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SLOT 3
NEWBANK BITMAP2
;---------------------------------------------------------------------------------------------------
DEF ClearRowBitmap
SUBROUTINE
REFER CallClear
VEND ClearRowBitmap
; No transient variable dependencies/calls
lda #0
ldy #ROW_BITMAP_SIZE
.clearRow sta@RAM ChessBitmap-1,y
dey
bne .clearRow
rts
;---------------------------------------------------------------------------------------------------
DEF CopyPieceToRowBitmap;@3
SUBROUTINE
;REFER CopySinglePiece ; special-case due to 'intercept'
VEND CopyPieceToRowBitmap
ldy #17
bcs .rightSide
.copyPiece lda __pieceShapeBuffer,y
beq .blank1
eor ChessBitmap,y
sta@RAM ChessBitmap,y
.blank1 lda __pieceShapeBuffer+18,y
beq .blank2
eor ChessBitmap+18,y
sta@RAM ChessBitmap+18,y
.blank2 lda __pieceShapeBuffer+36,y
beq .blank3
eor ChessBitmap+36,y
sta@RAM ChessBitmap+36,y
.blank3 lda __pieceShapeBuffer+54,y
beq .blank4
eor ChessBitmap+54,y
sta@RAM ChessBitmap+54,y
.blank4 dey
bpl .copyPiece
rts
.rightSide
SUBROUTINE
.copyPieceR lda __pieceShapeBuffer,y
beq .blank1
eor ChessBitmap+72,y
sta@RAM ChessBitmap+72,y
.blank1 lda __pieceShapeBuffer+18,y
beq .blank2
eor ChessBitmap+72+18,y
sta@RAM ChessBitmap+72+18,y
.blank2 lda __pieceShapeBuffer+36,y
beq .blank3
eor ChessBitmap+72+36,y
sta@RAM ChessBitmap+72+36,y
.blank3 lda __pieceShapeBuffer+54,y
beq .blank4
eor ChessBitmap+72+54,y
sta@RAM ChessBitmap+72+54,y
.blank4 dey
bpl .copyPieceR
rts
;---------------------------------------------------------------------------------------------------
IF 1
DEF WriteBlank
SUBROUTINE
REFER StartupBankReset
VEND WriteBlank
lda #<BlankSprite
sta@RAM SMSPRITE0_0+1
sta@RAM SMSPRITE8_0+1
sta@RAM SMSPRITE16_0+1
sta@RAM SMSPRITE0_1+1
sta@RAM SMSPRITE8_1+1
sta@RAM SMSPRITE16_1+1
lda #>BlankSprite
sta@RAM SMSPRITE0_0+2
sta@RAM SMSPRITE8_0+2
sta@RAM SMSPRITE16_0+2
sta@RAM SMSPRITE0_1+2
sta@RAM SMSPRITE8_1+2
sta@RAM SMSPRITE16_1+2
rts
ENDIF
;---------------------------------------------------------------------------------------------------
IF 1
DEF WriteCursor
SUBROUTINE
REFER StartupBankReset
VEND WriteCursor
sec
lda cursorX12
bmi .exit
ldx #10
.sub10 sbc #10
dex
bcs .sub10
stx SET_BANK_RAM
lda #<SpriteBuffer
sta@RAM SMSPRITE0_0+1
sta@RAM SMSPRITE8_0+1
sta@RAM SMSPRITE16_0+1
lda #>SpriteBuffer
sta@RAM SMSPRITE0_0+2
sta@RAM SMSPRITE8_0+2
sta@RAM SMSPRITE16_0+2
.exit rts
ENDIF
;---------------------------------------------------------------------------------------------------
IF 0
DEF SaveBitmap
SUBROUTINE
REFER SAFE_BackupBitmaps
VEND SaveBitmap
ldy #71
.fromTo lda ChessBitmap,y
sta@RAM BackupBitmap,y
lda ChessBitmap+72,y
sta@RAM BackupBitmap+72,y
dey
bpl .fromTo
rts
ENDIF
;---------------------------------------------------------------------------------------------------
IF 0
DEF RestoreBitmap
SUBROUTINE
VEND RestoreBitmap
ldy #71
.fromTo lda BackupBitmap,y
sta@RAM ChessBitmap,y
lda BackupBitmap+72,y
sta@RAM ChessBitmap+72,y
dey
bpl .fromTo
rts
ENDIF
;---------------------------------------------------------------------------------------------------
IF 0
DEF CopyTextToRowBitmap
SUBROUTINE
VEND CopyTextToRowBitmap
; An OR-draw, used for placing matricies/text onscreen
; Similar to the EOR - first copy data into __pieceShapeBuffer, then call this function
; The draw can be bracketed by "SaveBitmap" and "RestoreBitmap" to leave screen
; in original state once text disappears
ldy #71
bcs .rightSide
.copy lda __pieceShapeBuffer,y
ora ChessBitmap,y
sta@RAM ChessBitmap,y
dey
bpl .copy
rts
.rightSide
SUBROUTINE
.copy lda __pieceShapeBuffer,y
ora ChessBitmap+72,y
sta@RAM ChessBitmap+72,y
dey
bpl .copy
rts
ENDIF
;---------------------------------------------------------------------------------------------------
CHECK_RAM_BANK_SIZE "ROM_SHADOW_SCREEN"
;---------------------------------------------------------------------------------------------------
;EOF