I know it's neither new nor terribly interesting to some, but the recent Ultimax mode success bolstered my confidence to try a few more complex things, like CBM 64 DMA. I've been impressed by the flexibility of the development cart I designed, as it required no more work to set up for DMA tests. I started off my trying to DMA one byte (to address $8000), and when that worked, I then tried 256 bytes. I hit a snag when trying to store a user defined length and had to reimplement the code to use a state machine. But, I have managed to get 1-256 bytes (user defined) to DMA from the cart to the 64. It's a small victory, but I always felt the DMA mode was a mystery in implementation details. Jim -- Jim Brain brain@jbrain.com www.jbrain.comReceived on 2018-06-12 08:00:04
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