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shave some bytes
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4am
parent
316be9bb0b
commit
d78a1c4807
@ -2,14 +2,19 @@
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;(c) 2020 by 4am & qkumba
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;
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src = $00 ; [word, must be at $00]
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src = $00 ; [word][must be at $00]
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dst = $02 ; [word]
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box = $04 ; [byte]
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stage = $05 ; [byte]
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any = $06 ; [byte]
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x = $07
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rowcount = $07 ; [byte]
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any = $05 ; [byte]
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rowcount = $06 ; [byte]
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; order matters for the following group
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maskindex = $0A ; [byte][codegen]
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stage = $0B ; [byte][codegen]
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m_dst = $0C ; [word][codegen]
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o_dst = $0E ; [word][codegen]
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BoxStages = $10 ; [$30 bytes][must be at $10]
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hgrhi = $40 ; [$C0 bytes]
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hgrlo = $300 ; [$C0 bytes]
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@ -51,78 +56,82 @@ hgrlo = $300 ; [$C0 bytes]
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dex
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bne -
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ldx #13
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stx x
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-- ldx x
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ldy #$7F
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--- ldx #6
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stx maskindex
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-- ldy #$7F
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- lda MIDDLE_STAGE, y
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sta ($0C), y
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sta (m_dst), y
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lda OUTER_STAGE, y
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sta ($0E), y
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sta (o_dst), y
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dey
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bpl -
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ldx maskindex
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lda MiddleRowCounts, x
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ldy #m_rowcount
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sta ($0C), y
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sta (m_dst), y
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lda OuterRowCounts, x
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ldy #o_rowcount
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sta ($0E), y
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sta (o_dst), y
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lda MiddleFirstRows, x
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ldy #m_firstrow
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sta ($0C), y
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sta (m_dst), y
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lda OuterFirstRows, x
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ldy #o_firstrow
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sta ($0E), y
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sta (o_dst), y
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lda EdgeLeftMasks, x
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ldy #m_edgeleftmask
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sta ($0C), y
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sta (m_dst), y
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ldy #o_edgeleftmask
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sta ($0E), y
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sta (o_dst), y
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lda EdgeRightMasks, x
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ldy #m_edgerightmask
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sta ($0C), y
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sta (m_dst), y
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ldy #o_edgerightmask
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sta ($0E), y
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sta (o_dst), y
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lda LeftMasks, x
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ldy #m_leftmask
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sta ($0C), y
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sta (m_dst), y
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ldy #o_leftmask
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sta ($0E), y
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sta (o_dst), y
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lda RightMasks, x
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ldy #m_rightmask
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sta ($0C), y
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sta (m_dst), y
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ldy #o_rightmask
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sta ($0E), y
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sta (o_dst), y
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ldx stage
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lda CopyFlags, x
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bne +
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lda #$A9
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lda #$A9 ; LDA #$44 opcode
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ldy #m_lda
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sta ($0C), y
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sta (m_dst), y
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ldy #o_lda1
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sta ($0E), y
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sta (o_dst), y
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lda #$24
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lda #$24 ; BIT $44 opcode
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ldx #5
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- ldy MiddleBits, x
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sta ($0C), y
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sta (m_dst), y
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ldy OuterBits, x
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sta ($0E), y
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sta (o_dst), y
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dex
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bpl -
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+ dec $0D
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dec $0F
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dec x
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+LBPL --
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+ dec m_dst+1
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dec o_dst+1
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dec stage
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bmi +
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dec maskindex
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+LBMI ---
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jmp --
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+
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+BUILD_HGR_LOOKUP_TABLES hgrlo, hgrhi
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MainLoop lda #0
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@ -403,16 +412,12 @@ copy0F=$9B00
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MiddleFirstRows
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!byte $0D,$0C,$0B,$0A,$09,$08,$07
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!byte $0D,$0C,$0B,$0A,$09,$08,$07
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OuterFirstRows
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!byte $06,$05,$04,$03,$02,$01,$00
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!byte $06,$05,$04,$03,$02,$01,$00
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MiddleRowCounts
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!byte $05,$07,$09,$0B,$0D,$0F,$11
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!byte $05,$07,$09,$0B,$0D,$0F,$11
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OuterRowCounts
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!byte $13,$15,$17,$19,$1B,$1D,$1F
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!byte $13,$15,$17,$19,$1B,$1D,$1F
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EdgeLeftMasks
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!byte %11000000
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!byte %11100000
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@ -421,13 +426,6 @@ EdgeLeftMasks
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!byte %11111100
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!byte %11111110
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!byte %11111111
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!byte %11000000
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!byte %11100000
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!byte %11110000
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!byte %11111000
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!byte %11111100
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!byte %11111110
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!byte %11111111
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EdgeRightMasks
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!byte %10000001
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!byte %10000011
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@ -436,13 +434,6 @@ EdgeRightMasks
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!byte %10011111
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!byte %10111111
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!byte %11111111
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!byte %10000001
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!byte %10000011
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!byte %10000111
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!byte %10001111
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!byte %10011111
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!byte %10111111
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!byte %11111111
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LeftMasks
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!byte %11000000
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!byte %10100000
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@ -451,13 +442,6 @@ LeftMasks
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!byte %10000100
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!byte %10000010
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!byte %10000001
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!byte %11000000
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!byte %10100000
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!byte %10010000
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!byte %10001000
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!byte %10000100
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!byte %10000010
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!byte %10000001
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RightMasks
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!byte %10000001
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!byte %10000010
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@ -466,13 +450,6 @@ RightMasks
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!byte %10010000
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!byte %10100000
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!byte %11000000
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!byte %10000001
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!byte %10000010
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!byte %10000100
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!byte %10001000
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!byte %10010000
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!byte %10100000
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!byte %11000000
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CopyFlags
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!byte 0,0,0,0,0,0,0
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!byte 1,1,1,1,1,1,1
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@ -508,7 +485,10 @@ BoxesY ; starting byte offset for each box
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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CopyParams ; must be immediately before BoxInitialStages
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CopyParams
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; must be immediately before BoxInitialStages so they get
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; copied into the right places in zero page
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!byte 13
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!word $8D00
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!word $9B00
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@ -106,6 +106,12 @@
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+
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}
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!macro LBMI .target {
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bpl +
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jmp .target
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+
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}
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!macro LBNE .target {
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beq +
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jmp .target
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