68 lines
917 B
ArmAsm
68 lines
917 B
ArmAsm
; goal
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;
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; 192 lines
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; window is 32 lines
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; so 0...current
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; current...current+32
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; current+32...192
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; double hi-res / double lo-res
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; test, 100 lines of double-hires
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; 100*65 = 6500
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; 2+ X*(12+2+3) - 1
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effect_top_smc:
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ldx #100 ; 2
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aloop:
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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dex ; 2
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bne aloop ; 2/3
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; return to regular hi-res
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sta SETAN3 ; leave double mode
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sta CLR80COL ; leave 80-col mode
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bit PAGE2
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ldx #32 ; 2
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bloop:
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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dex ; 2
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bne bloop ; 2/3
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bit SET_GR
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bit HIRES
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sta CLRAN3 ; enable double mode
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sta SET80COL ; enable 80-column mode
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bit PAGE1
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effect_bottom_smc:
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ldx #60 ; 2
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cloop:
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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jsr delay_12 ; 12
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inx ; 2
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cpx #192
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bcs cloop ; 2/3
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