diff --git a/kfest2018/raster.s b/kfest2018/raster.s index 028fbadf..27241f3a 100644 --- a/kfest2018/raster.s +++ b/kfest2018/raster.s @@ -190,19 +190,22 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra) + ;====================================================== ; We have 4550 cycles in the vblank, use them wisely + ;====================================================== - ; delay 4546 (+1 from loop falltrough, -2 for loadup, -3 for jmp) + ; delay 2737 (4550 +1 from falltrough, -2 for loadup, -1812 for scroll) - ; 4540 = x=9,y=89 + ; Try X=90 Y=6 cycles=2737 - ; kill 3 cycles - lda DRAW_PAGE ; 3 - lda DRAW_PAGE ; 3 + ; waste 2 cycles + ;lda DRAW_PAGE ; 3 + ;lda DRAW_PAGE ; 3 +; nop ; 2 - ldy #89 ; 2 + ldy #6 ; 2 loop5: - ldx #9 ; 2 + ldx #90 ; 2 loop6: dex ; 2 bne loop6 ; 2nt/3 @@ -212,35 +215,41 @@ loop6: - jmp display_loop ; 3 +; jmp display_loop ; 3 - ldy CURRENT_OFFSET - ldx #0 + ;================================ + ; SCROLL THE TEXT + ;================================ + ; 5+ 40*(36 + 9)+5+3 -1 + ; 12+40*(45) = 1812 + + ldy CURRENT_OFFSET ; 3 + ldx #0 ; 2 data_loop: - lda words,Y - sta $6d0,X + lda words,Y ; 4+ + sta $6d0,X ; 5 - lda words2,Y - sta $750,X + lda words2,Y ; 4+ + sta $750,X ; 5 - lda words3,Y - sta $ad0,X + lda words3,Y ; 4+ + sta $ad0,X ; 5 - lda words4,Y - sta $b50,X + lda words4,Y ; 4+ + sta $b50,X ; 5 - iny - inx - cpx #40 - bne data_loop + iny ; 2 + inx ; 2 + cpx #40 ; 2 + bne data_loop ; 2nt/3 - inc CURRENT_OFFSET + inc CURRENT_OFFSET ; 5 - lda #128 - jsr WAIT +; lda #128 +; jsr WAIT - jmp display_loop + jmp display_loop ; 3 ;==================================