>time it wants to do DMA (this is part of the reason why sprites turn off
>automatically when the Kernal LOAD routine starts), which interferes with
>the exact timing the IEC bus protocol demands. To get this speed boost
>back, you send the drive a UI+ command, and then turn the 64's screen off
>with POKE 53265,11.
That is interesting. On the Atari 8-bit, turning off DMA turns off video.
You get a 30% speed increase by doing this (poke 559,0). Drive access
does not do this though it's tricky to do both video and heavy i/o at the
same time. This was fodder for lots of demo's that did sound, disk, and
video at the same time.
V/R
Jeff
--
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Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid_at_home.com
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Received on Fri Nov 17 2000 - 23:26:12 GMT