I have a routine from a DOS driver that looks like this:
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);
}
(full DOS-code is at http://mc303.ulyssis.org/heim/downloads/DISCDRV.C
)
Doing some research learned me that this piece of code does the
following things (according to http://www.ctyme.com/intr/rb-1641.htm
):
1) set AX register to 0xd800
2) set slot number to DiSC_Id.slot, (eg. 1 in my case -> base is
0x1000)
3) set function number to read
4) assign a 320-byte buffer for standard configuration data block
5) execute a software interrupt via the DOS specific int86x function,
this puts configuration data into the 320-byte buffer.
6) check if we get a valid return
7) if we have a valid situation, assign values from the configuration
block to DiSC_Id.it (it level) and DiSC_Id.dma (dma level)
So here's my question:
On http://www.ctyme.com/intr/rb-1641.htm I can see that this is all
about reading data from an EISA SYSTEM ROM. I can't imagine there
doesn't exist some linux-API that allows me to do just the same.
What function calls and header files should I use in order to read
this 'EISA SYSTEM ROM' and assign the correct values to DiSC_Id.it and
DiSC_Id.dma ?
If there doesn't exist an API for this, what memory ranges should i
probe in order to get these values?
Thanks for answers,
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 ---------------------------------------------------------------------- "Any fool can know, the point is to understand." - Albert Einstein - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:25 EST