lphillips@lpami.wimsey.bc.ca (Larry Phillips) (02/17/90)
In <9?!#+`-@rpi.edu>, jvmiller@zeno1.rdrc.rpi.edu (Jim Miller) writes: > I am interested in using the digital RGB outputs and I need to >know if the XCLK*, and XCLKEN* are outputs and if XCLK* is a clock >running at the pixel rate. Any detailed timing information on how these signals >work would be greatly appreciated. XCLKEN* is an inoput. It enables the external clock, which is an input to XCLK* It is for supplying an external; clock to the Amiga, especially for genlocking the Amiga clock to an external video signal. -larry -- Gallium Arsenide is the technology of the future; always has been, always will be. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
jvmiller@zeno1.rdrc.rpi.edu (Jim Miller) (02/17/90)
I am interested in using the digital RGB outputs and I need to know if the XCLK*, and XCLKEN* are outputs and if XCLK* is a clock running at the pixel rate. Any detailed timing information on how these signals work would be greatly appreciated. 1 XCLK* 13 GNDRTN 2 XCLKEN* 14 ZD* 3 RED 15 C1* 4 GREEN 16 GND 5 BLUE 17 GND 6 DI 18 GND 7 DB 19 GND 11 HSYNC* 23 +5V 12 VSYNC*
daveh@cbmvax.commodore.com (Dave Haynie) (02/20/90)
In article <9?!#+`-@rpi.edu> jvmiller@zeno1.rdrc.rpi.edu (Jim Miller) writes: > I am interested in using the digital RGB outputs and I need to >know if the XCLK*, and XCLKEN* are outputs and if XCLK* is a clock >running at the pixel rate. Both XCLK and XCLKEN* are inputs. XCLK is an alternate 28.636 (NTSC) system basis clock, and XCLKEN* switches the multiplexer that directs the system to use XCLK instead of the internal clock. Generally this clock is provided by Genlock devices to slave the Amiga system to an external video signal. If you're interested in cleanly clocking pixels somehow, you need to talk with an Amiga Video Wizard of some sort -- that looks a bit like black magic even to me, though I kinda know what is done (Hedley hires and flickerFixer do this sort of thing). I'd recommend Pete Silverstone or Hedley Davis; there may be a few others who know this stuff, but I wouldn't bet on there being more than a handful or so. -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Too much of everything is just enough