On Wednesday 30 April 2008, Thomas J Powderly wrote: >Gene, >pci_8255 is in my cvs emc2 run-in-place installation >pci_8255.c >pci_8255.o >and >i think the hal_ax5214h.c driver in all emc2 installs is really an 8255 >(the src doesnt say that, so may be wrong)
>From the looks of the link I found on google, it is a ttl ssi version of a pair of 8255's, for only 48 bits of I/O. If that driver can be expanded to handle 3 'channels' or 'groups', and can have its I/O addressing made compatible with this card, whose I/O addressing IIRC wastes addressing space by not making all 3 chips contiguous, then it might work just fine. Those are the gotcha's I recall from when I was playing with it before giving up and throwing more money at a xylotex kit with 3 motors. >tomp > Great Thomas. Is this code you did, or were you able to make the code that came on the cd's with the cards actually build on linux? >in On Tue, 2008-04-29 at 22:56 -0400, Gene Heskett wrote: >> On Tuesday 29 April 2008, Andrew Ayre wrote: >> >Wow - 8255s - I didn't know those were still used for commercial >> > products. >> >> Small correction, 82C55's, the cmos versions, so the board doesn't draw >> much more power than is consumed by any outputs being pulled high. Each >> line is limited to about a 2 mill load, but can pull rail to rail both >> directions. I had some of them once, sent them someplace that was gonna >> write a linux driver. I tried to write one myself, and found I knew very >> little about 'PC' architecture. The card contains no bios AFAIK, so its >> invisible to an lspci listing. >> >> Once a linux driver is available, I think they would make a very nice >> interface for emc's use. With all 24 lines available on each chip, the >> i/o expansion possibilities sure beat the usual parport, an architecture >> originally built from the 8255 decades ago. IIRC the actual cabling from >> each chip was on a 34 pin floppy drive sized cable, so each card gave you >> 3, 34 pin ribbon cables out of a spare slot opening in the back of the >> case. >> >> One thing I ran into was that while that web site below shows prices in >> USD, they billed my card in AUD and applied the exchange rate, so I paid >> about a 20% premium over the quoted price. Quite close to a big buck each >> at the time, which was about 4, maybe 5 years ago now. >> >> I also bought a few of stepper controllers based on the L298 they have, >> touch them only with a very long pole, there is no current chopper >> available for current regulation. >> >> >Andy >> > >> >Dave Keeton wrote: >> >> This board looks good! I did just buy a new NI DIO 96 board off of EBAY >> >> for 50 bucks....If it does'nt work out I'll check it out. I guess i was >> >> completely wrong about the I/O situation. You all have been a big >> >> help....How do I go about setting up the drivers for these boards in >> >> EMC? I am not all that familiar with Linux.... >> >> >> >> Dave >> >> >> >> ----- Original Message ----- >> >> From: "Thomas J Powderly" <[EMAIL PROTECTED]> >> >> To: "Enhanced Machine Controller (EMC)" >> >> <emc-users@lists.sourceforge.net> Sent: Tuesday, April 29, 2008 12:39 >> >> PM >> >> Subject: Re: [Emc-users] Classicladder >> >> >> >>> to Dave Keeton: >> >>> http://www.futurlec.com/PCI8255.shtml >> >>> 79$ US >> >>> 72 i/o points >> >>> pci >> >>> emc2 driver is available, "sorta beta" >> >>> regards >> >>> TomP >> >>> >> >>> >> >>> >> >>> ---------------------------------------------------------------------- >> >>>--- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >> >>> Don't miss this year's exciting event. There's still time to save >> >>> $100. Use priority code J8TL2D2. >> >>> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com >> >>>/ja vaone _______________________________________________ >> >>> Emc-users mailing list >> >>> Emc-users@lists.sourceforge.net >> >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> >> ----------------------------------------------------------------------- >> >>-- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >> >> Don't miss this year's exciting event. There's still time to save $100. >> >> Use priority code J8TL2D2. >> >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/ >> >>jav aone _______________________________________________ >> >> Emc-users mailing list >> >> Emc-users@lists.sourceforge.net >> >> https://lists.sourceforge.net/lists/listinfo/emc-users > >------------------------------------------------------------------------- >This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >Don't miss this year's exciting event. There's still time to save $100. >Use priority code J8TL2D2. >http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javao >ne _______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users -- 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) Many aligators will be slain, but the swamp will remain. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
