Perhaps my advice would be obvious for You, but have You tried to
turn of the doWaitVBlank option in DXDraw?
And another thing, You may be interested in this topic:
http://www.pascalgamedevelopment.com...er=asc&start=0
and this link http://www.micrel.cz/Dx/ for further DelphiX speed up
Regards,
Wodzu
Edited:
I didn't know that Jaro=ijcro so You probably visited those links
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