Path: utzoo!attcan!uunet!cbmvax!steveb
From: steveb@cbmvax.UUCP (Steve Beats)
Newsgroups: comp.sys.amiga
Subject: Re: Disk environment vector, MakeDosNode
Message-ID: <5193@cbmvax.UUCP>
Date: 8 Nov 88 15:18:33 GMT
References: <5234@louie.udel.EDU>
Reply-To: steveb@cbmvax.UUCP (Steve Beats)
Organization: Commodore Technology, West Chester, PA
Lines: 30

In article <5234@louie.udel.EDU> BRENNER_%DULRUU51.BITNET@cunyvm.cuny.edu writes:
>My questions to the Amiga auditorium:
>
>- Where are those new mountlist entries "MaxTransfer, dostype, etc."
>  located in the disk environment vector (I want to supply the parameters
>  via MakeDosNode()) and what exactly do they mean? The last one that is
>  documented is "DE_BufMemType".

The entries after de_BufMemType are :-

	de_MaxTransfer;		/* Maximum BYTES to xfer in one IORequest */
	de_Mask;		/* Mask to apply to destination address.  It's
				   VERY important to always clear bit 0.
				   Normally this would be 0xfffffe */
	de_BootPri;		/* Normally 0 or -5 for hard drives */
	de_DosType;		/* for a filing system to look at.  The ROM
				   filing system expects 0x444f5300 while
				   FFS expects 0x444f5301 */

>- How do I tell the system to use another filesystem like FFS (not in
>  the mountlist but with AddDosNode())? Should I patch the structure
>  returned by MakeDosNode()?
>
Yes, patch the returned DosNode.  You can either stick the name of the file
system you want loaded into dn_Handler (if it's soft loaded) or you can 
LoadSeg the filing system yourself and stick the returned pointer into
dn_Segment.  I prefer the latter method since you can share filing system
code segments between partitions using this method.

	Steve