Messages in this thread | | | Date | Mon, 27 Aug 2001 21:39:24 +0200 | From | Bart Vandewoestyne <> | Subject | DOS2linux |
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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/
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