On Wed, 4 Apr 2001, Ruud Baltissen wrote: > I'm not sure if the VIC chip steals cycles but it at least needs to access > the video- and colorRAM to build up a screen. And just for this reason alone > it needs to be able to master the bus. In the VIC-20, the VIC-I is the only chip that uses (transparent) DMA. Since the dot clock is only 4 times the bus clock, the VIC-I has 2 bus accesses per displayed 8 pixels. There are no bad lines, since both the attributes (color and character codes) and the graphics (character graphics data) are fetched on each line. Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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