04, $04, $04, $02, $08, $08, $08, $08
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; db $04, $0A, $04, $02, $FF, $FF, $FF, $FF
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db $04 ; Safe Master Sword
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db $08, $08, $08, $08 ; Bomb & Arrow +5/+10
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db $04, $00, $00 ; Programmable Items 1-3
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db $02 ; Upgrade-Only Silver Arrows
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db $06 ; 1 Rupoor
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db $02 ; Null Item
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db $02, $04, $08 ; Red, Blue & Green Clocks
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db $FD, $FE, $FF, $FC ; Progressive Sword, Shield, Armor & Gloves
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db $FA, $FB ; RNG Single & Multi
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db $00, $00, $00, $00, $00, $00 ; Unused
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db $08, $08, $08 ; Goal Item Single, Multi & Alt Multi
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db $00, $00, $00 ; Unused
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Free Map
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db $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04, $04 ; Free Compass
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;db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; *EVENT*
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Free Big Key
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Free Small Key
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Unused
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Unused
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Unused
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Unused
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db $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08, $08 ; Unused
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}
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;--------------------------------------------------------------------------------
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;--------------------------------------------------------------------------------
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; IsNarrowSprite
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; in: A - Loot ID
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; out: Carry - 0 = Full, 1 = Narrow
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;--------------------------------------------------------------------------------
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IsNarrowSprite:
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PHA : PHX
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PHB : PHK : PLB
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JSR AttemptItemSubstitution
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;--------
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CMP.b #$16 : BEQ .bottle ; Bottle
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CMP.b #$2B : BEQ .bottle ; Red Potion w/bottle
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CMP.b #$2C : BEQ .bottle ; Green Potion w/bottle
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CMP.b #$2D : BEQ .bottle ; Blue Potion w/bottle
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CMP.b #$3C : BEQ .bottle ; Bee w/bottle
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CMP.b #$3D : BEQ .bottle ; Fairy w/bottle
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CMP.b #$48 : BEQ .bottle ; Gold Bee w/bottle
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BRA .notBottle
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.bottle
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JSR.w CountBottles : CMP.l BottleLimit : !BLT +
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LDA.l BottleLimitReplacement
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JSL.l IsNarrowSprite
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BRL .done
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+ : BRA .continue
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.notBottle
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CMP.b #$5E : BNE ++ ; Progressive Sword
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LDA $7EF359 : CMP.l ProgressiveSwordLimit : !BLT + ; Progressive Sword Limit
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LDA.l ProgressiveSwordReplacement
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JSL.l IsNarrowSprite
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BRA .done
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+ : BRA .continue
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++ : CMP.b #$5F : BNE ++ ; Progressive Shield
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LDA !PROGRESSIVE_SHIELD : AND #$C0 : BNE + : SEC : BRA .done ; No Shield
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LSR #6 : CMP.l ProgressiveShieldLimit : !BLT + ; Progressive Shield Limit
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LDA.l ProgressiveShieldReplacement
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JSL.l IsNarrowSprite
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BRA .done
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+
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;LDA $7EF35A : BNE + : SEC : BRA .done : +; No Shield
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BRA .false ; Everything Else
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++ CMP.b #$60 : BNE ++ ; Progressive Armor
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LDA $7EF35B : CMP.l ProgressiveArmorLimit : !BLT + ; Progressive Armor Limit
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LDA.l ProgressiveArmorReplacement
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JSL.l IsNarrowSprite
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BRA .done
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+
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++ CMP.b #$62 : BNE ++ ; RNG Item (Single)
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JSL.l GetRNGItemSingle : BRA .continue
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++ CMP.b #$63 : BNE ++ ; RNG Item (Multi)
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JSL.l GetRNGItemMulti
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++
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.continue
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;--------
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LDX.b #$00 ; set index counter to 0
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;----
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-
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CPX.b #$24 : !BGE .false ; finish if we've done the whole list
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CMP .smallSprites, X : BNE + ; skip to next if we don't match
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;--
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SEC ; set true state
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BRA .done ; we're done
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;--
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+
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INX ; increment index
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BRA - ; go back to beginning of loop
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;----
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.false
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CLC
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.done
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PLB : PLX : PLA
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RTL
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;DATA - Half-Size Sprite Markers
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{
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.smallSprites
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db $04, $07, $08, $09, $0A, $0B, $0C, $13
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db $15, $18, $24, $2A, $34, $35, $36, $42
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db $43, $45, $59, $A0, $A1, $A2, $A3, $A4
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db $A5, $A6, $A7, $A8, $A9, $AA, $AB, $AC
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db $AD, $AE, $AF, $FF, $FF, $FF, $FF, $FF
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}
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;--------------------------------------------------------------------------------
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;--------------------------------------------------------------------------------
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; PrepDynamicTile
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; in: A - Loot ID
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;-------------------------------------------------------------------------------- 20/8477
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PrepDynamicTile:
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PHA : PHX : PHY
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JSR.w LoadDynamicTileOAMTable
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JSL.l GetSpriteID ; convert loot id to sprite id
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JSL.l GetAnimatedSpriteTile_variable
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PLY : PLX : PLA
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RTL
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;--------------------------------------------------------------------------------
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;--------------------------------------------------------------------------------
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; LoadDynamicTileOAMTable
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; in: A - Loot ID
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;-------------------------------------------------------------------------------- 20/847B
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!SPRITE_OAM = "$7EC025"
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;--------------------------------------------------------------------------------
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LoadDynamicTileOAMTable:
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PHA : PHP
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PHA
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REP #$20 ; set 16-bit accumulator
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LDA.w #$0000 : STA.l !SPRITE_OAM
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STA.l !SPRITE_OAM+2
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LDA.w #$0200 : STA.l !SPRITE_OAM+6
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SEP #$20 ; set 8-bit accumulator
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LDA.b #$24 : STA.l !SPRITE_OAM+4
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LDA $01,s
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JSL.l GetSpritePalette
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STA !SPRITE_OAM+5 : STA !SPRITE_OAM+13
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PLA
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JSL.l IsNarrowSprite : BCS .narrow
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BRA .done
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.narrow
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REP #$20 ; set 16-bit accumulator
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LDA.w #$0000 : STA.l !SPRITE_OAM+7
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STA.l !SPRITE_OAM+14
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LDA.w #$0800 : STA.l !SPRITE_OAM+9
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LDA.w #$3400 : STA.l !SPRITE_OAM+11
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.done
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PLP : PLA
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RTS
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;--------------------------------------------------------------------------------
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;--------------------------------------------------------------------------------
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; DrawDynamicTile
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; in: A - Loot ID
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; out: A - OAM Slots Taken
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;--------------------------------------------------------------------------------
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; This wastes two OAM slots if you don't want a shadow - fix later - I wrote "fix later" over a year ago and it's still not fixed (Aug 6, 2017) - lol (May 25th, 2019)
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;-------------------------------------------------------------------------------- 2084B8
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!SPRITE_OAM = "$7EC025"
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!SKIP_EOR = "$7F5008"
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;--------------------------------------------------------------------------------
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DrawDynamicTile:
|
|
JSL.l IsNarrowSprite : BCS .narrow
|
|
|
|
.full
|
|
LDA.b #$01 : STA $06
|
|
LDA #$0C : JSL.l OAM_AllocateFromRegionC
|
|
LDA #$02 : PHA
|
|
BRA .draw
|
|
|
|
.narrow
|
|
LDA.b #$02 : STA $06
|
|
LDA #$10 : JSL.l OAM_AllocateFromRegionC
|
|
LDA #$03 : PHA
|
|
|
|
.draw
|
|
LDA.b #!SPRITE_OAM>>0 : STA $08
|
|
LDA.b #!SPRITE_OAM>>8 : STA $09
|
|
STZ $07
|
|
LDA #$7E : PHB : PHA : PLB
|
|
LDA.b #$01 : STA.l !SKIP_EOR
|
|
JSL Sprite_DrawMultiple_quantity_preset
|
|
LDA.b #$00 : STA.l !SKIP_EOR
|
|
PLB
|
|
|
|
LDA $90 : !ADD.b #$08 : STA $90 ; leave the pointer in the right spot to draw the shadow, if desired
|
|
LDA $92 : INC #2 : STA $92
|
|
PLA
|
|
RTL
|
|
;--------------------------------------------------------------------------------
|
|
DrawDynamicTileNoShadow:
|
|
JSL.l IsNarrowSprite : BCS .narrow
|
|
|
|
.full
|
|
LDA.b #$01 : STA $06
|
|
LDA #$04 : JSL.l OAM_AllocateFromRegionC
|
|
BRA .draw
|
|
|
|
.narrow
|
|
LDA.b #$02 : STA $06
|
|
LDA #$08 : JSL.l OAM_AllocateFromRegionC
|
|
|
|
.draw
|
|
LDA.b #!SPRITE_OAM>>0 : STA $08
|
|
LDA.b #!SPRITE_OAM>>8 : STA $09
|
|
STZ $07
|
|
LDA #$7E : PHB : PHA : PLB
|
|
LDA.b #$01 : STA.l !SKIP_EOR
|
|
JSL Sprite_DrawMultiple_quantity_preset
|
|
LDA Bob : BNE + : LDA.b #$00 : STA.l !SKIP_EOR : + ; Bob fix is conditional
|
|
PLB
|
|
|
|
LDA $90 : !ADD.b #$08 : STA $90
|
|
LDA $92 : INC #2 : STA $92
|
|
RTL
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
!TILE_UPLOAD_OFFSET_OVERRIDE = "$7F5042"
|
|
LoadModifiedTileBufferAddress:
|
|
PHA
|
|
LDA !TILE_UPLOAD_OFFSET_OVERRIDE : BEQ +
|
|
TAX
|
|
LDY.w #$0002
|
|
LDA.w #$0000 : STA !TILE_UPLOAD_OFFSET_OVERRIDE
|
|
BRA .done
|
|
+
|
|
LDX.w #$2D40
|
|
LDY.w #$0002
|
|
.done
|
|
PLA
|
|
RTL
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; Sprite_IsOnscreen
|
|
; in: X - Sprite Slot
|
|
; out: Carry - 1 = On Screen, 0 = Off Screen
|
|
;--------------------------------------------------------------------------------
|
|
Sprite_IsOnscreen:
|
|
JSR _Sprite_IsOnscreen_DoWork
|
|
BCS +
|
|
REP #$20
|
|
LDA $E2 : PHA : !SUB.w #$0F : STA $E2
|
|
LDA $E8 : PHA : !SUB.w #$0F : STA $E8
|
|
SEP #$20
|
|
JSR _Sprite_IsOnscreen_DoWork
|
|
REP #$20
|
|
PLA : STA $E8
|
|
PLA : STA $E2
|
|
SEP #$20
|
|
+
|
|
RTL
|
|
|
|
_Sprite_IsOnscreen_DoWork:
|
|
LDA $0D10, X : CMP $E2
|
|
LDA $0D30, X : SBC $E3 : BNE .offscreen
|
|
|
|
LDA $0D00, X : CMP $E8
|
|
LDA $0D20, X : SBC $E9 : BNE .offscreen
|
|
SEC
|
|
RTS
|
|
.offscreen
|
|
CLC
|
|
RTS
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; Sprite_GetScreenRelativeCoords:
|
|
; out: $00.w Sprite Y
|
|
; out: $02.w Sprite X
|
|
; out: $06.b Sprite Y Relative
|
|
; out: $07.b Sprite X Relative
|
|
;--------------------------------------------------------------------------------
|
|
; Copied from bank $06
|
|
;--------------------------------------------------------------------------------
|
|
!spr_y_lo = $00
|
|
!spr_y_hi = $01
|
|
|
|
!spr_x_lo = $02
|
|
!spr_x_hi = $03
|
|
|
|
!spr_y_screen_rel = $06
|
|
!spr_x_screen_rel = $07
|
|
;--------------------------------------------------------------------------------
|
|
Sprite_GetScreenRelativeCoords:
|
|
STY $0B
|
|
|
|
STA $08
|
|
|
|
LDA $0D00, X : STA $00
|
|
!SUB $E8 : STA $06
|
|
LDA $0D20, X : STA $01
|
|
|
|
LDA $0D10, X : STA $02
|
|
!SUB $E2 : STA $07
|
|
LDA $0D30, X : STA $03
|
|
RTL
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; SkipDrawEOR - Shims in Bank05.asm : 2499
|
|
;--------------------------------------------------------------------------------
|
|
!SKIP_EOR = "$7F5008"
|
|
;--------------------------------------------------------------------------------
|
|
SkipDrawEOR:
|
|
LDA.l !SKIP_EOR : BEQ .normal
|
|
LDA.w #$0000 : STA.l !SKIP_EOR
|
|
LDA $04 : AND.w #$F0FF : STA $04
|
|
.normal
|
|
LDA ($08), Y : EOR $04 ; thing we wrote over
|
|
RTL
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; HexToDec
|
|
; in: A(w) - Word to Convert
|
|
; out: $7F5003 - $7F5007 (high - low)
|
|
;--------------------------------------------------------------------------------
|
|
HexToDec:
|
|
PHA
|
|
PHA
|
|
LDA.w #$9090
|
|
STA $04 : STA $06 ; temporarily store our decimal values here for speed
|
|
PLA
|
|
; as far as i can tell we never convert a value larger than 9999, no point in wasting time on this?
|
|
; -
|
|
; CMP.w #10000 : !BLT +
|
|
; INC $03
|
|
; !SUB.w #10000 : BRA -
|
|
; +
|
|
-
|
|
CMP.w #1000 : !BLT +
|
|
INC $04
|
|
!SUB.w #1000 : BRA -
|
|
+ -
|
|
CMP.w #100 : !BLT +
|
|
INC $05
|
|
!SUB.w #100 : BRA -
|
|
+ -
|
|
CMP.w #10 : !BLT +
|
|
INC $06
|
|
!SUB.w #10 : BRA -
|
|
+ -
|
|
CMP.w #1 : !BLT +
|
|
INC $07
|
|
!SUB.w #1 : BRA -
|
|
+
|
|
LDA.b $04 : STA $7F5004 ; move to digit storage
|
|
LDA.b $06 : STA $7F5006
|
|
PLA
|
|
RTL
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; CountBits
|
|
; in: A(b) - Byte to count bits in
|
|
; out: A(b) - sum of bits
|
|
; caller is responsible for setting 8-bit mode and preserving X and Y
|
|
;--------------------------------------------------------------------------------
|
|
CountBits:
|
|
PHB : PHK : PLB
|
|
TAX ; Save a copy of value
|
|
LSR #4 ; Shift down hi nybble, Leave <3> in C
|
|
TAY ; And save <7:4> in Y
|
|
TXA ; Recover value
|
|
AND #$07 ; Put out <2:0> in X
|
|
TAX ; And save in X
|
|
LDA NybbleBitCounts, Y ; Fetch count for Y
|
|
ADC NybbleBitCounts, X ; Add count for X & C
|
|
PLB
|
|
RTL
|
|
|
|
; Look up table of bit counts in the values $00-$0F
|
|
NybbleBitCounts:
|
|
db #00, #01, #01, #02, #01, #02, #02, #03, #01, #02, #02, #03, #02, #03, #03, #04
|
|
|
|
;--------------------------------------------------------------------------------
|
|
|
|
;--------------------------------------------------------------------------------
|
|
; HexToDec
|
|
; in: A(w) - Word to Convert
|
|
; out: $7F5003 - $7F5007 (high - low)
|
|
;--------------------------------------------------------------------------------
|
|
;HexToDec:
|
|
; PHA
|
|
; PHA
|
|
; LDA.w #$9090
|
|
; STA $7F5003 : STA $7F5005 : STA $7F5006 ; clear digit storage
|
|
; PLA
|
|
; -
|
|
; CMP.w #10000 : !BLT +
|
|
; PHA : SEP #$20 : LDA $7F5003 : INC : STA $7F5003 : REP #$20 : PLA
|
|
; !SUB.w #10000 : BRA -
|
|
; + -
|
|
; CMP.w #1000 : !BLT +
|
|
; PHA : SEP #$20 : LDA $7F5004 : INC : STA $7F5004 : REP #$20 : PLA
|
|
; !SUB.w #1000 : BRA -
|
|
; + -
|
|
; CMP.w #100 : !BLT +
|
|
; PHA : SEP #$20 : LDA $7F5005 : INC : STA $7F5005 : REP #$20 : PLA
|
|
; !SUB.w #100 : BRA -
|
|
; + -
|
|
; CMP.w #10 : !BLT +
|
|
; PHA : SEP #$20 : LDA $7F5006 : INC : STA $7F5006 : REP #$20 : PLA
|
|
; !SUB.w #10 : BRA -
|
|
; + -
|
|
; CMP.w #1 : !BLT +
|
|
; PHA : SEP #$20 : LDA $7F5007 : INC : STA $7F5007 : REP #$20 : PLA
|
|
; !SUB.w #1 : BRA -
|
|
; +
|
|
; PLA
|
|
;RTL
|
|
;--------------------------------------------------------------------------------
|
|
|
|
|
|
;================================================================================ |