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    SubjectRe: DOS2linux
    Alan Cox wrote:
    >
    > Oh god, thats the deep magic EISA weirdness department

    *gnarf* ;-) Not good for a beginner like me I assume? :-(

    > Well actually its one of those things that needs writing cleanly but
    > currently appears in its own form in some EISA drivers

    Hmm... with 'writing cleanly' you mean that there should become things
    available like eisa_register_device() etc...?

    > EISA slots are I/O mapped at 0x1000, 0x2000, 0x3000, 0x4000 -> 0x8000
    > The ID port is at base+0xc80
    > Configuration data follows at base+0xc84, 0xc88 ...

    Yep, that was also what I figured out.

    > I would assume the 320 byte buffer is providing this same data block, and
    > maybe more but I don't know the details.

    That is also what I think, but the problem is that I don't know at
    which offset to look for that data...
    If you look at the code:

    static int getslotinfo( void )
    {
    static char buff[320], *s=&buff[0]; int valid;

    inregs.h.ah=0xd8; inregs.h.al=0x1; inregs.h.cl=DiSC_Id.slot>>12;
    inregs.h.ch=0;
    sregs.ds=FP_SEG(s); inregs.x.si=FP_OFF(s);
    int86x(0x15, &inregs, &outregs, &sregs);
    valid=outregs.h.ah;
    if(!valid) { DiSC_Id.it=buff[itconf]; DiSC_Id.dma=buff[dmachd]; }
    return(valid);
    }

    Would it help if i told you that itconf and dmachd are defined as (see
    http://mc303.ulyssis.org/heim/downloads/DISCINC.H )

    #define itconf 0xb2
    #define dmachd 0xc0

    So if my EISA board is at 0x1000, i should be able to read these
    values from 0x1000+0xb2 and 0x1000+0xc0 ??? And if 'yes', any idea
    about how to read them? (byte, word, long...? My guess would be as a
    byte, but I'm not sure...)

    > I thought EISA boards had gone away

    Unfortunately... the device I am trying to write a driver for is
    especially designed for our university. Not many of those boards
    exist in the world I guess :-(
    (I hope that last sentence didn't take away your interest in my
    project ;-)

    Greetzzz,
    mc303

    --
    Ing. Bart Vandewoestyne Bart.Vandewoestyne@pandora.be
    Hugo Verrieststraat 48 GSM: +32 (0)478 397 697
    B-8550 Zwevegem http://users.pandora.be/vandewoestyne
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