base:introduction_to_raster_irqs
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| base:introduction_to_raster_irqs [2015-04-17 04:32] – external edit 127.0.0.1 | base:introduction_to_raster_irqs [2016-12-08 21:46] (current) – bit 8 = 9th bit cruzer | ||
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| + | Edit: Isn't actually stable. Use another example. | ||
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| ====== Introduction to raster IRQs ====== | ====== Introduction to raster IRQs ====== | ||
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| lda #$1b ;as there are more than 256 rasterlines, | lda #$1b ;as there are more than 256 rasterlines, | ||
| - | sta $d011 ;the 8th bit for the rasterline we want our irq to be triggered. | + | sta $d011 ;the 9th bit for the rasterline we want our irq to be triggered. |
| ;here we simply set up a character screen, leaving the topmost bit 0. | ;here we simply set up a character screen, leaving the topmost bit 0. | ||
base/introduction_to_raster_irqs.txt · Last modified: 2016-12-08 21:46 by cruzer