83 lines
1.8 KiB
NASM
83 lines
1.8 KiB
NASM
; -----------------------------------------------------------
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; slide2.asm - OUR FIRST GAME: Definitely not an Impostor
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; big block letters with the gold wash running across them;
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; each text block gets a shifted wash phase, so the glow
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; rolls through the three lines diagonally
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; -----------------------------------------------------------
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s2_init:
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jsr clear_screen
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+prtext 1, 13, WHITE, txt_firstgame, txt_firstgame_end - txt_firstgame
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+prbig 4, 0, YELLOW, big_definitely, 10
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+prbig 10, 8, YELLOW, big_notan, 6
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+prbig 16, 4, YELLOW, big_impostor, 8
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+prtext 23, 10, LGREY, txt_tic80, txt_tic80_end - txt_tic80
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rts
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s2_update:
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lda RASTER
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cmp #RAS_BOTTOM
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bne s2_update
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inc framectr
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lda framectr ; wash moves one column every 2nd frame
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and #1
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bne s2_hold
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inc washphase
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s2_hold:
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; gold wash across all 15 big-letter rows (4-8, 10-14, 16-20);
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; each block is 5 wash steps behind the one above -> diagonal
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ldx #39
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s2_loop:
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txa
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clc
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adc washphase
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and #15
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tay
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lda washtbl,y
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sta COLRAM + 4*40,x
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sta COLRAM + 5*40,x
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sta COLRAM + 6*40,x
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sta COLRAM + 7*40,x
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sta COLRAM + 8*40,x
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tya
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clc
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adc #5
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and #15
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tay
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lda washtbl,y
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sta COLRAM + 10*40,x
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sta COLRAM + 11*40,x
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sta COLRAM + 12*40,x
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sta COLRAM + 13*40,x
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sta COLRAM + 14*40,x
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tya
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clc
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adc #5
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and #15
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tay
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lda washtbl,y
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sta COLRAM + 16*40,x
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sta COLRAM + 17*40,x
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sta COLRAM + 18*40,x
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sta COLRAM + 19*40,x
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sta COLRAM + 20*40,x
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dex
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bpl s2_loop
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rts
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; ---- data ----
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txt_firstgame:
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!scr "our first game"
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txt_firstgame_end:
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big_definitely:
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!scr "definitely"
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big_notan:
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!scr "not an"
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big_impostor:
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!scr "impostor"
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txt_tic80:
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!scr "introduced on tic-80"
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txt_tic80_end:
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