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Old 27 February 2019, 23:07   #4
phx
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Join Date: Nov 2009
Location: Herford / Germany
Posts: 1,566
Quote:
Originally Posted by TEG View Post
Thanks for the modulo hint I had forgot about, but I don't get your 3*40. Isn't it 4*40 (4 bitplans in my example) ?
The modulo defines the number of bytes to skip in a plane, after each line. Usually the next line follows directly in memory (modulo=0), but with interleaved bitplanes you have to skip the lines of three other bitplanes to find the next line of your current plane.

Quote:
Another question: on an Amiga with a 16 bits bus, is writing a byte or a word in the memory, have the same cost in term of cpu cycles and bus availability ?
Yes. That's why it is called 16-bit bus.
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