73 lines
1.1 KiB
ArmAsm
73 lines
1.1 KiB
ArmAsm
; just a static effect for near-beginning
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; note comes in with 6 (jsr) + 6 (rts) + vblank jitter
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; wait 24 scanlines lines
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; (24*65) = 1560 cycles
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; ??-8 = 1560-8 = 1552
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effect_static:
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; 3 LINES 80-COL TEXT AN3=0 PAGE=2
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; intentionally a few cycles short as vblank returns+ a few cycles
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; bit SET_TEXT ; 4
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; bit PAGE2 ; 4
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jsr delay_1544
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; 3 LINES 40-COL TEXT AN3=0 PAGE=2
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sta CLR80COL ; 4
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bit SET_TEXT ; 4
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jsr delay_1552 ; 1560 total
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; 3 LINES 40-col LORES AN3=0 PAGE=1
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bit PAGE1 ; 4
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bit SET_GR ; 4
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jsr delay_1552 ; 1560 total
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; 3 LINES 80-col DLORES AN3=0 PAGE=1
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sta LORES ; 4
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sta SET80COL ; 4
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sta CLRAN3 ; 4
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jsr delay_1548 ; 1560 total
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; 3 LINES 80-col DLORES AN3=0 PAGE=1
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jsr delay_1560
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; 3 lines HIRES 40-COL AN3=1 PAGE=2
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sta CLR80COL ; 4
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sta HIRES ; 4
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sta PAGE2 ; 4
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sta SETAN3 ; 4
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jsr delay_1544
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; 3 lines Double-hires AN3=0 PAGE=1
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sta PAGE1 ; 4
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bit HIRES ; 4
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sta SET80COL ; 4 ; set 80 column mode
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sta CLRAN3 ; 4 ; doublehireson
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jsr delay_1544
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; 3 line Double-HIRES
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jsr delay_1560
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; set 80-column text for next iteration
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sta SET_TEXT ; 4
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bit PAGE2 ; 4
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rts
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