On Mon, 4 Oct 1999, Nicolas Welte wrote: > BTW, how do the TED memory accesses work? When I got my C16 a couple of years ago, the first program I wrote for it was a memory access logger (similar to the ones for the C64 developed by Andreas Boose and me, but much simpler, thanks to the "horizontal raster position" register of the TED). I don't think that I ever released the results to the public, though; I just mailed it to a few plus/4 freaks. One interesting thing, found by Levente (I think), is that memory refreshes are like reads from $FF00-$FFFF. When the refresh was at $FF00-$FF3F, the program recorded the corresponding TED register values (although it was reading from the same constant address in open address space all the time). > it must have more accesses to the memory than the VIC-II. True, it has two bad lines, one 1 line before the character row and one at the first line of the character row. > It should also be true that the TED memory clock always runs at about > 2MHz and uses Yes, and the CPU will automatically be switched to single clock when the TED needs the bus. I'm not aware of any way to override that, to get a result similar to that on the C128, where the VIC-IIe will happily display data fetched by the processor. Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
Archive generated by hypermail 2.1.1.