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NNTP-Posting-Date:	Tue, 18 Apr 2006 21:42:40 -0500
From:	Eric <NoOne AT invalid DOT com>
Subject:	Re: SATA drives and EDD?
Newsgroups:	comp.os.msdos.djgpp
Date:	Tue, 18 Apr 2006 19:42:40 -0700
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Eric wrote:

> Will BIOS int 13h Ah=41h return CY=0 if the only HDD is a SATA drive?
> I've got a ATA DVD-Writer and a SATA HDD  but the int 13 call that checks
> for EDD extensions always returns with CY=1. surely they didnt remove
> these EDD extensions from the BIOS? So I'm guessing that if all you have
> is SATA then the BIOS cant access it via EDD so it returns CY=1
> "pretending " the EDD isnt there?
> ie:
> __dpmi_regs r;
> 
> r.x.bx = 0x55AA;
> r.h.dl = int13_drive_num;
> r.h.ah = 0x41;
> __dpmi_int(0x13, &r);
>   r.x.flags & 1 always == 1
> 
> Note: i havnt tried my code on a non-SATA system.
> Eric
Hmm, i tried my code on a non-SATA system and it works ok.
Am i right in thinking EDD doesnt support SATA?
If so, how does one access sectors on SATA drives (from DOS)?
BTW: I'm quite new to DJGPP and so far its impressed me, i took
one of my linux programs that even had inline asm in it and 
with one simple mod it compiled and ran under dos - sweet!
Eric

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