On Wednesday, January 26, 2011 09:27:46 pm Peter C. Wallace did opine: > On Wed, 26 Jan 2011, gene heskett wrote: > >> The NetMOS/MOSChip chipsets are known _not_ to support EPP mode > >> properly so will not work with Mesa/Pico/Pluto FPGA cards. They will > >> work fine if you just want more I/O however. > > > > Thanks Peter. Now, to remember that when I do want to use it, that is > > the problem. > > > > What specifically fails? > > http://www.mail-archive.com/emc-users@lists.sourceforge.net/msg11230.htm > l
This reads amazingly similar to a problem I had with an eprom burner I made while at a radio station in NE CA in about '81 or '82, with about $25 worth of parts, where the chip running the show was a Zilog Z-80. I was not able to get a reliable write through my buffers and at the lines of the eprom socket in time to get a good latch even with FAST parts, so I gave up and called Zilog. Their response was that they thought ever one knew that when the bus cycle started, if /READ wasn't true, then it was going to be a write and that I should enable the buffers at the start of the cycle anytime /READ was high. That gave me another 100ns or so to get every thing in one sock and worked flawlessly. But there was no hint in the published docs about such a prediction method. Now, whether such a similar work-around could be cobbled up for that, I have no clue. Besides, the card I have does not have the 9805, but has the 9815, presumably a newer chipset. I wonder it there could have been a fix for that applied in the newer 9815 chip? How would one go about checking that?, I assume with a loopback plugged in it should be amenable to software checking. One would have to cobble up a parallel loopback, I may have enough of those parts on hand. Thanks Peter. -- 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) <http://www.captaincanadacrusades.ca/articles/none-dare-call-it- conspiracy%5B1%5D.pdf> Today, THREE WINOS from DETROIT sold me a framed photo of TAB HUNTER before his MAKEOVER! ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
