/[projet1]/public/oric/demos/SlideShowDemo/code/transitions.s
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revision 1049 by dbug, Sun Dec 22 13:42:11 2013 UTC revision 1050 by dbug, Sun Dec 22 17:05:37 2013 UTC
# Line 76  end_author Line 76  end_author
76    
77      ; Install the IRQ callback to clear the text display      ; Install the IRQ callback to clear the text display
78          sei          sei
79          lda #40          lda #39
80          sta description_position          sta description_position
81          lda #<_EraseDescriptionCallback          lda #<_EraseDescriptionCallback
82          sta _InterruptCallBack_1+1          sta _InterruptCallBack_1+1
# Line 89  end_author Line 89  end_author
89    
90  _EraseDescriptionCallback  _EraseDescriptionCallback
91  .(  .(
92            ; Switch to ALT charset on the first of the three lines of text
93            lda #9
94            sta $bb80+40*25
95    
96            ; Delete the rest of the line
97          lda #" "          lda #" "
98          ldx description_position          ldx description_position
99          sta $bb80+40*25-1,x          sta $bb80+40*25,x
100          dex          dex
101      bne not_done_yet      bne not_done_yet
102    

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