dos33fsprogs/vaporlock/doubledouble/effect_dhgr_hgr.s

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