Path: utzoo!attcan!uunet!aplcen!samsung!cs.utexas.edu!rutgers!cbmvax!jesup
From: jesup@cbmvax.commodore.com (Randell Jesup)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Device driver from device name?
Message-ID: <14697@cbmvax.commodore.com>
Date: 27 Sep 90 19:38:05 GMT
References: <1980@lpami.wimsey.bc.ca>
Reply-To: jesup@cbmvax.commodore.com (Randell Jesup)
Organization: Commodore, West Chester, PA
Lines: 23

In article <1980@lpami.wimsey.bc.ca> lphillips@lpami.wimsey.bc.ca (Larry Phillips) writes:
>          lea	    namesave,A0         ; point at name buffer
>          sub.l   loopreg,loopreg
>          move.b  (a1)+,loopreg       ; gets BSTR length
>          sub.l   #1,loopreg          ; adjust for loop
>3$        move.b  (a1)+,(a0)+         ; get the actual name
>          dbra    loopreg,3$
>          move.b  #':',(a0)+          ; tack a colon onto the end
>          move.b  #0,(a0)+            ; and null terminate it

	Note that entries on the Dos Device list do NOT have ':'s following
them (they are BSTR names followed by a null byte).

	Also, before examining the startup field, etc, you must check that
the node is of type DLT_DEVICE.  Also you must handle Startup values that
are NOT pointers - for example, SER:, PAR:, PRT: take small integers there.

	Under 2.0, all of this is much easier to do.

-- 
Randell Jesup, Keeper of AmigaDos, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.cbm.commodore.com  BIX: rjesup  
Common phrase heard at Amiga Devcon '89: "It's in there!"