On Tuesday 06 October 2009, Andy Pugh wrote: >2009/10/6 Wayne Patterson <way...@wavelinx.net>: >> The machine is also somewhat different then most. It is set up with a >> Quadrature drive. >> Unlike a Step and Drive pin. You have two pins the are turned on and off >> in sequence. > >Seems an odd way to do it, but I read that EMC supports that yesterday >looking for something else. I recall wondering at the time "why?" and >now I know. > >Stepgen mode 1, IIRC > Did you ever use an Amiga, and its mouse, and note the mouse was absolutely and totally real time? The quadrature signals from the wheels in it weren't encoded into a 1200 baud serial format for sending up the cable, all 4 signals from both directions went up the cable into a special chip that moved the mouse by hardware. And you couldn't move the mouse fast enough to over run that logic. When LightWave was ported to windows, it was very frustrating to the artists who learned LightWave on the amiga, cuz you had to move the mouse slowly, and let it sit for a while to make sure your click was on the right pixel.
-- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> BASIC is to computer programming as QWERTY is to typing. -- Seymour Papert ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
